diff --git a/.babelrc.js b/.babelrc.js
index 436e94f97465c..0caaf19bf06ea 100644
--- a/.babelrc.js
+++ b/.babelrc.js
@@ -1,46 +1,26 @@
 "use strict";
 
-// Thanks Logan for this.
-// This works around https://github.com/istanbuljs/istanbuljs/issues/92 until
-// we have a version of Istanbul that actually works with 7.x.
-function istanbulHacks() {
-  return {
-    inherits: require("babel-plugin-istanbul").default,
-    visitor: {
-      Program: {
-        exit: function(path) {
-          if (!this.__dv__) return
-
-          const node = path.node.body[0];
-          if (
-            node.type !== "VariableDeclaration" ||
-            node.declarations[0].id.type !== "Identifier" ||
-            !node.declarations[0].id.name.match(/cov_/) ||
-            node._blockHoist !== 3
-          ) {
-            throw new Error("Something has gone wrong in Logan's hacks.");
-          }
-
-          // Gross hacks to put the code coverage block above all compiled
-          // import statement output.
-          node._blockHoist = 5;
-        },
-      },
-    },
-  };
-}
-
-let envOpts = {
+const env = process.env.BABEL_ENV || process.env.NODE_ENV;
+const envOpts = {
   loose: true,
 };
 
+switch (env) {
+  case "development":
+    envOpts.debug = true;
+  // fall-through
+  case "test":
+  case "cov":
+    envOpts.targets = {
+      node: "current",
+    };
+}
+
 const config = {
   comments: false,
-  presets: [
-    ["@babel/env", envOpts],
-  ],
+  presets: [["@babel/env", envOpts]],
   plugins: [
-    // TODO: Use @babel/preset-flow when 
+    // TODO: Use @babel/preset-flow when
     // https://github.com/babel/babel/issues/7233 is fixed
     "@babel/plugin-transform-flow-strip-types",
     ["@babel/proposal-class-properties", { loose: true }],
@@ -48,25 +28,21 @@ const config = {
     "@babel/proposal-numeric-separator",
     ["@babel/proposal-object-rest-spread", { useBuiltIns: true }],
   ],
-  overrides: [{
-    test: "packages/babylon",
-    plugins: [
-      "babel-plugin-transform-charcodes",
-      ["@babel/transform-for-of", { assumeArray: true }],
-    ],
-  }],
+  overrides: [
+    {
+      test: "packages/babylon",
+      plugins: [
+        "babel-plugin-transform-charcodes",
+        ["@babel/transform-for-of", { assumeArray: true }],
+      ],
+    },
+  ],
 };
 
-if (process.env.BABEL_ENV === "cov") {
+// we need to do this as long as we do not test everything from source
+if (env === "cov") {
   config.auxiliaryCommentBefore = "istanbul ignore next";
-  config.plugins.push(istanbulHacks);
-}
-
-if (process.env.BABEL_ENV === "development") {
-  envOpts.targets = {
-    node: "current"
-  };
-  envOpts.debug = true;
+  config.plugins.push("babel-plugin-istanbul");
 }
 
 module.exports = config;
diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000000000..79b85e29f5364
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,61 @@
+version: 2
+aliases:
+  - &restore-node-modules-cache
+    keys:
+      - v1-yarn-deps-{{ checksum "yarn.lock" }}
+
+  - &restore-yarn-cache
+    keys:
+      - v1-yarn-cache
+
+  - &save-node-modules-cache
+    paths:
+      - node_modules
+    key: v1-yarn-deps-{{ checksum "yarn.lock" }}
+
+  - &save-yarn-cache
+    paths:
+      - ~/.yarn-cache
+    key: v1-yarn-cache
+
+  - &yarn-install
+    run: |
+      sudo npm i -g yarn@^1.5.1
+      yarn --version
+
+  - &artifact_babel
+    path: ~/babel/packages/babel-standalone/babel.js
+
+  - &artifact_babel_min
+    path: ~/babel/packages/babel-standalone/babel.min.js
+
+  - &artifact_env
+    path: ~/babel/packages/babel-preset-env-standalone/babel-preset-env.js
+
+  - &artifact_env_min
+    path: ~/babel/packages/babel-preset-env-standalone/babel-preset-env.min.js
+
+jobs:
+  build:
+    working_directory: ~/babel
+    docker:
+      - image: circleci/node:9
+    steps:
+      - checkout
+      - restore-cache: *restore-yarn-cache
+      - restore-cache: *restore-node-modules-cache
+      - *yarn-install
+      - run: make test-ci-coverage
+      # Builds babel-standalone with the regular Babel config
+      - run: make build
+      # test-ci-coverage doesn't test babel-standalone, as trying to gather coverage
+      # data for a JS file that's several megabytes large is bound to fail. Here,
+      # we just run the babel-standalone test separately.
+      - run: ./node_modules/.bin/jest packages/babel-standalone/test/
+      - run: ./node_modules/.bin/jest packages/babel-preset-env-standalone/test/
+      - store_artifacts: *artifact_babel
+      - store_artifacts: *artifact_babel_min
+      - store_artifacts: *artifact_env
+      - store_artifacts: *artifact_env_min
+      - save_cache: *save-node-modules-cache
+      - save_cache: *save-yarn-cache
\ No newline at end of file
diff --git a/.eslintignore b/.eslintignore
index bbfa4a378cb7c..39e51ed1b442a 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,4 +1,6 @@
 /lib
+/build
+package.json
 packages/babel-runtime
 !packages/babel-runtime/scripts
 !packages/babel-runtime/core-js.js
@@ -18,5 +20,4 @@ packages/babel-preset-env-standalone/babel-preset-env.js
 packages/babel-preset-env-standalone/babel-preset-env.min.js
 packages/babel-standalone/babel.js
 packages/babel-standalone/babel.min.js
-packages/babylon/build
 packages/babylon/test/expressions
diff --git a/.eslintrc b/.eslintrc.json
similarity index 64%
rename from .eslintrc
rename to .eslintrc.json
index 38da02aafebbb..a26533ebde85a 100644
--- a/.eslintrc
+++ b/.eslintrc.json
@@ -1,8 +1,7 @@
 {
+  "root": true,
   "extends": "babel",
-  "plugins": [
-    "prettier"
-  ],
+  "plugins": ["prettier"],
   "rules": {
     "curly": ["error", "multi-line"],
     "prettier/prettier": "error",
@@ -13,12 +12,10 @@
   },
   "overrides": [
     {
-      "files": [
-        "packages/*/src/**/*.js",
-        "codemods/*/src/**/*.js"
-      ],
+      "files": ["packages/*/src/**/*.js", "codemods/*/src/**/*.js"],
       "rules": {
-        "no-undefined-identifier": "error"
+        "no-undefined-identifier": "error",
+        "no-deprecated-clone": "error"
       }
     },
     {
@@ -28,7 +25,7 @@
         "test/**/*.js"
       ],
       "env": {
-        "mocha": true
+        "jest": true
       }
     }
   ]
diff --git a/.flowconfig b/.flowconfig
index ff9a56ee0783f..a60a4a9144d5b 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -13,8 +13,8 @@ codemods/*/src
 [libs]
 lib/file.js
 lib/parser.js
-lib/packages/babel-types/lib/index.js.flow
 lib/third-party-libs.js.flow
+packages/babel-types/lib/index.js.flow
 
 [options]
 include_warnings=true
diff --git a/.gitignore b/.gitignore
index 34b621caa069a..2d2ee52239f3e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,15 +16,19 @@ package-lock.json
 !/packages/babel-runtime/core-js/map.js
 /packages/babel-runtime/helpers/*.js
 !/packages/babel-runtime/helpers/toArray.js
+!/packages/babel-runtime/helpers/iterableToArray.js
 !/packages/babel-runtime/helpers/temporalRef.js
 /packages/babel-runtime/helpers/builtin/*.js
 !/packages/babel-runtime/helpers/builtin/toArray.js
+!/packages/babel-runtime/helpers/builtin/iterableToArray.js
 !/packages/babel-runtime/helpers/builtin/temporalRef.js
 /packages/babel-runtime/helpers/builtin/es6/*.js
 !/packages/babel-runtime/helpers/builtin/es6/toArray.js
+!/packages/babel-runtime/helpers/builtin/es6/iterableToArray.js
 !/packages/babel-runtime/helpers/builtin/es6/temporalRef.js
 /packages/babel-runtime/helpers/es6/*.js
 !/packages/babel-runtime/helpers/es6/toArray.js
+!/packages/babel-runtime/helpers/es6/iterableToArray.js
 !/packages/babel-runtime/helpers/es6/temporalRef.js
 /packages/babel-register/test/.babel
 /packages/babel-cli/test/tmp
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000000000..ec6d3cdd7f5b0
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1 @@
+package.json
diff --git a/.prettierrc b/.prettierrc
index f7d1c5e0d570c..371aad410ab4d 100644
--- a/.prettierrc
+++ b/.prettierrc
@@ -1,5 +1,14 @@
 {
+  "arrowParens": "avoid",
   "trailingComma": "es5",
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": false,
+  "bracketSpacing": true,
+  "jsxBracketSameLine": false,
+  "tabWidth": 2,
+  "parser": "babylon",
+  "printWidth": 80,
   "overrides": [{
     "files": [
       "**/codemods/*/src/**/*.js",
diff --git a/.travis.yml b/.travis.yml
index 4f25f7126c45b..43aa9e525bd67 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,7 @@ cache:
   directories:
   - node_modules
 node_js:
+  # We test the latest version on circleci
   - '8'
   - '6'
   - '4'
@@ -19,6 +20,8 @@ env:
 before_install:
   - curl -o- -L https://yarnpkg.com/install.sh | bash
 
+install: yarn --ignore-engines
+
 before_script:
   - 'if [ "$JOB" = "babylon-flow-tests" ]; then make bootstrap-flow; fi'
   - 'if [ "$JOB" = "babylon-test262-tests" ]; then make bootstrap-test262; fi'
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 80a09cc74e3aa..6db766225b58b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -116,7 +116,7 @@ $ TEST_ONLY=babel-cli make test
 
 ```sh
 # Run tests for the @babel/plugin-transform-classes package.
-$ TEST_ONLY=es2015-class make test
+$ TEST_ONLY=babel-plugin-transform-classes make test
 ```
 
 Use the `TEST_GREP` variable to run a subset of tests by name:
@@ -175,7 +175,7 @@ For example, in [`@babel/plugin-transform-exponentiation-operator/test`](https:/
 
 - In each subfolder, you can organize your directory structure by categories of tests. (Example: these folders can be named after the feature you are testing or can reference the issue number they fix)
 - Generally, there are two kinds of tests for plugins
-   - The first is a simple test of the input and output produced by running Babel on some code. We do this by creating an [`input.js`](https://github.com/babel/babel/blob/master/packages/babel-plugin-transform-exponentiation-operator/test/fixtures/exponentian-operator/binary/input.js) file and an [`output.js`](https://github.com/babel/babel/blob/master/packages/babel-plugin-transform-exponentiation-operator/test/fixtures/exponentian-operator/binary/output.js) file.
+   - The first is a simple test of the input and output produced by running Babel on some code. We do this by creating an [`input.js`](https://github.com/babel/babel/blob/master/packages/babel-plugin-transform-exponentiation-operator/test/fixtures/exponentian-operator/binary/input.js) file and an [`output.js`](https://github.com/babel/babel/blob/master/packages/babel-plugin-transform-exponentiation-operator/test/fixtures/exponentian-operator/binary/output.js) file. This kind of test only works in sub-subdirectories of `/fixtures`, i.e. `/fixtures/exponentian-operator/binary/input.js` and **not** `/fixtures/exponentian-operator/input.js`.
    - If you need to expect an error, you can ignore creating the `output.js` file and pass a new `throws` key to the `options.json` that contains the error string that is created.
    - The second and preferred type is a test that actually evaluates the produced code and asserts that certain properties are true or false. We do this by creating an [`exec.js`](https://github.com/babel/babel/blob/master/packages/babel-plugin-transform-exponentiation-operator/test/fixtures/exponentian-operator/comprehensive/exec.js) file.
 
@@ -234,7 +234,7 @@ descriptive name, and add the following:
 After writing tests for babylon, just build it by running:
 
 ```sh
-$ make build-babylon
+$ make build
 ```
 
 Then, to run the tests, use:
diff --git a/Makefile b/Makefile
index 123c16e1a4e0c..94e80e1e2f15b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 MAKEFLAGS = -j1
 FLOW_COMMIT = 622bbc4f07acb77eb1109830c70815f827401d90
-TEST262_COMMIT = 1282e842febf418ca27df13fa4b32f7e5021b470
+TEST262_COMMIT = 52f70e2f637731aae92a9c9a2d831310c3ab2e1e
 
 export NODE_ENV = test
 
@@ -41,16 +41,24 @@ build-dist: build
 
 watch: clean
 	make clean-lib
+
+	# Ensure that build artifacts for types are created during local
+	# development too.
+	BABEL_ENV=development ./node_modules/.bin/gulp build-no-bundle
+	node ./packages/babel-types/scripts/generateTypeHelpers.js
+	node scripts/generators/flow.js > ./packages/babel-types/lib/index.js.flow
 	BABEL_ENV=development ./node_modules/.bin/gulp watch
 
 flow:
 	./node_modules/.bin/flow check --strip-root
 
 lint:
-	./node_modules/.bin/eslint scripts $(SOURCES) *.js --format=codeframe --rulesdir="./scripts/eslint_rules"
+	./node_modules/.bin/eslint scripts $(SOURCES) '*.js' '**/.*.js' --format=codeframe --rulesdir="./scripts/eslint_rules"
 
 fix:
-	./node_modules/.bin/eslint scripts $(SOURCES) *.js --format=codeframe --fix --rulesdir="./scripts/eslint_rules"
+	# The config is hardcoded because otherwise prettier searches for it and also picks up some broken package.json files from tests
+	./node_modules/.bin/prettier --config .prettierrc --write --ignore-path .eslintignore '**/*.json'
+	./node_modules/.bin/eslint scripts $(SOURCES) '*.js' '**/.*.js' --format=codeframe --fix --rulesdir="./scripts/eslint_rules"
 
 clean: test-clean
 	rm -rf packages/babel-polyfill/browser*
@@ -75,7 +83,7 @@ test-ci:
 test-ci-coverage: SHELL:=/bin/bash
 test-ci-coverage:
 	BABEL_ENV=cov make bootstrap
-	./scripts/test-cov.sh
+	TEST_TYPE=cov ./scripts/test-cov.sh
 	bash <(curl -s https://codecov.io/bash) -f coverage/coverage-final.json
 
 bootstrap-flow:
@@ -124,8 +132,8 @@ publish:
 
 bootstrap:
 	make clean-all
-	yarn
-	./node_modules/.bin/lerna bootstrap
+	yarn --ignore-engines
+	./node_modules/.bin/lerna bootstrap -- --ignore-engines
 	make build
 	cd packages/babel-runtime; \
 	node scripts/build-dist.js
diff --git a/circle.yml b/circle.yml
deleted file mode 100644
index 4028adfc42abd..0000000000000
--- a/circle.yml
+++ /dev/null
@@ -1,30 +0,0 @@
-general:
-  artifacts:
-    - "packages/babel-standalone/babel.js"
-    - "packages/babel-standalone/babel.min.js"
-    - "packages/babel-preset-env-standalone/babel-preset-env.js"
-    - "packages/babel-preset-env-standalone/babel-preset-env.min.js"
-
-machine:
-  node:
-    version:
-      8
-
-dependencies:
-  pre:
-    - curl -o- -L https://yarnpkg.com/install.sh | bash
-  cache_directories:
-    - ~/.yarn-cache
-  override:
-    - yarn
-
-test:
-  override:
-    - make test-ci-coverage
-    # Builds babel-standalone with the regular Babel config
-    - make build
-    # test-ci-coverage doesn't test babel-standalone, as trying to gather coverage
-    # data for a JS file that's several megabytes large is bound to fail. Here,
-    # we just run the babel-standalone test separately.
-    - ./node_modules/mocha/bin/_mocha packages/babel-standalone/test/ --opts test/mocha.opts
-    - ./node_modules/mocha/bin/_mocha packages/babel-preset-env-standalone/test/ --opts test/mocha.opts
diff --git a/codemods/babel-plugin-codemod-optional-catch-binding/package.json b/codemods/babel-plugin-codemod-optional-catch-binding/package.json
index efb72d5e85821..602534c6e2fe7 100644
--- a/codemods/babel-plugin-codemod-optional-catch-binding/package.json
+++ b/codemods/babel-plugin-codemod-optional-catch-binding/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-codemod-optional-catch-binding",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Remove unused catch bindings",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-remove-unused-catch-binding",
   "license": "MIT",
@@ -9,13 +9,13 @@
     "@babel/plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.39"
+    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/doc/design/monorepo.md b/doc/design/monorepo.md
index e8544bfcee9bd..d10cc9741b762 100644
--- a/doc/design/monorepo.md
+++ b/doc/design/monorepo.md
@@ -15,7 +15,7 @@ This is quite taboo but let's look at the pros and cons:
  * Easy to coordinate changes across modules.
  * Single place to report issues.
  * Easier to setup a development environment.
- * Tests across modules are ran together which finds bugs that touch multiple modules easier.
+ * Tests across modules are run together which finds bugs that touch multiple modules easier.
 
 **Cons:**
 
diff --git a/lerna.json b/lerna.json
index 8c57a156712bb..c98859af04ec2 100644
--- a/lerna.json
+++ b/lerna.json
@@ -1,16 +1,16 @@
 {
   "lerna": "2.0.0-rc.4",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "changelog": {
     "repo": "babel/babel",
     "labels": {
-      "PR: Spec Compliancy": ":eyeglasses: Spec Compliancy",
-      "PR: Breaking Change": ":boom: Breaking Change",
-      "PR: New Feature": ":rocket: New Feature",
-      "PR: Bug Fix": ":bug: Bug Fix",
-      "PR: Polish": ":nail_care: Polish",
-      "PR: Docs": ":memo: Documentation",
-      "PR: Internal": ":house: Internal"
+      "PR: Spec Compliancy :eyeglasses:": ":eyeglasses: Spec Compliancy",
+      "PR: Breaking Change :boom:": ":boom: Breaking Change",
+      "PR: New Feature :rocket:": ":rocket: New Feature",
+      "PR: Bug Fix :bug:": ":bug: Bug Fix",
+      "PR: Polish :nail_care:": ":nail_care: Polish",
+      "PR: Docs :memo:": ":memo: Documentation",
+      "PR: Internal :house:": ":house: Internal"
     }
   },
   "cacheDir": ".changelog",
diff --git a/lib/third-party-libs.js.flow b/lib/third-party-libs.js.flow
index 97d19dfda262e..df59f5032f161 100644
--- a/lib/third-party-libs.js.flow
+++ b/lib/third-party-libs.js.flow
@@ -3,9 +3,9 @@
  */
 
 declare module "micromatch" {
-  declare function exports(Array<string>, Array<string>, ?{
-    nocase: boolean,
-  }): Array<string>;
+  declare module.exports: {
+    (Array<string>, Array<string>, ?{ nocase: boolean }): Array<string>,
+  };
 }
 
 declare module "resolve" {
diff --git a/package.json b/package.json
index baf7716f07e33..651b1b333413f 100644
--- a/package.json
+++ b/package.json
@@ -10,32 +10,33 @@
     "test": "make test"
   },
   "devDependencies": {
-    "@babel/cli": "7.0.0-beta.39",
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/preset-env": "7.0.0-beta.39",
-    "@babel/preset-flow": "7.0.0-beta.39",
-    "@babel/preset-stage-0": "7.0.0-beta.39",
-    "@babel/register": "7.0.0-beta.39",
-    "async": "^1.5.0",
+    "@babel/cli": "7.0.0-beta.41",
+    "@babel/core": "7.0.0-beta.41",
+    "@babel/preset-env": "7.0.0-beta.41",
+    "@babel/preset-flow": "7.0.0-beta.41",
+    "@babel/preset-stage-0": "7.0.0-beta.41",
+    "@babel/register": "7.0.0-beta.41",
+    "babel-core": "^7.0.0-0",
     "babel-eslint": "^8.0.1",
+    "babel-jest": "^22.4.1",
     "babel-loader": "8.0.0-beta.0",
-    "babel-plugin-istanbul": "^4.1.4",
-    "babel-plugin-transform-charcodes": "0.0.10",
-    "babylon": "7.0.0-beta.39",
+    "babel-plugin-transform-charcodes": "^0.1.0",
+    "babylon": "7.0.0-beta.41",
     "browserify": "^13.1.1",
     "bundle-collapser": "^1.2.1",
     "chai": "^4.1.0",
-    "chalk": "^2.0.0",
-    "charcodes": "0.0.10",
+    "chalk": "^2.3.2",
+    "charcodes": "^0.1.0",
     "derequire": "^2.0.2",
-    "eslint": "^4.5.0",
+    "enhanced-resolve": "^3.0.0",
+    "eslint": "^4.18.2",
     "eslint-config-babel": "^7.0.2",
     "eslint-plugin-flowtype": "^2.20.0",
     "eslint-plugin-prettier": "^2.5.0",
-    "flow-bin": "^0.59.0",
+    "flow-bin": "^0.66.0",
     "graceful-fs": "^4.1.11",
     "gulp": "^3.9.0",
-    "gulp-babel": "^8.0.0-beta.0",
+    "gulp-babel": "^8.0.0-beta.2",
     "gulp-filter": "^5.1.0",
     "gulp-newer": "^1.0.0",
     "gulp-plumber": "^1.0.1",
@@ -44,24 +45,22 @@
     "gulp-util": "^3.0.7",
     "gulp-watch": "^4.3.5",
     "husky": "^0.14.3",
+    "jest": "^22.4.2",
     "lerna": "2.0.0",
     "lerna-changelog": "^0.5.0",
     "lint-staged": "^6.0.1",
     "lodash": "^4.2.0",
     "merge-stream": "^1.0.1",
-    "mocha": "^3.0.0",
-    "nyc": "^11.0.3",
     "output-file-sync": "^2.0.0",
-    "prettier": "1.10.2",
+    "prettier": "1.11.1",
     "pump": "^1.0.2",
     "rimraf": "^2.4.3",
     "rollup-plugin-babel": "^4.0.0-beta.0",
     "rollup-plugin-node-resolve": "^3.0.2",
     "rollup-stream": "^1.24.1",
-    "semver": "^5.0.0",
+    "test262-stream": "^1.1.0",
     "through2": "^2.0.0",
     "uglify-js": "^2.4.16",
-    "util.promisify": "^1.0.0",
     "vinyl-buffer": "^1.0.1",
     "vinyl-source-stream": "^2.0.0",
     "webpack": "^3.4.1",
@@ -73,20 +72,45 @@
     "npm": ">= 2.x <= 5.x",
     "yarn": ">=0.27.5 || >=1.0.0-20170811"
   },
-  "nyc": {
-    "all": true,
-    "exclude": [
-      "scripts/*.js",
-      "packages/*/test/**",
-      "packages/babel-standalone/**",
-      "codemods/*/test/**"
-    ],
-    "sourceMap": false,
-    "instrument": false
-  },
   "lint-staged": {
     "*.js": [
       "eslint --format=codeframe --rulesdir='./scripts/eslint_rules'"
     ]
+  },
+  "jest": {
+    "collectCoverageFrom": [
+      "packages/*/src/**/*.mjs",
+      "packages/*/src/**/*.js",
+      "codemods/*/src/**/*.mjs",
+      "codemods/*/src/**/*.js"
+    ],
+    "testRegex": "./(packages|codemods)/[^/]+/test/.+\\.m?js$",
+    "testPathIgnorePatterns": [
+      "/node_modules/",
+      "/test/fixtures/",
+      "/test/debug-fixtures/",
+      "/babylon/test/expressions/",
+      "/test/tmp/",
+      "/test/__data__/",
+      "/test/helpers/",
+      "<rootDir>/test/warning\\.js",
+      "<rootDir>/build/",
+      "_browser\\.js"
+    ],
+    "testEnvironment": "node",
+    "setupTestFrameworkScriptFile": "<rootDir>/test/testSetupFile.js",
+    "transformIgnorePatterns": [
+      "/node_modules/",
+      "<rootDir>/packages/babel-standalone/babel(\\.min)?\\.js",
+      "<rootDir>/packages/babel-preset-env-standalone/babel-preset-env(\\.min)?\\.js",
+      "/test/(fixtures|tmp|__data__)/",
+      "<rootDir>/(packages|codemods)/[^/]+/lib/"
+    ],
+    "modulePathIgnorePatterns": [
+      "/test/fixtures/",
+      "/test/tmp/",
+      "/test/__data__/",
+      "<rootDir>/build/"
+    ]
   }
 }
diff --git a/packages/README.md b/packages/README.md
index 07b340f2bfd6d..7c3f1ab8d6433 100644
--- a/packages/README.md
+++ b/packages/README.md
@@ -13,15 +13,15 @@ A monorepo, muhahahahahaha. See the [monorepo design doc](/doc/design/monorepo.m
 
 | Package | Version | Dependencies |
 |--------|-------|------------|
-| [`@babel/core`](/packages/babel-core) | [![npm](https://img.shields.io/npm/v/babel-core.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-core) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-core)](https://david-dm.org/babel/babel?path=packages/babel-core) |
-| [`babylon`](https://github.com/babel/babel/tree/master/packages/babylon) | [![npm](https://img.shields.io/npm/v/babylon.svg?maxAge=2592000)](https://www.npmjs.com/package/babylon) | [![Dependency Status](https://david-dm.org/babel/babylon.svg)](https://david-dm.org/babel/babylon) |
-| [`@babel/traverse`](/packages/babel-traverse) | [![npm](https://img.shields.io/npm/v/babel-traverse.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-traverse) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-traverse)](https://david-dm.org/babel/babel?path=packages/babel-traverse) |
-| [`@babel/generator`](/packages/babel-generator) | [![npm](https://img.shields.io/npm/v/babel-generator.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-generator) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-generator)](https://david-dm.org/babel/babel?path=packages/babel-generator) |
+| [`@babel/core`](/packages/babel-core) | [![npm](https://img.shields.io/npm/v/@babel/core.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/core) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-core)](https://david-dm.org/babel/babel?path=packages/babel-core) |
+| [`babylon`](/packages/babylon) | [![npm](https://img.shields.io/npm/v/babylon.svg?maxAge=2592000)](https://www.npmjs.com/package/babylon) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babylon)](https://david-dm.org/babel/babel?path=packages/babylon) |
+| [`@babel/traverse`](/packages/babel-traverse) | [![npm](https://img.shields.io/npm/v/@babel/traverse.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/traverse) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-traverse)](https://david-dm.org/babel/babel?path=packages/babel-traverse) |
+| [`@babel/generator`](/packages/babel-generator) | [![npm](https://img.shields.io/npm/v/@babel/generator.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/generator) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-generator)](https://david-dm.org/babel/babel?path=packages/babel-generator) |
 
 [`@babel/core`](/packages/babel-core) is the Babel compiler itself; it exposes the `babel.transform` method, where `transformedCode = transform(src).code`.
 
 The compiler can be broken down into 3 parts:
-- The parser: [`babylon`](https://github.com/babel/babel/tree/master/packages/babylon)
+- The parser: [`babylon`](/packages/babylon)
 - The transformer[s]: All the plugins/presets
   - These all use [`@babel/traverse`](/packages/babel-traverse) to traverse through the AST
 - The generator: [`@babel/generator`](/packages/babel-generator)
@@ -36,18 +36,18 @@ Check out the [`babel-handbook`](https://github.com/thejameskyle/babel-handbook/
 
 | Package | Version | Dependencies |
 |--------|-------|------------|
-| [`@babel/cli`](/packages/babel-cli) | [![npm](https://img.shields.io/npm/v/babel-cli.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-cli) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-cli)](https://david-dm.org/babel/babel?path=packages/babel-cli) |
-| [`@babel/types`](/packages/babel-types) | [![npm](https://img.shields.io/npm/v/babel-types.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-types) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-types)](https://david-dm.org/babel/babel?path=packages/babel-types) |
-| [`@babel/polyfill`](/packages/babel-polyfill) | [![npm](https://img.shields.io/npm/v/babel-polyfill.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-polyfill) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-polyfill)](https://david-dm.org/babel/babel?path=packages/babel-polyfill) |
-| [`@babel/runtime`](/packages/babel-runtime) | [![npm](https://img.shields.io/npm/v/babel-runtime.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-runtime) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-runtime)](https://david-dm.org/babel/babel?path=packages/babel-runtime) |
-| [`@babel/register`](/packages/babel-register) | [![npm](https://img.shields.io/npm/v/babel-register.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-register) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-register)](https://david-dm.org/babel/babel?path=packages/babel-register) |
-| [`@babel/template`](/packages/babel-template) | [![npm](https://img.shields.io/npm/v/babel-template.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-template) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-template)](https://david-dm.org/babel/babel?path=packages/babel-template) |
-| [`@babel/helpers`](/packages/babel-helpers) | [![npm](https://img.shields.io/npm/v/babel-helpers.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-helpers) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-helpers)](https://david-dm.org/babel/babel?path=packages/babel-helpers) |
-| [`@babel/code-frame`](/packages/babel-code-frame) | [![npm](https://img.shields.io/npm/v/babel-code-frame.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-code-frame) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-code-frame)](https://david-dm.org/babel/babel?path=packages/babel-code-frame) |
+| [`@babel/cli`](/packages/babel-cli) | [![npm](https://img.shields.io/npm/v/@babel/cli.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/cli) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-cli)](https://david-dm.org/babel/babel?path=packages/babel-cli) |
+| [`@babel/types`](/packages/babel-types) | [![npm](https://img.shields.io/npm/v/@babel/types.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/types) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-types)](https://david-dm.org/babel/babel?path=packages/babel-types) |
+| [`@babel/polyfill`](/packages/babel-polyfill) | [![npm](https://img.shields.io/npm/v/@babel/polyfill.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/polyfill) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-polyfill)](https://david-dm.org/babel/babel?path=packages/babel-polyfill) |
+| [`@babel/runtime`](/packages/babel-runtime) | [![npm](https://img.shields.io/npm/v/@babel/runtime.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/runtime) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-runtime)](https://david-dm.org/babel/babel?path=packages/babel-runtime) |
+| [`@babel/register`](/packages/babel-register) | [![npm](https://img.shields.io/npm/v/@babel/register.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/register) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-register)](https://david-dm.org/babel/babel?path=packages/babel-register) |
+| [`@babel/template`](/packages/babel-template) | [![npm](https://img.shields.io/npm/v/@babel/template.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/template) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-template)](https://david-dm.org/babel/babel?path=packages/babel-template) |
+| [`@babel/helpers`](/packages/babel-helpers) | [![npm](https://img.shields.io/npm/v/@babel/helpers.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/helpers) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-helpers)](https://david-dm.org/babel/babel?path=packages/babel-helpers) |
+| [`@babel/code-frame`](/packages/babel-code-frame) | [![npm](https://img.shields.io/npm/v/@babel/code-frame.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/code-frame) | [![Dependency Status](https://david-dm.org/babel/babel.svg?path=packages/babel-code-frame)](https://david-dm.org/babel/babel?path=packages/babel-code-frame) |
 
 - [`@babel/cli`](/packages/babel-cli) is the CLI tool that runs `@babel/core` and helps with outputting to a directory, a file, stdout and more (also includes `@babel/node` cli). Check out the [docs](https://babeljs.io/docs/usage/cli/).
 - [`@babel/types`](/packages/babel-types) is used to validate, build and change AST nodes.
-- [`@babel/polyfill`](/packages/babel-polyfill) is [literally a wrapper](https://github.com/babel/babel/blob/master/packages/babel-polyfill/src/index.js) around [`core-js`](https://github.com/zloirock/core-js) and [regenerator-runtime](https://github.com/facebook/regenerator/tree/master/packages/regenerator-runtime). Check out the [docs](https://babeljs.io/docs/usage/polyfill/).
+- [`@babel/polyfill`](/packages/babel-polyfill) is [literally a wrapper](/packages/babel-polyfill/src/index.js) around [`core-js`](https://github.com/zloirock/core-js) and [regenerator-runtime](https://github.com/facebook/regenerator/tree/master/packages/regenerator-runtime). Check out the [docs](https://babeljs.io/docs/usage/polyfill/).
 - [`@babel/runtime`](/packages/babel-runtime) is similar to the polyfill except that it doesn't modify the global scope and is to be used with [`@babel/plugin-transform-runtime`](/packages/babel-plugin-transform-runtime) (usually in library/plugin code). Check out the [docs](https://babeljs.io/docs/plugins/transform-runtime/).
 - [`@babel/register`](/packages/babel-register) is a way to automatically compile files with Babel on the fly by binding to Node.js `require`. Check out the [docs](http://babeljs.io/docs/usage/require/).
 - [`@babel/template`](/packages/babel-template) is a helper function that allows constructing AST nodes from a string presentation of the code; this eliminates the tedium of using `@babel/types` for building AST nodes.
@@ -62,7 +62,7 @@ The transformer[s] used in Babel are the independent pieces of code that transfo
 
 | Package | Version | Dependencies | Description |
 |--------|-------|------------|---|
-| [`@babel/preset-env`](https://github.com/babel/babel-preset-env) | [![npm](https://img.shields.io/npm/v/babel-preset-env.svg?maxAge=2592000)](https://www.npmjs.com/package/babel-preset-env) | [![Dependency Status](https://david-dm.org/babel/babel-preset-env.svg)](https://david-dm.org/babel/babel-preset-env) | automatically determines plugins and polyfills you need based on your supported environments |
+| [`@babel/preset-env`](/packages/babel-preset-env) | [![npm](https://img.shields.io/npm/v/@babel/preset-env.svg?maxAge=2592000)](https://www.npmjs.com/package/@babel/preset-env) | [![Dependency Status](https://david-dm.org/babel/babel/status.svg?path=packages/babel-preset-env)](https://david-dm.org/babel/babel?path=packages/babel-preset-env) | automatically determines plugins and polyfills you need based on your supported environments |
 
 > You can find community maintained presets on [npm](https://www.npmjs.com/search?q=babel-preset)
 
diff --git a/packages/babel-cli/package.json b/packages/babel-cli/package.json
index 8260d9814ef80..1e8722c2758f0 100644
--- a/packages/babel-cli/package.json
+++ b/packages/babel-cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/cli",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel command line.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -29,11 +29,11 @@
     "chokidar": "^1.6.1"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-fixtures": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-fixtures": "7.0.0-beta.42"
   },
   "bin": {
     "babel": "./bin/babel.js",
diff --git a/packages/babel-cli/src/babel/dir.js b/packages/babel-cli/src/babel/dir.js
index ce00f14d858f8..e03daf9cf450e 100644
--- a/packages/babel-cli/src/babel/dir.js
+++ b/packages/babel-cli/src/babel/dir.js
@@ -6,6 +6,8 @@ import fs from "fs";
 
 import * as util from "./util";
 
+let compiledFiles = 0;
+
 export default function(commander, filenames, opts) {
   function write(src, relative, base, callback) {
     if (typeof base === "function") {
@@ -26,7 +28,6 @@ export default function(commander, filenames, opts) {
       defaults(
         {
           sourceFileName: slash(path.relative(dest + "/..", src)),
-          sourceMapTarget: path.basename(relative),
         },
         opts,
       ),
@@ -42,12 +43,15 @@ export default function(commander, filenames, opts) {
         ) {
           const mapLoc = dest + ".map";
           res.code = util.addSourceMappingUrl(res.code, mapLoc);
+          res.map.file = path.basename(relative);
           outputFileSync(mapLoc, JSON.stringify(res.map));
         }
 
         outputFileSync(dest, res.code);
         util.chmod(src, dest);
 
+        compiledFiles += 1;
+
         util.log(src + " -> " + dest);
         return callback(null, true);
       },
@@ -59,6 +63,13 @@ export default function(commander, filenames, opts) {
     return path.join(commander.outDir, filename);
   }
 
+  function outputDestFolder(outDir) {
+    const outDirPath = path.resolve(outDir);
+    if (!fs.existsSync(outDirPath)) {
+      fs.mkdirSync(outDirPath);
+    }
+  }
+
   function handleFile(src, filename, base, callback) {
     if (typeof base === "function") {
       callback = base;
@@ -78,6 +89,11 @@ export default function(commander, filenames, opts) {
   }
 
   function sequentialHandleFile(files, dirname, index, callback) {
+    if (files.length === 0) {
+      outputDestFolder(commander.outDir);
+      return;
+    }
+
     if (typeof index === "function") {
       callback = index;
       index = 0;
@@ -125,10 +141,17 @@ export default function(commander, filenames, opts) {
     const filename = filenames[index];
 
     handle(filename, function(err) {
-      if (err) throw err;
+      if (err) throw new Error(err);
       index++;
       if (index !== filenames.length) {
         sequentialHandle(filenames, index);
+      } else {
+        util.log(
+          `🎉  Successfully compiled ${compiledFiles} ${
+            compiledFiles > 1 ? "files" : "file"
+          } with Babel.`,
+          true,
+        );
       }
     });
   }
diff --git a/packages/babel-cli/src/babel/file.js b/packages/babel-cli/src/babel/file.js
index 9a08545b76595..def6aa3eb7d11 100644
--- a/packages/babel-cli/src/babel/file.js
+++ b/packages/babel-cli/src/babel/file.js
@@ -16,7 +16,10 @@ export default function(commander, filenames, opts) {
 
   const buildResult = function() {
     const map = new sourceMap.SourceMapGenerator({
-      file: path.basename(commander.outFile || "") || "stdout",
+      file:
+        commander.sourceMapTarget ||
+        path.basename(commander.outFile || "") ||
+        "stdout",
       sourceRoot: opts.sourceRoot,
     });
 
diff --git a/packages/babel-cli/src/babel/index.js b/packages/babel-cli/src/babel/index.js
index 606f5b33cd026..68a4c9b80e45d 100755
--- a/packages/babel-cli/src/babel/index.js
+++ b/packages/babel-cli/src/babel/index.js
@@ -163,7 +163,7 @@ commander.option(
   "--include-dotfiles",
   "Include dotfiles when compiling and copying non-compilable files",
 );
-commander.option("-q, --quiet", "Don't log anything");
+commander.option("--verbose", "Log everything");
 commander.option(
   "--delete-dir-on-start",
   "Delete the out directory before compilation",
@@ -221,6 +221,17 @@ if (commander.deleteDirOnStart && !commander.outDir) {
   errors.push("--delete-dir-on-start requires --out-dir");
 }
 
+if (
+  !commander.outDir &&
+  filenames.length === 0 &&
+  typeof commander.filename !== "string" &&
+  commander.babelrc !== false
+) {
+  errors.push(
+    "stdin compilation requires either -f/--filename [filename] or --no-babelrc",
+  );
+}
+
 if (errors.length) {
   console.error(errors.join(". "));
   process.exit(2);
@@ -243,11 +254,12 @@ delete opts.outFile;
 delete opts.outDir;
 delete opts.copyFiles;
 delete opts.includeDotfiles;
-delete opts.quiet;
+delete opts.verbose;
 delete opts.configFile;
 delete opts.deleteDirOnStart;
 delete opts.keepFileExtension;
 delete opts.relative;
+delete opts.sourceMapTarget;
 
 // Commander will default the "--no-" arguments to true, but we want to leave them undefined so that
 // @babel/core can handle the default-assignment logic on its own.
diff --git a/packages/babel-cli/src/babel/util.js b/packages/babel-cli/src/babel/util.js
index a08580578a49c..d2b1c7795856d 100644
--- a/packages/babel-cli/src/babel/util.js
+++ b/packages/babel-cli/src/babel/util.js
@@ -46,8 +46,8 @@ export function addSourceMappingUrl(code, loc) {
   return code + "\n//# sourceMappingURL=" + path.basename(loc);
 }
 
-export function log(msg) {
-  if (!commander.quiet) console.log(msg);
+export function log(msg, force) {
+  if (force === true || commander.verbose) console.log(msg);
 }
 
 export function transform(filename, code, opts, callback) {
@@ -63,7 +63,7 @@ export function compile(filename, opts, callback) {
     if (err) {
       if (commander.watch) {
         console.error(err);
-        return callback(null, { ignored: true });
+        return callback(null, null);
       } else {
         return callback(err);
       }
diff --git a/packages/babel-cli/test/fixtures/babel/--config-file babelrc nocomment/options.json b/packages/babel-cli/test/fixtures/babel/--config-file babelrc nocomment/options.json
index 40288838f2047..a5d9f81b4756e 100644
--- a/packages/babel-cli/test/fixtures/babel/--config-file babelrc nocomment/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/--config-file babelrc nocomment/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["--config-file", "../.othername_babelrc"]
-}
\ No newline at end of file
+  "args": ["--config-file", "../.othername_babelrc", "-f", "file.js"]
+}
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with ignore/options.json b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with ignore/options.json
index 630fe96c37590..729a051678e27 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with ignore/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with ignore/options.json	
@@ -4,6 +4,7 @@
     "--out-dir", "lib",
     "--copy-files",
     "--include-dotfiles",
-    "--ignore", "src/foo"
+    "--ignore", "src/foo",
+    "--verbose"
   ]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with ignore/stdout.txt b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with ignore/stdout.txt
index 6a861c56743bf..4c36e94a0a235 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with ignore/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with ignore/stdout.txt	
@@ -1 +1,2 @@
 src/index.js -> lib/index.js
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with only/options.json b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with only/options.json
index 11a257f17477a..64034dfa62daf 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with only/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with only/options.json	
@@ -4,6 +4,7 @@
     "--out-dir", "lib",
     "--copy-files",
     "--include-dotfiles",
-    "--only", "src/foo"
+    "--only", "src/foo",
+    "--verbose"
   ]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with only/stdout.txt b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with only/stdout.txt
index 10cf3c8b56193..f6e3f3a3ade64 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with only/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles with only/stdout.txt	
@@ -1,2 +1,3 @@
 src/foo/.foo.js -> lib/foo/.foo.js
 src/foo/bar.js -> lib/foo/bar.js
+🎉  Successfully compiled 2 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles/options.json b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles/options.json
index 977282bb22f0f..4d90f91ad5f4e 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--out-dir", "lib", "--copy-files", "--include-dotfiles"]
+  "args": ["src", "--out-dir", "lib", "--copy-files", "--include-dotfiles", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles/stdout.txt b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles/stdout.txt
index 0b10e8a19514c..fdc15905a3bbf 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files --include-dotfiles/stdout.txt	
@@ -1,3 +1,4 @@
 src/.foo.js -> lib/.foo.js
 src/bar/index.js -> lib/bar/index.js
 src/foo/foo.js -> lib/foo/foo.js
+🎉  Successfully compiled 3 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files with ignore/options.json b/packages/babel-cli/test/fixtures/babel/--copy-files with ignore/options.json
index 184b645047024..c5551001db26e 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files with ignore/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files with ignore/options.json	
@@ -3,6 +3,7 @@
     "src",
     "--out-dir", "lib",
     "--copy-files",
-    "--ignore", "src/foo/*"
+    "--ignore", "src/foo/*",
+    "--verbose"
   ]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files with ignore/stdout.txt b/packages/babel-cli/test/fixtures/babel/--copy-files with ignore/stdout.txt
index 6a861c56743bf..4c36e94a0a235 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files with ignore/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files with ignore/stdout.txt	
@@ -1 +1,2 @@
 src/index.js -> lib/index.js
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files with only/options.json b/packages/babel-cli/test/fixtures/babel/--copy-files with only/options.json
index 668ea26458345..a1c2f38e399eb 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files with only/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files with only/options.json	
@@ -3,6 +3,7 @@
     "src",
     "--out-dir", "lib",
     "--copy-files",
-    "--only", "src/foo/*"
+    "--only", "src/foo/*",
+    "--verbose"
   ]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files with only/stdout.txt b/packages/babel-cli/test/fixtures/babel/--copy-files with only/stdout.txt
index e0a4d292bbbeb..2021cfb5e6039 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files with only/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files with only/stdout.txt	
@@ -1 +1,2 @@
 src/foo/bar.js -> lib/foo/bar.js
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files/options.json b/packages/babel-cli/test/fixtures/babel/--copy-files/options.json
index 68814a2001596..c328b7ff8d234 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files/options.json
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files/options.json
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--out-dir", "lib", "--copy-files"]
+  "args": ["src", "--out-dir", "lib", "--copy-files", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--copy-files/stdout.txt b/packages/babel-cli/test/fixtures/babel/--copy-files/stdout.txt
index 4a85f7008cf34..80351563d03d6 100644
--- a/packages/babel-cli/test/fixtures/babel/--copy-files/stdout.txt
+++ b/packages/babel-cli/test/fixtures/babel/--copy-files/stdout.txt
@@ -1,2 +1,3 @@
 src/bar/index.js -> lib/bar/index.js
 src/foo/foo.js -> lib/foo/foo.js
+🎉  Successfully compiled 2 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/--ignore complete/options.json b/packages/babel-cli/test/fixtures/babel/--ignore complete/options.json
index b4c4db71f38be..e273636154d4f 100644
--- a/packages/babel-cli/test/fixtures/babel/--ignore complete/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/--ignore complete/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--out-dir", "lib", "--ignore", "src/bar"]
+  "args": ["src", "--out-dir", "lib", "--ignore", "src/bar", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--ignore complete/stdout.txt b/packages/babel-cli/test/fixtures/babel/--ignore complete/stdout.txt
index 437c95684152a..0d15bf2ae095a 100644
--- a/packages/babel-cli/test/fixtures/babel/--ignore complete/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/--ignore complete/stdout.txt	
@@ -1 +1,2 @@
 src/foobar/foo.js -> lib/foobar/foo.js
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/--ignore glob/options.json b/packages/babel-cli/test/fixtures/babel/--ignore glob/options.json
index 8c15a2b28c51b..7d99d8d040d5a 100644
--- a/packages/babel-cli/test/fixtures/babel/--ignore glob/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/--ignore glob/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--out-dir", "lib", "--ignore", "**/*.foo.js"]
+  "args": ["src", "--out-dir", "lib", "--ignore", "**/*.foo.js", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--ignore glob/stdout.txt b/packages/babel-cli/test/fixtures/babel/--ignore glob/stdout.txt
index 22e2f9915714d..03b326e512c3a 100644
--- a/packages/babel-cli/test/fixtures/babel/--ignore glob/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/--ignore glob/stdout.txt	
@@ -2,3 +2,4 @@ src/a.js -> lib/a.js
 src/b.js -> lib/b.js
 src/baz/c.js -> lib/baz/c.js
 src/foo.js -> lib/foo.js
+🎉  Successfully compiled 4 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/--ignore/options.json b/packages/babel-cli/test/fixtures/babel/--ignore/options.json
index 1911426f62ba9..3673f5a490dad 100644
--- a/packages/babel-cli/test/fixtures/babel/--ignore/options.json
+++ b/packages/babel-cli/test/fixtures/babel/--ignore/options.json
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--out-dir", "lib", "--ignore", "src/foo/*"]
+  "args": ["src", "--out-dir", "lib", "--ignore", "src/foo/*", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--ignore/stdout.txt b/packages/babel-cli/test/fixtures/babel/--ignore/stdout.txt
index 1eb8f922d18f7..1c0cc552e31b0 100644
--- a/packages/babel-cli/test/fixtures/babel/--ignore/stdout.txt
+++ b/packages/babel-cli/test/fixtures/babel/--ignore/stdout.txt
@@ -1 +1,2 @@
 src/bar/index.js -> lib/bar/index.js
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/--only glob/options.json b/packages/babel-cli/test/fixtures/babel/--only glob/options.json
index 8066c21c83984..48cb01f4e5b18 100644
--- a/packages/babel-cli/test/fixtures/babel/--only glob/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/--only glob/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--out-dir", "lib", "--only", "**/*.foo.js"]
+  "args": ["src", "--out-dir", "lib", "--only", "**/*.foo.js", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--only glob/stdout.txt b/packages/babel-cli/test/fixtures/babel/--only glob/stdout.txt
index ff1917afe9bf3..a5c024b79339d 100644
--- a/packages/babel-cli/test/fixtures/babel/--only glob/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/--only glob/stdout.txt	
@@ -1,2 +1,3 @@
 src/a.foo.js -> lib/a.foo.js
 src/baz/b.foo.js -> lib/baz/b.foo.js
+🎉  Successfully compiled 2 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/--only/options.json b/packages/babel-cli/test/fixtures/babel/--only/options.json
index 7b05f3fb824c6..16a8c29b33bb7 100644
--- a/packages/babel-cli/test/fixtures/babel/--only/options.json
+++ b/packages/babel-cli/test/fixtures/babel/--only/options.json
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--out-dir", "lib", "--only", "src/bar/*"]
+  "args": ["src", "--out-dir", "lib", "--only", "src/bar/*", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/--only/stdout.txt b/packages/babel-cli/test/fixtures/babel/--only/stdout.txt
index 1eb8f922d18f7..1c0cc552e31b0 100644
--- a/packages/babel-cli/test/fixtures/babel/--only/stdout.txt
+++ b/packages/babel-cli/test/fixtures/babel/--only/stdout.txt
@@ -1 +1,2 @@
 src/bar/index.js -> lib/bar/index.js
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --copy-files/options.json b/packages/babel-cli/test/fixtures/babel/dir --out-dir --copy-files/options.json
index 68814a2001596..c328b7ff8d234 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --copy-files/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --copy-files/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--out-dir", "lib", "--copy-files"]
+  "args": ["src", "--out-dir", "lib", "--copy-files", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --copy-files/stdout.txt b/packages/babel-cli/test/fixtures/babel/dir --out-dir --copy-files/stdout.txt
index 6ef9b7ad4df28..b690683b8428e 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --copy-files/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --copy-files/stdout.txt	
@@ -1 +1,2 @@
 src/foo.js -> lib/foo.js
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --keep-file-extension/options.json b/packages/babel-cli/test/fixtures/babel/dir --out-dir --keep-file-extension/options.json
index 887810a2b82c9..2a0df371e55eb 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --keep-file-extension/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --keep-file-extension/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--out-dir", "lib", "--keep-file-extension"]
+  "args": ["src", "--out-dir", "lib", "--keep-file-extension", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --keep-file-extension/stdout.txt b/packages/babel-cli/test/fixtures/babel/dir --out-dir --keep-file-extension/stdout.txt
index 9d19a99d25add..ab55e4731f6d2 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --keep-file-extension/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --keep-file-extension/stdout.txt	
@@ -1,2 +1,3 @@
 src/bar.mjs -> lib/bar.mjs
 src/foo.js -> lib/foo.js
+🎉  Successfully compiled 2 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --relative/options.json b/packages/babel-cli/test/fixtures/babel/dir --out-dir --relative/options.json
index a05b1cfc2e9ba..45b79c66e8109 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --relative/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --relative/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["**/src", "--out-dir", "../lib", "--relative"]
+  "args": ["**/src", "--out-dir", "../lib", "--relative", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --relative/stdout.txt b/packages/babel-cli/test/fixtures/babel/dir --out-dir --relative/stdout.txt
index 8215dd3c4ce65..ced29141cd942 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --relative/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --relative/stdout.txt	
@@ -2,3 +2,4 @@ package1/src/bar/bar1.js -> package1/lib/bar/bar1.js
 package1/src/foo1.js -> package1/lib/foo1.js
 package2/src/bar/bar2.js -> package2/lib/bar/bar2.js
 package2/src/foo2.js -> package2/lib/foo2.js
+🎉  Successfully compiled 4 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/options.json b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/options.json
index a8ab8839618bb..73170caecde00 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--source-maps", "inline", "--out-dir", "lib"]
+  "args": ["src", "--source-maps", "inline", "--out-dir", "lib", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/out-files/lib/bar/bar.js b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/out-files/lib/bar/bar.js
index 8216b06eeb6b8..7bc139ae8a2fa 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/out-files/lib/bar/bar.js	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/out-files/lib/bar/bar.js	
@@ -7,4 +7,4 @@ function _classCallCheck(instance, Constructor) { if (!_instanceof(instance, Con
 var Test = function Test() {
   _classCallCheck(this, Test);
 };
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIi4uLy4uL3NyYy9iYXIvYmFyLmpzIl0sIm5hbWVzIjpbIlRlc3QiXSwibWFwcGluZ3MiOiI7Ozs7OztJQUFNQSxJIiwiZmlsZSI6ImJhci5qcyIsInNvdXJjZXNDb250ZW50IjpbImNsYXNzIFRlc3Qge1xuXG59Il19
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIi4uLy4uL3NyYy9iYXIvYmFyLmpzIl0sIm5hbWVzIjpbIlRlc3QiXSwibWFwcGluZ3MiOiI7Ozs7OztJQUFNQSxJIiwic291cmNlc0NvbnRlbnQiOlsiY2xhc3MgVGVzdCB7XG5cbn0iXX0=
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/out-files/lib/foo.js b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/out-files/lib/foo.js
index 6439e69a2f219..a7df874e439c8 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/out-files/lib/foo.js	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/out-files/lib/foo.js	
@@ -3,4 +3,4 @@
 arr.map(function (x) {
   return x * MULTIPLIER;
 });
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIi4uL3NyYy9mb28uanMiXSwibmFtZXMiOlsiYXJyIiwibWFwIiwieCIsIk1VTFRJUExJRVIiXSwibWFwcGluZ3MiOiI7O0FBQUFBLElBQUlDLEdBQUosQ0FBUTtBQUFBLFNBQUtDLElBQUlDLFVBQVQ7QUFBQSxDQUFSIiwiZmlsZSI6ImZvby5qcyIsInNvdXJjZXNDb250ZW50IjpbImFyci5tYXAoeCA9PiB4ICogTVVMVElQTElFUik7Il19
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIi4uL3NyYy9mb28uanMiXSwibmFtZXMiOlsiYXJyIiwibWFwIiwieCIsIk1VTFRJUExJRVIiXSwibWFwcGluZ3MiOiI7O0FBQUFBLElBQUlDLEdBQUosQ0FBUTtBQUFBLFNBQUtDLElBQUlDLFVBQVQ7QUFBQSxDQUFSIiwic291cmNlc0NvbnRlbnQiOlsiYXJyLm1hcCh4ID0+IHggKiBNVUxUSVBMSUVSKTsiXX0=
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/stdout.txt b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/stdout.txt
index a3d53cf84adea..04928a9cbfed2 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps inline/stdout.txt	
@@ -1,2 +1,3 @@
 src/bar/bar.js -> lib/bar/bar.js
 src/foo.js -> lib/foo.js
+🎉  Successfully compiled 2 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/options.json b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/options.json
index e7e56fba3134f..682964ac91f89 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["src", "--source-maps", "--out-dir", "lib"]
+  "args": ["src", "--source-maps", "--out-dir", "lib", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/out-files/lib/bar/bar.js.map b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/out-files/lib/bar/bar.js.map
index a970cba9440cf..99078be50b8a3 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/out-files/lib/bar/bar.js.map	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/out-files/lib/bar/bar.js.map	
@@ -1 +1 @@
-{"version":3,"sources":["../../src/bar/bar.js"],"names":["Test"],"mappings":";;;;;;IAAMA,I","file":"bar.js","sourcesContent":["class Test {\n\n}"]}
+{"version":3,"sources":["../../src/bar/bar.js"],"names":["Test"],"mappings":";;;;;;IAAMA,I","sourcesContent":["class Test {\n\n}"],"file":"bar.js"}
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/out-files/lib/foo.js.map b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/out-files/lib/foo.js.map
index a97ad9e88f10c..595013088ca27 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/out-files/lib/foo.js.map	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/out-files/lib/foo.js.map	
@@ -1 +1 @@
-{"version":3,"sources":["../src/foo.js"],"names":["arr","map","x","MULTIPLIER"],"mappings":";;AAAAA,IAAIC,GAAJ,CAAQ;AAAA,SAAKC,IAAIC,UAAT;AAAA,CAAR","file":"foo.js","sourcesContent":["arr.map(x => x * MULTIPLIER);"]}
+{"version":3,"sources":["../src/foo.js"],"names":["arr","map","x","MULTIPLIER"],"mappings":";;AAAAA,IAAIC,GAAJ,CAAQ;AAAA,SAAKC,IAAIC,UAAT;AAAA,CAAR","sourcesContent":["arr.map(x => x * MULTIPLIER);"],"file":"foo.js"}
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/stdout.txt b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/stdout.txt
index a3d53cf84adea..04928a9cbfed2 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --source-maps/stdout.txt	
@@ -1,2 +1,3 @@
 src/bar/bar.js -> lib/bar/bar.js
 src/foo.js -> lib/foo.js
+🎉  Successfully compiled 2 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/in-files/src/bar/bar.js b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/in-files/src/bar/bar.js
new file mode 100644
index 0000000000000..45842c5e26744
--- /dev/null
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/in-files/src/bar/bar.js	
@@ -0,0 +1,3 @@
+class Test {
+
+}
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/in-files/src/foo.js b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/in-files/src/foo.js
new file mode 100644
index 0000000000000..4bc9539528d45
--- /dev/null
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/in-files/src/foo.js	
@@ -0,0 +1 @@
+arr.map(x => x * MULTIPLIER);
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/options.json b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/options.json
new file mode 100644
index 0000000000000..e9f6da4434450
--- /dev/null
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/options.json	
@@ -0,0 +1,3 @@
+{
+  "args": ["src", "--out-dir", "lib", "--verbose"]
+}
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/out-files/lib/bar/bar.js b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/out-files/lib/bar/bar.js
new file mode 100644
index 0000000000000..0381c2a965d90
--- /dev/null
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/out-files/lib/bar/bar.js	
@@ -0,0 +1,9 @@
+"use strict";
+
+function _instanceof(left, right) { if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) { return right[Symbol.hasInstance](left); } else { return left instanceof right; } }
+
+function _classCallCheck(instance, Constructor) { if (!_instanceof(instance, Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+var Test = function Test() {
+  _classCallCheck(this, Test);
+};
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/out-files/lib/foo.js b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/out-files/lib/foo.js
new file mode 100644
index 0000000000000..ae4557e57bc3d
--- /dev/null
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/out-files/lib/foo.js	
@@ -0,0 +1,5 @@
+"use strict";
+
+arr.map(function (x) {
+  return x * MULTIPLIER;
+});
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/stdout.txt b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/stdout.txt
new file mode 100644
index 0000000000000..04928a9cbfed2
--- /dev/null
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir --verbose/stdout.txt	
@@ -0,0 +1,3 @@
+src/bar/bar.js -> lib/bar/bar.js
+src/foo.js -> lib/foo.js
+🎉  Successfully compiled 2 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/dir --out-dir/stdout.txt b/packages/babel-cli/test/fixtures/babel/dir --out-dir/stdout.txt
index a3d53cf84adea..15992c65fdcef 100644
--- a/packages/babel-cli/test/fixtures/babel/dir --out-dir/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/dir --out-dir/stdout.txt	
@@ -1,2 +1 @@
-src/bar/bar.js -> lib/bar/bar.js
-src/foo.js -> lib/foo.js
+🎉  Successfully compiled 2 files with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/empty dir --out-dir/in-files/src/.gitkeep b/packages/babel-cli/test/fixtures/babel/empty dir --out-dir/in-files/src/.gitkeep
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/packages/babel-cli/test/fixtures/babel/empty dir --out-dir/options.json b/packages/babel-cli/test/fixtures/babel/empty dir --out-dir/options.json
new file mode 100644
index 0000000000000..0aeb1496b74ee
--- /dev/null
+++ b/packages/babel-cli/test/fixtures/babel/empty dir --out-dir/options.json	
@@ -0,0 +1,3 @@
+{
+  "args": ["src", "--out-dir", "lib"]
+}
diff --git a/packages/babel-cli/test/fixtures/babel/empty dir --out-dir/out-files/src/.gitkeep b/packages/babel-cli/test/fixtures/babel/empty dir --out-dir/out-files/src/.gitkeep
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/packages/babel-cli/test/fixtures/babel/empty dir --out-dir/stdout.txt b/packages/babel-cli/test/fixtures/babel/empty dir --out-dir/stdout.txt
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/packages/babel-cli/test/fixtures/babel/filename --out-dir --relative/options.json b/packages/babel-cli/test/fixtures/babel/filename --out-dir --relative/options.json
index c583027328b3f..c2fdbb1b69c0b 100644
--- a/packages/babel-cli/test/fixtures/babel/filename --out-dir --relative/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/filename --out-dir --relative/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["src/foo.js", "--out-dir", "../lib", "--relative"]
+  "args": ["src/foo.js", "--out-dir", "../lib", "--relative", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/filename --out-dir --relative/stdout.txt b/packages/babel-cli/test/fixtures/babel/filename --out-dir --relative/stdout.txt
index 6ef9b7ad4df28..b690683b8428e 100644
--- a/packages/babel-cli/test/fixtures/babel/filename --out-dir --relative/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/filename --out-dir --relative/stdout.txt	
@@ -1 +1,2 @@
 src/foo.js -> lib/foo.js
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/filename --out-dir/options.json b/packages/babel-cli/test/fixtures/babel/filename --out-dir/options.json
index bd4747099a411..f466c8dcceb59 100644
--- a/packages/babel-cli/test/fixtures/babel/filename --out-dir/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/filename --out-dir/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["src/foo.js", "--out-dir", "lib"]
+  "args": ["src/foo.js", "--out-dir", "lib", "--verbose"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/filename --out-dir/stdout.txt b/packages/babel-cli/test/fixtures/babel/filename --out-dir/stdout.txt
index 6ef9b7ad4df28..b690683b8428e 100644
--- a/packages/babel-cli/test/fixtures/babel/filename --out-dir/stdout.txt	
+++ b/packages/babel-cli/test/fixtures/babel/filename --out-dir/stdout.txt	
@@ -1 +1,2 @@
 src/foo.js -> lib/foo.js
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-cli/test/fixtures/babel/stdin --out-file/options.json b/packages/babel-cli/test/fixtures/babel/stdin --out-file/options.json
index 5c5b1a4baae88..7c157aa203bcd 100644
--- a/packages/babel-cli/test/fixtures/babel/stdin --out-file/options.json	
+++ b/packages/babel-cli/test/fixtures/babel/stdin --out-file/options.json	
@@ -1,3 +1,3 @@
 {
-  "args": ["--out-file", "script.js"]
+  "args": ["--out-file", "script.js", "-f", "file.js"]
 }
diff --git a/packages/babel-cli/test/fixtures/babel/stdin/options.json b/packages/babel-cli/test/fixtures/babel/stdin/options.json
new file mode 100644
index 0000000000000..a9f1532c7173a
--- /dev/null
+++ b/packages/babel-cli/test/fixtures/babel/stdin/options.json
@@ -0,0 +1,3 @@
+{
+  "args": ["-f", "file.js"]
+}
diff --git a/packages/babel-cli/test/index.js b/packages/babel-cli/test/index.js
index 83142accb5693..7fe80bc7feced 100644
--- a/packages/babel-cli/test/index.js
+++ b/packages/babel-cli/test/index.js
@@ -122,7 +122,13 @@ const buildTest = function(binName, testName, opts) {
   const binLoc = path.join(__dirname, "../lib", binName);
 
   return function(callback) {
-    clear();
+    const dir = process.cwd();
+
+    process.chdir(__dirname);
+    if (fs.existsSync(tmpLoc)) rimraf.sync(tmpLoc);
+    fs.mkdirSync(tmpLoc);
+    process.chdir(tmpLoc);
+
     saveInFiles(opts.inFiles);
 
     let args = [binLoc];
@@ -160,6 +166,7 @@ const buildTest = function(binName, testName, opts) {
           args.map(arg => `"${arg}"`).join(" ") + ": " + err.message;
       }
 
+      process.chdir(dir);
       callback(err);
     });
 
@@ -170,13 +177,6 @@ const buildTest = function(binName, testName, opts) {
   };
 };
 
-const clear = function() {
-  process.chdir(__dirname);
-  if (fs.existsSync(tmpLoc)) rimraf.sync(tmpLoc);
-  fs.mkdirSync(tmpLoc);
-  process.chdir(tmpLoc);
-};
-
 fs.readdirSync(fixtureLoc).forEach(function(binName) {
   if (binName[0] === ".") return;
 
diff --git a/packages/babel-code-frame/package.json b/packages/babel-code-frame/package.json
index 3f376522abb5e..58b486da085d7 100644
--- a/packages/babel-code-frame/package.json
+++ b/packages/babel-code-frame/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/code-frame",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Generate errors that contain a code frame that point to source locations.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,11 +8,10 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-code-frame",
   "main": "lib/index.js",
   "dependencies": {
-    "chalk": "^2.0.0",
-    "esutils": "^2.0.2",
-    "js-tokens": "^3.0.0"
+    "@babel/highlight": "7.0.0-beta.42"
   },
   "devDependencies": {
+    "chalk": "^2.0.0",
     "strip-ansi": "^4.0.0"
   }
 }
diff --git a/packages/babel-code-frame/src/index.js b/packages/babel-code-frame/src/index.js
index c8da91a5ae8c9..70237db65192f 100644
--- a/packages/babel-code-frame/src/index.js
+++ b/packages/babel-code-frame/src/index.js
@@ -1,6 +1,4 @@
-import jsTokens, { matchToToken } from "js-tokens";
-import esutils from "esutils";
-import Chalk from "chalk";
+import highlight, { shouldHighlight, getChalk } from "@babel/highlight";
 
 let deprecationWarningShown = false;
 
@@ -15,21 +13,10 @@ type NodeLocation = {
 };
 
 /**
- * Chalk styles for token types.
+ * Chalk styles for code frame token types.
  */
-
 function getDefs(chalk) {
   return {
-    keyword: chalk.cyan,
-    capitalized: chalk.yellow,
-    jsx_tag: chalk.yellow,
-    punctuator: chalk.yellow,
-    // bracket:  intentionally omitted.
-    number: chalk.magenta,
-    string: chalk.green,
-    regex: chalk.magenta,
-    comment: chalk.grey,
-    invalid: chalk.white.bgRed.bold,
     gutter: chalk.grey,
     marker: chalk.red.bold,
     message: chalk.red.bold,
@@ -42,76 +29,6 @@ function getDefs(chalk) {
 
 const NEWLINE = /\r\n|[\n\r\u2028\u2029]/;
 
-/**
- * RegExp to test for what seems to be a JSX tag name.
- */
-
-const JSX_TAG = /^[a-z][\w-]*$/i;
-
-/**
- * RegExp to test for the three types of brackets.
- */
-
-const BRACKET = /^[()[\]{}]$/;
-
-/**
- * Get the type of token, specifying punctuator type.
- */
-
-function getTokenType(match) {
-  const [offset, text] = match.slice(-2);
-  const token = matchToToken(match);
-
-  if (token.type === "name") {
-    if (esutils.keyword.isReservedWordES6(token.value)) {
-      return "keyword";
-    }
-
-    if (
-      JSX_TAG.test(token.value) &&
-      (text[offset - 1] === "<" || text.substr(offset - 2, 2) == "</")
-    ) {
-      return "jsx_tag";
-    }
-
-    if (token.value[0] !== token.value[0].toLowerCase()) {
-      return "capitalized";
-    }
-  }
-
-  if (token.type === "punctuator" && BRACKET.test(token.value)) {
-    return "bracket";
-  }
-
-  if (
-    token.type === "invalid" &&
-    (token.value === "@" || token.value === "#")
-  ) {
-    return "punctuator";
-  }
-
-  return token.type;
-}
-
-/**
- * Highlight `text`.
- */
-
-function highlight(defs: Object, text: string) {
-  return text.replace(jsTokens, function(...args) {
-    const type = getTokenType(args);
-    const colorize = defs[type];
-    if (colorize) {
-      return args[0]
-        .split(NEWLINE)
-        .map(str => colorize(str))
-        .join("\n");
-    } else {
-      return args[0];
-    }
-  });
-}
-
 /**
  * Extract what lines should be marked and highlighted.
  */
@@ -127,9 +44,7 @@ function getMarkerLines(
     loc.start,
   );
   const endLoc: Location = Object.assign({}, startLoc, loc.end);
-  const linesAbove = opts.linesAbove || 2;
-  const linesBelow = opts.linesBelow || 3;
-
+  const { linesAbove = 2, linesBelow = 3 } = opts || {};
   const startLine = startLoc.line;
   const startColumn = startLoc.column;
   const endLine = endLoc.line;
@@ -188,16 +103,13 @@ export function codeFrameColumns(
   opts: Object = {},
 ): string {
   const highlighted =
-    (opts.highlightCode && Chalk.supportsColor) || opts.forceColor;
-  let chalk = Chalk;
-  if (opts.forceColor) {
-    chalk = new Chalk.constructor({ enabled: true, level: 1 });
-  }
+    (opts.highlightCode || opts.forceColor) && shouldHighlight(opts);
+  const chalk = getChalk(opts);
+  const defs = getDefs(chalk);
   const maybeHighlight = (chalkFn, string) => {
     return highlighted ? chalkFn(string) : string;
   };
-  const defs = getDefs(chalk);
-  if (highlighted) rawLines = highlight(defs, rawLines);
+  if (highlighted) rawLines = highlight(rawLines, opts);
 
   const lines = rawLines.split(NEWLINE);
   const { start, end, markerLines } = getMarkerLines(loc, lines, opts);
@@ -268,15 +180,17 @@ export default function(
   if (!deprecationWarningShown) {
     deprecationWarningShown = true;
 
-    const deprecationError = new Error(
-      "Passing lineNumber and colNumber is deprecated to @babel/code-frame. Please use `codeFrameColumns`.",
-    );
-    deprecationError.name = "DeprecationWarning";
+    const message =
+      "Passing lineNumber and colNumber is deprecated to @babel/code-frame. Please use `codeFrameColumns`.";
 
     if (process.emitWarning) {
-      process.emitWarning(deprecationError);
+      // A string is directly supplied to emitWarning, because when supplying an
+      // Error object node throws in the tests because of different contexts
+      process.emitWarning(message, "DeprecationWarning");
     } else {
-      console.warn(deprecationError);
+      const deprecationError = new Error(message);
+      deprecationError.name = "DeprecationWarning";
+      console.warn(new Error(message));
     }
   }
 
diff --git a/packages/babel-code-frame/test/index.js b/packages/babel-code-frame/test/index.js
index 7f097ce77396a..c06214c5b4e52 100644
--- a/packages/babel-code-frame/test/index.js
+++ b/packages/babel-code-frame/test/index.js
@@ -1,13 +1,11 @@
-import assert from "assert";
 import chalk from "chalk";
 import stripAnsi from "strip-ansi";
 import codeFrame, { codeFrameColumns } from "..";
 
 describe("@babel/code-frame", function() {
-  it("basic usage", function() {
+  test("basic usage", function() {
     const rawLines = ["class Foo {", "  constructor()", "};"].join("\n");
-    assert.equal(
-      codeFrame(rawLines, 2, 16),
+    expect(codeFrame(rawLines, 2, 16)).toEqual(
       [
         "  1 | class Foo {",
         "> 2 |   constructor()",
@@ -17,15 +15,14 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("optional column number", function() {
+  test("optional column number", function() {
     const rawLines = ["class Foo {", "  constructor()", "};"].join("\n");
-    assert.equal(
-      codeFrame(rawLines, 2, null),
+    expect(codeFrame(rawLines, 2, null)).toEqual(
       ["  1 | class Foo {", "> 2 |   constructor()", "  3 | };"].join("\n"),
     );
   });
 
-  it("maximum context lines and padding", function() {
+  test("maximum context lines and padding", function() {
     const rawLines = [
       "/**",
       " * Sums two numbers.",
@@ -39,8 +36,7 @@ describe("@babel/code-frame", function() {
       "  return a + b",
       "}",
     ].join("\n");
-    assert.equal(
-      codeFrame(rawLines, 7, 2),
+    expect(codeFrame(rawLines, 7, 2)).toEqual(
       [
         "   5 |  * @param b Number",
         "   6 |  * @returns Number",
@@ -53,7 +49,7 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("no unnecessary padding due to one-off errors", function() {
+  test("no unnecessary padding due to one-off errors", function() {
     const rawLines = [
       "/**",
       " * Sums two numbers.",
@@ -67,8 +63,7 @@ describe("@babel/code-frame", function() {
       "  return a + b",
       "}",
     ].join("\n");
-    assert.equal(
-      codeFrame(rawLines, 6, 2),
+    expect(codeFrame(rawLines, 6, 2)).toEqual(
       [
         "  4 |  * @param a Number",
         "  5 |  * @param b Number",
@@ -81,14 +76,13 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("tabs", function() {
+  test("tabs", function() {
     const rawLines = [
       "\tclass Foo {",
       "\t  \t\t    constructor\t(\t)",
       "\t};",
     ].join("\n");
-    assert.equal(
-      codeFrame(rawLines, 2, 25),
+    expect(codeFrame(rawLines, 2, 25)).toEqual(
       [
         "  1 | \tclass Foo {",
         "> 2 | \t  \t\t    constructor\t(\t)",
@@ -98,18 +92,17 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("opts.highlightCode", function() {
+  test("opts.highlightCode", function() {
     const rawLines = "console.log('babel')";
     const result = codeFrame(rawLines, 1, 9, { highlightCode: true });
     const stripped = stripAnsi(result);
-    assert.ok(result.length > stripped.length);
-    assert.equal(
-      stripped,
+    expect(result.length).toBeGreaterThan(stripped.length);
+    expect(stripped).toEqual(
       ["> 1 | console.log('babel')", "    |         ^"].join("\n"),
     );
   });
 
-  it("opts.linesAbove", function() {
+  test("opts.linesAbove", function() {
     const rawLines = [
       "/**",
       " * Sums two numbers.",
@@ -123,8 +116,7 @@ describe("@babel/code-frame", function() {
       "  return a + b",
       "}",
     ].join("\n");
-    assert.equal(
-      codeFrame(rawLines, 7, 2, { linesAbove: 1 }),
+    expect(codeFrame(rawLines, 7, 2, { linesAbove: 1 })).toEqual(
       [
         "   6 |  * @returns Number",
         ">  7 |  */",
@@ -136,7 +128,7 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("opts.linesBelow", function() {
+  test("opts.linesBelow", function() {
     const rawLines = [
       "/**",
       " * Sums two numbers.",
@@ -150,8 +142,7 @@ describe("@babel/code-frame", function() {
       "  return a + b",
       "}",
     ].join("\n");
-    assert.equal(
-      codeFrame(rawLines, 7, 2, { linesBelow: 1 }),
+    expect(codeFrame(rawLines, 7, 2, { linesBelow: 1 })).toEqual(
       [
         "  5 |  * @param b Number",
         "  6 |  * @returns Number",
@@ -162,7 +153,7 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("opts.linesAbove and opts.linesBelow", function() {
+  test("opts.linesAbove and opts.linesBelow", function() {
     const rawLines = [
       "/**",
       " * Sums two numbers.",
@@ -176,25 +167,75 @@ describe("@babel/code-frame", function() {
       "  return a + b",
       "}",
     ].join("\n");
-    assert.equal(
-      codeFrame(rawLines, 7, 2, { linesAbove: 1, linesBelow: 1 }),
+    expect(codeFrame(rawLines, 7, 2, { linesAbove: 1, linesBelow: 1 })).toEqual(
       ["  6 |  * @returns Number", "> 7 |  */", "    |  ^", "  8 | "].join(
         "\n",
       ),
     );
   });
 
-  it("opts.forceColor", function() {
+  test("opts.linesAbove no lines above", function() {
+    const rawLines = [
+      "class Foo {",
+      "  constructor() {",
+      "    console.log(arguments);",
+      "  }",
+      "};",
+    ].join("\n");
+    expect(
+      codeFrameColumns(rawLines, { start: { line: 2 } }, { linesAbove: 0 }),
+    ).toEqual(
+      [
+        "> 2 |   constructor() {",
+        "  3 |     console.log(arguments);",
+        "  4 |   }",
+        "  5 | };",
+      ].join("\n"),
+    );
+  });
+
+  test("opts.linesBelow no lines below", function() {
+    const rawLines = [
+      "class Foo {",
+      "  constructor() {",
+      "    console.log(arguments);",
+      "  }",
+      "};",
+    ].join("\n");
+    expect(
+      codeFrameColumns(rawLines, { start: { line: 2 } }, { linesBelow: 0 }),
+    ).toEqual(["  1 | class Foo {", "> 2 |   constructor() {"].join("\n"));
+  });
+
+  test("opts.linesBelow single line", function() {
+    const rawLines = [
+      "class Foo {",
+      "  constructor() {",
+      "    console.log(arguments);",
+      "  }",
+      "};",
+    ].join("\n");
+    expect(
+      codeFrameColumns(
+        rawLines,
+        { start: { line: 2 } },
+        { linesAbove: 0, linesBelow: 0 },
+      ),
+    ).toEqual(["> 2 |   constructor() {"].join("\n"));
+  });
+
+  test("opts.forceColor", function() {
     const marker = chalk.red.bold;
     const gutter = chalk.grey;
 
     const rawLines = ["", "", "", ""].join("\n");
-    assert.equal(
+    expect(
       codeFrame(rawLines, 3, null, {
         linesAbove: 1,
         linesBelow: 1,
         forceColor: true,
       }),
+    ).toEqual(
       chalk.reset(
         [
           " " + gutter(" 2 | "),
@@ -205,10 +246,11 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("basic usage, new API", function() {
+  test("basic usage, new API", function() {
     const rawLines = ["class Foo {", "  constructor()", "};"].join("\n");
-    assert.equal(
+    expect(
       codeFrameColumns(rawLines, { start: { line: 2, column: 16 } }),
+    ).toEqual(
       [
         "  1 | class Foo {",
         "> 2 |   constructor()",
@@ -218,13 +260,14 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("mark multiple columns", function() {
+  test("mark multiple columns", function() {
     const rawLines = ["class Foo {", "  constructor()", "};"].join("\n");
-    assert.equal(
+    expect(
       codeFrameColumns(rawLines, {
         start: { line: 2, column: 3 },
         end: { line: 2, column: 16 },
       }),
+    ).toEqual(
       [
         "  1 | class Foo {",
         "> 2 |   constructor()",
@@ -234,15 +277,16 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("mark multiple columns across lines", function() {
+  test("mark multiple columns across lines", function() {
     const rawLines = ["class Foo {", "  constructor() {", "  }", "};"].join(
       "\n",
     );
-    assert.equal(
+    expect(
       codeFrameColumns(rawLines, {
         start: { line: 2, column: 17 },
         end: { line: 3, column: 3 },
       }),
+    ).toEqual(
       [
         "  1 | class Foo {",
         "> 2 |   constructor() {",
@@ -254,7 +298,7 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("mark multiple columns across multiple lines", function() {
+  test("mark multiple columns across multiple lines", function() {
     const rawLines = [
       "class Foo {",
       "  constructor() {",
@@ -262,11 +306,12 @@ describe("@babel/code-frame", function() {
       "  }",
       "};",
     ].join("\n");
-    assert.equal(
+    expect(
       codeFrameColumns(rawLines, {
         start: { line: 2, column: 17 },
         end: { line: 4, column: 3 },
       }),
+    ).toEqual(
       [
         "  1 | class Foo {",
         "> 2 |   constructor() {",
@@ -280,7 +325,7 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("mark across multiple lines without columns", function() {
+  test("mark across multiple lines without columns", function() {
     const rawLines = [
       "class Foo {",
       "  constructor() {",
@@ -288,8 +333,9 @@ describe("@babel/code-frame", function() {
       "  }",
       "};",
     ].join("\n");
-    assert.equal(
+    expect(
       codeFrameColumns(rawLines, { start: { line: 2 }, end: { line: 4 } }),
+    ).toEqual(
       [
         "  1 | class Foo {",
         "> 2 |   constructor() {",
@@ -300,9 +346,9 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("opts.message", function() {
+  test("opts.message", function() {
     const rawLines = ["class Foo {", "  constructor()", "};"].join("\n");
-    assert.equal(
+    expect(
       codeFrameColumns(
         rawLines,
         { start: { line: 2, column: 16 } },
@@ -310,6 +356,7 @@ describe("@babel/code-frame", function() {
           message: "Missing {",
         },
       ),
+    ).toEqual(
       [
         "  1 | class Foo {",
         "> 2 |   constructor()",
@@ -319,9 +366,9 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("opts.message without column", function() {
+  test("opts.message without column", function() {
     const rawLines = ["class Foo {", "  constructor()", "};"].join("\n");
-    assert.equal(
+    expect(
       codeFrameColumns(
         rawLines,
         { start: { line: 2 } },
@@ -329,6 +376,7 @@ describe("@babel/code-frame", function() {
           message: "Missing {",
         },
       ),
+    ).toEqual(
       [
         "  Missing {",
         "  1 | class Foo {",
@@ -338,7 +386,7 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("opts.message with multiple lines", function() {
+  test("opts.message with multiple lines", function() {
     const rawLines = [
       "class Foo {",
       "  constructor() {",
@@ -346,7 +394,7 @@ describe("@babel/code-frame", function() {
       "  }",
       "};",
     ].join("\n");
-    assert.equal(
+    expect(
       codeFrameColumns(
         rawLines,
         {
@@ -357,6 +405,7 @@ describe("@babel/code-frame", function() {
           message: "something about the constructor body",
         },
       ),
+    ).toEqual(
       [
         "  1 | class Foo {",
         "> 2 |   constructor() {",
@@ -370,7 +419,7 @@ describe("@babel/code-frame", function() {
     );
   });
 
-  it("opts.message with multiple lines without columns", function() {
+  test("opts.message with multiple lines without columns", function() {
     const rawLines = [
       "class Foo {",
       "  constructor() {",
@@ -378,7 +427,7 @@ describe("@babel/code-frame", function() {
       "  }",
       "};",
     ].join("\n");
-    assert.equal(
+    expect(
       codeFrameColumns(
         rawLines,
         { start: { line: 2 }, end: { line: 4 } },
@@ -386,6 +435,7 @@ describe("@babel/code-frame", function() {
           message: "something about the constructor body",
         },
       ),
+    ).toEqual(
       [
         "  something about the constructor body",
         "  1 | class Foo {",
diff --git a/packages/babel-core/README.md b/packages/babel-core/README.md
index 24262bec47d69..8814930519cde 100644
--- a/packages/babel-core/README.md
+++ b/packages/babel-core/README.md
@@ -93,7 +93,7 @@ babel.transformFileSync("filename.js", options).code;
 ```
 
 
-## babel.transformFromAst(ast: Object, code?: string, [options?](#options): Object, callback: Function)
+## babel.transformFromAst(ast: Object, code?: string, [options?](#options): Object, callback: Function): FileNode | null
 
 Given an [AST](https://astexplorer.net/), transform it.
 
@@ -123,6 +123,79 @@ const parsedAst = babylon.parse(sourceCode, { allowReturnOutsideFunction: true }
 const { code, map, ast } = babel.transformFromAstSync(parsedAst, sourceCode, options);
 ```
 
+## babel.parse(code: string, [options?](#options): Object)
+
+Given some code, parse it using Babel's standard behavior. Referenced presets and
+plugins will be loaded such that optional syntax plugins are automatically
+enabled.
+
+
+## Advanced APIs
+
+Many systems that wrap Babel like to automatically inject plugins and presets,
+or override options. To accomplish this goal, Babel exposes several functions
+that aid in loading the configuration part-way without transforming.
+
+### babel.loadOptions([options?](#options): Object)
+
+Resolve Babel's options fully, resulting in an options object where:
+
+* `opts.plugins` is a full list of `Plugin` instances.
+* `opts.presets` is empty and all presets are flattened into `opts`.
+* It can be safely passed back to Babel. Fields like `babelrc` have been set to 
+  false so that later calls to Babel will not make a second attempt to load
+  config files.
+
+`Plugin` instances aren't meant to be manipulated directly, but often
+callers will serialize this `opts` to JSON to use it as a cache key representing
+the options Babel has received. Caching on this isn't 100% guaranteed to
+invalidate properly, but it is the best we have at the moment.
+
+
+### babel.loadPartialConfig([options?](#options): Object): PartialConfig
+
+To allow systems to easily manipulate and validate a user's config, this function
+resolves the plugins and presets and proceeds no further. The expectation is
+that callers will take the config's `.options`, manipulate it as then see fit
+and pass it back to Babel again.
+
+* `babelrc: string | void` - The path of the `.babelrc` file, if there was one.
+* `babelignore: string | void` - The path of the `.babelignore` file, if there was one.
+* `options: ValidatedOptions` - The partially resolved options, which can be manipulated and passed back to Babel again.
+  * `plugins: Array<ConfigItem>` - See below.
+  * `presets: Array<ConfigItem>` - See below.
+  * It can be safely passed back to Babel. Fields like `babelrc` have been set
+    to false so that later calls to Babel will not make a second attempt to 
+    load config files.
+* `hasFilesystemConfig(): boolean` - Check if the resolved config loaded any settings from the filesystem.
+
+[`ConfigItem`](#configitem-type) instances expose properties to introspect the values, but each
+item should be treated as immutable. If changes are desired, the item should be
+removed from the list and replaced with either a normal Babel config value, or
+with a replacement item created by `babel.createConfigItem`. See that
+function for information about `ConfigItem` fields.
+
+
+### babel.createConfigItem(value: string | {} | Function | [string | {} | Function, {} | void], { dirname?: string, type?: "preset" | "plugin" }): ConfigItem
+
+Allows build tooling to create and cache config items up front. If this function
+is called multiple times for a given plugin, Babel will call the plugin's function itself
+multiple times. If you have a clear set of expected plugins and presets to
+inject, pre-constructing the config items would be recommended.
+
+
+### `ConfigItem` type
+
+Each `ConfigItem` exposes all of the information Babel knows. The fields are:
+
+* `value: {} | Function` - The resolved value of the plugin.
+* `options: {} | void` - The options object passed to the plugin.
+* `dirname: string` - The path that the options are relative to.
+* `name: string | void` - The name that the user gave the plugin instance, e.g. `plugins: [ ['env', {}, 'my-env'] ]` 
+* `file: Object | void` - Information about the plugin's file, if Babel knows it.
+  * `request: string` - The file that the user requested, e.g. `"@babel/env"`
+  * `resolved: string` - The full path of the resolved file, e.g. `"/tmp/node_modules/@babel/preset-env/lib/index.js"`
+
 
 ## Options
 
@@ -169,7 +242,6 @@ Following is a table of the options you can use:
 | `shouldPrintComment`     | `null`               | An optional callback that controls whether a comment should be output or not. Called as `shouldPrintComment(commentContents)`. **NOTE:** This overrides the `comment` option when used |
 | `sourceFileName`         | `(filenameRelative)` | Set `sources[0]` on returned source map |
 | `sourceMaps`             | `false`              | If truthy, adds a `map` property to returned output. If set to `"inline"`, a comment with a sourceMappingURL directive is added to the bottom of the returned code. If set to `"both"` then a `map` property is returned as well as a source map comment appended. **This does not emit sourcemap files by itself!** To have sourcemaps emitted using the CLI, you must pass it the `--source-maps` option |
-| `sourceMapTarget`        | `(filenameRelative)` | Set `file` on returned source map |
 | `sourceRoot`             | `(moduleRoot)`       | The root from which all sources are relative |
 | `sourceType`             | `"module"`           | Indicate the mode the code should be parsed in. Can be one of "script", "module", or "unambiguous". `"unambiguous"` will make Babel attempt to _guess_, based on the presence of ES6 `import` or `export` statements. Files with ES6 `import`s and `export`s are considered `"module"` and are otherwise `"script"`. |
 | `wrapPluginVisitorMethod`| `null`               | An optional callback that can be used to wrap visitor methods. **NOTE:** This is useful for things like introspection, and not really needed for implementing anything. Called as `wrapPluginVisitorMethod(pluginAlias, visitorType, callback)`.
diff --git a/packages/babel-core/package.json b/packages/babel-core/package.json
index d7cd127d161c4..c282d6e681847 100644
--- a/packages/babel-core/package.json
+++ b/packages/babel-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/core",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel compiler core.",
   "main": "./lib/index.js",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
@@ -28,23 +28,24 @@
     "./lib/transform-file-sync.js": "./lib/transform-file-sync-browser.js"
   },
   "dependencies": {
-    "@babel/code-frame": "7.0.0-beta.39",
-    "@babel/generator": "7.0.0-beta.39",
-    "@babel/helpers": "7.0.0-beta.39",
-    "@babel/template": "7.0.0-beta.39",
-    "@babel/traverse": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39",
-    "babylon": "7.0.0-beta.39",
+    "@babel/code-frame": "7.0.0-beta.42",
+    "@babel/generator": "7.0.0-beta.42",
+    "@babel/helpers": "7.0.0-beta.42",
+    "@babel/template": "7.0.0-beta.42",
+    "@babel/traverse": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42",
+    "babylon": "7.0.0-beta.42",
     "convert-source-map": "^1.1.0",
-    "debug": "^3.0.1",
+    "debug": "^3.1.0",
     "json5": "^0.5.0",
     "lodash": "^4.2.0",
     "micromatch": "^2.3.11",
     "resolve": "^1.3.2",
+    "semver": "^5.4.1",
     "source-map": "^0.5.0"
   },
   "devDependencies": {
-    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.39",
-    "@babel/register": "7.0.0-beta.39"
+    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.42",
+    "@babel/register": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-core/src/config/caching.js b/packages/babel-core/src/config/caching.js
index b9703560b54e1..7c3a28bda215e 100644
--- a/packages/babel-core/src/config/caching.js
+++ b/packages/babel-core/src/config/caching.js
@@ -1,6 +1,6 @@
 // @flow
 
-type SimpleCacheConfigurator = SimpleCacheConfiguratorFn &
+export type SimpleCacheConfigurator = SimpleCacheConfiguratorFn &
   SimpleCacheConfiguratorObj;
 
 type SimpleCacheConfiguratorFn = {
diff --git a/packages/babel-core/src/config/config-chain.js b/packages/babel-core/src/config/config-chain.js
index 60e062d3f8f84..cf0e3eaf017d0 100644
--- a/packages/babel-core/src/config/config-chain.js
+++ b/packages/babel-core/src/config/config-chain.js
@@ -13,10 +13,10 @@ import {
 const debug = buildDebug("babel:config:config-chain");
 
 import {
-  findBabelrc,
-  findBabelignore,
+  findRelativeConfig,
   loadConfig,
   type ConfigFile,
+  type IgnoreFile,
 } from "./files";
 
 import { makeWeakCache, makeStrongCache } from "./caching";
@@ -104,14 +104,18 @@ const loadPresetOverridesEnvDescriptors = makeWeakCache(
     ),
 );
 
+export type RootConfigChain = ConfigChain & {
+  babelrc: ConfigFile | void,
+  ignore: IgnoreFile | void,
+};
+
 /**
  * Build a config chain for Babel's full root configuration.
  */
 export function buildRootChain(
-  cwd: string,
   opts: ValidatedOptions,
   context: ConfigContext,
-): ConfigChain | null {
+): RootConfigChain | null {
   const programmaticChain = loadProgrammaticChain(
     {
       options: opts,
@@ -121,26 +125,24 @@ export function buildRootChain(
   );
   if (!programmaticChain) return null;
 
+  let ignore, babelrc;
+
   const fileChain = emptyChain();
   // resolve all .babelrc files
   if (opts.babelrc !== false && context.filename !== null) {
     const filename = context.filename;
-    const babelignoreFile = findBabelignore(filename);
-    if (
-      babelignoreFile &&
-      shouldIgnore(
-        context,
-        babelignoreFile.ignore,
-        null,
-        babelignoreFile.dirname,
-      )
-    ) {
+
+    ({ ignore, config: babelrc } = findRelativeConfig(
+      filename,
+      context.envName,
+    ));
+
+    if (ignore && shouldIgnore(context, ignore.ignore, null, ignore.dirname)) {
       return null;
     }
 
-    const babelrcFile = findBabelrc(filename, context.envName);
-    if (babelrcFile) {
-      const result = loadFileChain(babelrcFile, context);
+    if (babelrc) {
+      const result = loadFileChain(babelrc, context);
       if (!result) return null;
 
       mergeChain(fileChain, result);
@@ -158,6 +160,8 @@ export function buildRootChain(
     plugins: dedupDescriptors(chain.plugins),
     presets: dedupDescriptors(chain.presets),
     options: chain.options.map(o => normalizeOptions(o)),
+    ignore: ignore || undefined,
+    babelrc: babelrc || undefined,
   };
 }
 
diff --git a/packages/babel-core/src/config/config-descriptors.js b/packages/babel-core/src/config/config-descriptors.js
index 6b31c640d2aed..d5bf311149d91 100644
--- a/packages/babel-core/src/config/config-descriptors.js
+++ b/packages/babel-core/src/config/config-descriptors.js
@@ -2,6 +2,8 @@
 
 import { loadPlugin, loadPreset } from "./files";
 
+import { getItemDescriptor } from "./item";
+
 import {
   makeWeakCache,
   makeStrongCache,
@@ -33,6 +35,10 @@ export type UnloadedDescriptor = {
   dirname: string,
   alias: string,
   ownPass?: boolean,
+  file?: {
+    request: string,
+    resolved: string,
+  } | void,
 };
 
 export type ValidatedFile = {
@@ -152,16 +158,11 @@ function createDescriptors(
   ownPass?: boolean,
 ): Array<UnloadedDescriptor> {
   const descriptors = items.map((item, index) =>
-    createDescriptor(
-      item,
-      type === "plugin" ? loadPlugin : loadPreset,
-      dirname,
-      {
-        index,
-        alias,
-        ownPass: !!ownPass,
-      },
-    ),
+    createDescriptor(item, dirname, {
+      type,
+      alias: `${alias}$${index}`,
+      ownPass: !!ownPass,
+    }),
   );
 
   assertNoDuplicates(descriptors);
@@ -172,20 +173,24 @@ function createDescriptors(
 /**
  * Given a plugin/preset item, resolve it into a standard format.
  */
-function createDescriptor(
+export function createDescriptor(
   pair: PluginItem,
-  resolver,
-  dirname,
+  dirname: string,
   {
-    index,
+    type,
     alias,
     ownPass,
   }: {
-    index: number,
+    type?: "plugin" | "preset",
     alias: string,
     ownPass?: boolean,
   },
 ): UnloadedDescriptor {
+  const desc = getItemDescriptor(pair);
+  if (desc) {
+    return desc;
+  }
+
   let name;
   let options;
   let value = pair;
@@ -198,9 +203,23 @@ function createDescriptor(
     }
   }
 
+  let file = undefined;
   let filepath = null;
   if (typeof value === "string") {
+    if (typeof type !== "string") {
+      throw new Error(
+        "To resolve a string-based item, the type of item must be given",
+      );
+    }
+    const resolver = type === "plugin" ? loadPlugin : loadPreset;
+    const request = value;
+
     ({ filepath, value } = resolver(value, dirname));
+
+    file = {
+      request,
+      resolved: filepath,
+    };
   }
 
   if (!value) {
@@ -226,17 +245,18 @@ function createDescriptor(
     // config object, because it can be useful to define them in nested
     // configuration contexts.
     throw new Error(
-      "Plugin/Preset files are not allowed to export objects, only functions.",
+      `Plugin/Preset files are not allowed to export objects, only functions. In ${filepath}`,
     );
   }
 
   return {
     name,
-    alias: filepath || `${alias}$${index}`,
+    alias: filepath || alias,
     value,
     options,
     dirname,
     ownPass,
+    file,
   };
 }
 
diff --git a/packages/babel-core/src/config/files/configuration.js b/packages/babel-core/src/config/files/configuration.js
index 5617f3e4738b6..c1a55cc598538 100644
--- a/packages/babel-core/src/config/files/configuration.js
+++ b/packages/babel-core/src/config/files/configuration.js
@@ -6,6 +6,7 @@ import fs from "fs";
 import json5 from "json5";
 import resolve from "resolve";
 import { makeStrongCache, type CacheConfigurator } from "../caching";
+import makeAPI from "../helpers/config-api";
 
 const debug = buildDebug("babel:config:loading:files:configuration");
 
@@ -21,61 +22,58 @@ export type IgnoreFile = {
   ignore: Array<string>,
 };
 
+export type RelativeConfig = {
+  config: ConfigFile | null,
+  ignore: IgnoreFile | null,
+};
+
 const BABELRC_FILENAME = ".babelrc";
 const BABELRC_JS_FILENAME = ".babelrc.js";
 const PACKAGE_FILENAME = "package.json";
 const BABELIGNORE_FILENAME = ".babelignore";
 
-export function findBabelrc(
+export function findRelativeConfig(
   filepath: string,
   envName: string,
-): ConfigFile | null {
+): RelativeConfig {
+  let config = null;
+  let ignore = null;
+
   const dirname = path.dirname(filepath);
   let loc = dirname;
   while (true) {
-    const conf = [
-      BABELRC_FILENAME,
-      BABELRC_JS_FILENAME,
-      PACKAGE_FILENAME,
-    ].reduce((previousConfig: ConfigFile | null, name) => {
-      const filepath = path.join(loc, name);
-      const config = readConfig(filepath, envName);
-
-      if (config && previousConfig) {
-        throw new Error(
-          `Multiple configuration files found. Please remove one:\n` +
-            ` - ${path.basename(previousConfig.filepath)}\n` +
-            ` - ${name}\n` +
-            `from ${loc}`,
-        );
-      }
-
-      return config || previousConfig;
-    }, null);
+    if (!config) {
+      config = [BABELRC_FILENAME, BABELRC_JS_FILENAME, PACKAGE_FILENAME].reduce(
+        (previousConfig: ConfigFile | null, name) => {
+          const filepath = path.join(loc, name);
+          const config = readConfig(filepath, envName);
+
+          if (config && previousConfig) {
+            throw new Error(
+              `Multiple configuration files found. Please remove one:\n` +
+                ` - ${path.basename(previousConfig.filepath)}\n` +
+                ` - ${name}\n` +
+                `from ${loc}`,
+            );
+          }
+
+          return config || previousConfig;
+        },
+        null,
+      );
 
-    if (conf) {
-      debug("Found configuration %o from %o.", conf.filepath, dirname);
-      return conf;
+      if (config) {
+        debug("Found configuration %o from %o.", config.filepath, dirname);
+      }
     }
 
-    const nextLoc = path.dirname(loc);
-    if (loc === nextLoc) break;
-    loc = nextLoc;
-  }
-
-  return null;
-}
-
-export function findBabelignore(filepath: string): IgnoreFile | null {
-  const dirname = path.dirname(filepath);
-  let loc = dirname;
-  while (true) {
-    const ignoreLoc = path.join(loc, BABELIGNORE_FILENAME);
-    const ignore = readIgnoreConfig(ignoreLoc);
+    if (!ignore) {
+      const ignoreLoc = path.join(loc, BABELIGNORE_FILENAME);
+      ignore = readIgnoreConfig(ignoreLoc);
 
-    if (ignore) {
-      debug("Found ignore %o from %o.", ignore.filepath, dirname);
-      return ignore;
+      if (ignore) {
+        debug("Found ignore %o from %o.", ignore.filepath, dirname);
+      }
     }
 
     const nextLoc = path.dirname(loc);
@@ -83,7 +81,7 @@ export function findBabelignore(filepath: string): IgnoreFile | null {
     loc = nextLoc;
   }
 
-  return null;
+  return { config, ignore };
 }
 
 export function loadConfig(
@@ -106,7 +104,7 @@ export function loadConfig(
  * Read the given config file, returning the result. Returns null if no config was found, but will
  * throw if there are parsing errors while loading a config.
  */
-function readConfig(filepath, envName) {
+function readConfig(filepath, envName): ConfigFile | null {
   return path.extname(filepath) === ".js"
     ? readConfigJS(filepath, { envName })
     : readConfigFile(filepath);
@@ -153,12 +151,7 @@ const readConfigJS = makeStrongCache(
     }
 
     if (typeof options === "function") {
-      options = options({
-        cache: cache.simple(),
-        // Expose ".env()" so people can easily get the same env that we expose using the "env" key.
-        env: () => cache.using(data => data.envName),
-        async: () => false,
-      });
+      options = options(makeAPI(cache));
 
       if (!cache.configured()) throwConfigError();
     }
diff --git a/packages/babel-core/src/config/files/index-browser.js b/packages/babel-core/src/config/files/index-browser.js
index bcd6b439a029f..4e5cb5fe62189 100644
--- a/packages/babel-core/src/config/files/index-browser.js
+++ b/packages/babel-core/src/config/files/index-browser.js
@@ -1,27 +1,14 @@
 // @flow
 
-export type ConfigFile = {
-  filepath: string,
-  dirname: string,
-  options: {},
-};
+import type { ConfigFile, IgnoreFile, RelativeConfig } from "./configuration";
 
-export type IgnoreFile = {
-  filepath: string,
-  dirname: string,
-  ignore: Array<string>,
-};
+export type { ConfigFile, IgnoreFile, RelativeConfig };
 
-export function findBabelrc(
+export function findRelativeConfig(
   filepath: string,
   envName: string, // eslint-disable-line no-unused-vars
-): ConfigFile | null {
-  return null;
-}
-
-// eslint-disable-next-line no-unused-vars
-export function findBabelignore(filepath: string): IgnoreFile | null {
-  return null;
+): RelativeConfig {
+  return { config: null, ignore: null };
 }
 
 export function loadConfig(name: string, dirname: string): ConfigFile {
diff --git a/packages/babel-core/src/config/full.js b/packages/babel-core/src/config/full.js
new file mode 100644
index 0000000000000..0ae4ade63bc8c
--- /dev/null
+++ b/packages/babel-core/src/config/full.js
@@ -0,0 +1,299 @@
+// @flow
+
+import { mergeOptions } from "./util";
+import * as context from "../index";
+import Plugin from "./plugin";
+import { getItemDescriptor } from "./item";
+import {
+  buildPresetChain,
+  type ConfigContext,
+  type ConfigChain,
+  type PresetInstance,
+} from "./config-chain";
+import type { UnloadedDescriptor } from "./config-descriptors";
+import traverse from "@babel/traverse";
+import { makeWeakCache, type CacheConfigurator } from "./caching";
+import { validate } from "./validation/options";
+import { validatePluginObject } from "./validation/plugins";
+import makeAPI from "./helpers/config-api";
+
+import loadPrivatePartialConfig from "./partial";
+
+type LoadedDescriptor = {
+  value: {},
+  options: {},
+  dirname: string,
+  alias: string,
+};
+
+export type { InputOptions } from "./validation/options";
+
+export type ResolvedConfig = {
+  options: Object,
+  passes: PluginPasses,
+};
+
+export type { Plugin };
+export type PluginPassList = Array<Plugin>;
+export type PluginPasses = Array<PluginPassList>;
+
+// Context not including filename since it is used in places that cannot
+// process 'ignore'/'only' and other filename-based logic.
+type SimpleContext = {
+  envName: string,
+};
+
+export default function loadFullConfig(
+  inputOpts: mixed,
+): ResolvedConfig | null {
+  const result = loadPrivatePartialConfig(inputOpts);
+  if (!result) {
+    return null;
+  }
+  const { options, context } = result;
+
+  const optionDefaults = {};
+  const passes = [[]];
+  try {
+    const { plugins, presets } = options;
+
+    if (!plugins || !presets) {
+      throw new Error("Assertion failure - plugins and presets exist");
+    }
+
+    const ignored = (function recurseDescriptors(
+      config: {
+        plugins: Array<UnloadedDescriptor>,
+        presets: Array<UnloadedDescriptor>,
+      },
+      pass: Array<Plugin>,
+    ) {
+      const plugins = config.plugins.map(descriptor => {
+        return loadPluginDescriptor(descriptor, context);
+      });
+      const presets = config.presets.map(descriptor => {
+        return {
+          preset: loadPresetDescriptor(descriptor, context),
+          pass: descriptor.ownPass ? [] : pass,
+        };
+      });
+
+      // resolve presets
+      if (presets.length > 0) {
+        // The passes are created in the same order as the preset list, but are inserted before any
+        // existing additional passes.
+        passes.splice(
+          1,
+          0,
+          ...presets.map(o => o.pass).filter(p => p !== pass),
+        );
+
+        for (const { preset, pass } of presets) {
+          if (!preset) return true;
+
+          const ignored = recurseDescriptors(
+            {
+              plugins: preset.plugins,
+              presets: preset.presets,
+            },
+            pass,
+          );
+          if (ignored) return true;
+
+          preset.options.forEach(opts => {
+            mergeOptions(optionDefaults, opts);
+          });
+        }
+      }
+
+      // resolve plugins
+      if (plugins.length > 0) {
+        pass.unshift(...plugins);
+      }
+    })(
+      {
+        plugins: plugins.map(item => {
+          const desc = getItemDescriptor(item);
+          if (!desc) {
+            throw new Error("Assertion failure - must be config item");
+          }
+
+          return desc;
+        }),
+        presets: presets.map(item => {
+          const desc = getItemDescriptor(item);
+          if (!desc) {
+            throw new Error("Assertion failure - must be config item");
+          }
+
+          return desc;
+        }),
+      },
+      passes[0],
+    );
+
+    if (ignored) return null;
+  } catch (e) {
+    // There are a few case where thrown errors will try to annotate themselves multiple times, so
+    // to keep things simple we just bail out if re-wrapping the message.
+    if (!/^\[BABEL\]/.test(e.message)) {
+      e.message = `[BABEL] ${context.filename || "unknown"}: ${e.message}`;
+    }
+
+    throw e;
+  }
+
+  const opts: Object = optionDefaults;
+  mergeOptions(opts, options);
+
+  opts.plugins = passes[0];
+  opts.presets = passes
+    .slice(1)
+    .filter(plugins => plugins.length > 0)
+    .map(plugins => ({ plugins }));
+  opts.passPerPreset = opts.presets.length > 0;
+
+  return {
+    options: opts,
+    passes: passes,
+  };
+}
+
+/**
+ * Load a generic plugin/preset from the given descriptor loaded from the config object.
+ */
+const loadDescriptor = makeWeakCache(
+  (
+    { value, options, dirname, alias }: UnloadedDescriptor,
+    cache: CacheConfigurator<SimpleContext>,
+  ): LoadedDescriptor => {
+    // Disabled presets should already have been filtered out
+    if (options === false) throw new Error("Assertion failure");
+
+    options = options || {};
+
+    let item = value;
+    if (typeof value === "function") {
+      const api = Object.assign({}, context, makeAPI(cache));
+      try {
+        item = value(api, options, dirname);
+      } catch (e) {
+        if (alias) {
+          e.message += ` (While processing: ${JSON.stringify(alias)})`;
+        }
+        throw e;
+      }
+    }
+
+    if (!item || typeof item !== "object") {
+      throw new Error("Plugin/Preset did not return an object.");
+    }
+
+    if (typeof item.then === "function") {
+      throw new Error(
+        `You appear to be using an async plugin, ` +
+          `which your current version of Babel does not support.` +
+          `If you're using a published plugin, ` +
+          `you may need to upgrade your @babel/core version.`,
+      );
+    }
+
+    return { value: item, options, dirname, alias };
+  },
+);
+
+/**
+ * Instantiate a plugin for the given descriptor, returning the plugin/options pair.
+ */
+function loadPluginDescriptor(
+  descriptor: UnloadedDescriptor,
+  context: SimpleContext,
+): Plugin {
+  if (descriptor.value instanceof Plugin) {
+    if (descriptor.options) {
+      throw new Error(
+        "Passed options to an existing Plugin instance will not work.",
+      );
+    }
+
+    return descriptor.value;
+  }
+
+  return instantiatePlugin(loadDescriptor(descriptor, context), context);
+}
+
+const instantiatePlugin = makeWeakCache(
+  (
+    { value, options, dirname, alias }: LoadedDescriptor,
+    cache: CacheConfigurator<SimpleContext>,
+  ): Plugin => {
+    const pluginObj = validatePluginObject(value);
+
+    const plugin = Object.assign({}, pluginObj);
+    if (plugin.visitor) {
+      plugin.visitor = traverse.explode(Object.assign({}, plugin.visitor));
+    }
+
+    if (plugin.inherits) {
+      const inheritsDescriptor = {
+        name: undefined,
+        alias: `${alias}$inherits`,
+        value: plugin.inherits,
+        options,
+        dirname,
+      };
+
+      // If the inherited plugin changes, reinstantiate this plugin.
+      const inherits = cache.invalidate(data =>
+        loadPluginDescriptor(inheritsDescriptor, data),
+      );
+
+      plugin.pre = chain(inherits.pre, plugin.pre);
+      plugin.post = chain(inherits.post, plugin.post);
+      plugin.manipulateOptions = chain(
+        inherits.manipulateOptions,
+        plugin.manipulateOptions,
+      );
+      plugin.visitor = traverse.visitors.merge([
+        inherits.visitor || {},
+        plugin.visitor || {},
+      ]);
+    }
+
+    return new Plugin(plugin, options, alias);
+  },
+);
+
+/**
+ * Generate a config object that will act as the root of a new nested config.
+ */
+const loadPresetDescriptor = (
+  descriptor: UnloadedDescriptor,
+  context: ConfigContext,
+): ConfigChain | null => {
+  return buildPresetChain(
+    instantiatePreset(loadDescriptor(descriptor, context)),
+    context,
+  );
+};
+
+const instantiatePreset = makeWeakCache(
+  ({ value, dirname, alias }: LoadedDescriptor): PresetInstance => {
+    return {
+      options: validate("preset", value),
+      alias,
+      dirname,
+    };
+  },
+);
+
+function chain(a, b) {
+  const fns = [a, b].filter(Boolean);
+  if (fns.length <= 1) return fns[0];
+
+  return function(...args) {
+    for (const fn of fns) {
+      fn.apply(this, args);
+    }
+  };
+}
diff --git a/packages/babel-core/src/config/helpers/config-api.js b/packages/babel-core/src/config/helpers/config-api.js
new file mode 100644
index 0000000000000..da14c22eebf51
--- /dev/null
+++ b/packages/babel-core/src/config/helpers/config-api.js
@@ -0,0 +1,91 @@
+// @flow
+
+import semver from "semver";
+import { version as coreVersion } from "../../";
+import type { CacheConfigurator, SimpleCacheConfigurator } from "../caching";
+
+type EnvFunction = {
+  (): string,
+  <T>((string) => T): T,
+  (string): boolean,
+  (Array<string>): boolean,
+};
+
+export type PluginAPI = {
+  version: string,
+  cache: SimpleCacheConfigurator,
+  env: EnvFunction,
+  async: () => boolean,
+  assertVersion: typeof assertVersion,
+};
+
+export default function makeAPI(
+  cache: CacheConfigurator<{ envName: string }>,
+): PluginAPI {
+  const env: any = value =>
+    cache.using(data => {
+      if (typeof value === "undefined") return data.envName;
+      if (typeof value === "function") return value(data.envName);
+      if (!Array.isArray(value)) value = [value];
+
+      return value.some(entry => {
+        if (typeof entry !== "string") {
+          throw new Error("Unexpected non-string value");
+        }
+        return entry === data.envName;
+      });
+    });
+
+  return {
+    version: coreVersion,
+    cache: cache.simple(),
+    // Expose ".env()" so people can easily get the same env that we expose using the "env" key.
+    env,
+    async: () => false,
+    assertVersion,
+  };
+}
+
+function assertVersion(range: string | number): void {
+  if (typeof range === "number") {
+    if (!Number.isInteger(range)) {
+      throw new Error("Expected string or integer value.");
+    }
+    range = `^${range}.0.0-0`;
+  }
+  if (typeof range !== "string") {
+    throw new Error("Expected string or integer value.");
+  }
+
+  if (semver.satisfies(coreVersion, range)) return;
+
+  const limit = Error.stackTraceLimit;
+
+  if (typeof limit === "number" && limit < 25) {
+    // Bump up the limit if needed so that users are more likely
+    // to be able to see what is calling Babel.
+    Error.stackTraceLimit = 25;
+  }
+
+  const err = new Error(
+    `Requires Babel "${range}", but was loaded with "${coreVersion}". ` +
+      `If you are sure you have a compatible version of @babel/core, ` +
+      `it is likely that something in your build process is loading the ` +
+      `wrong version. Inspect the stack trace of this error to look for ` +
+      `the first entry that doesn't mention "@babel/core" or "babel-core" ` +
+      `to see what is calling Babel.`,
+  );
+
+  if (typeof limit === "number") {
+    Error.stackTraceLimit = limit;
+  }
+
+  throw Object.assign(
+    err,
+    ({
+      code: "BABEL_VERSION_UNSUPPORTED",
+      version: coreVersion,
+      range,
+    }: any),
+  );
+}
diff --git a/packages/babel-core/src/config/index.js b/packages/babel-core/src/config/index.js
index 6a770e5aca314..734855c7bb24e 100644
--- a/packages/babel-core/src/config/index.js
+++ b/packages/babel-core/src/config/index.js
@@ -1,306 +1,26 @@
 // @flow
 
-import path from "path";
-import * as context from "../index";
-import Plugin from "./plugin";
-import merge from "lodash/merge";
-import {
-  buildRootChain,
-  buildPresetChain,
-  type ConfigContext,
-  type ConfigChain,
-  type PresetInstance,
-} from "./config-chain";
-import type { UnloadedDescriptor } from "./config-descriptors";
-import traverse from "@babel/traverse";
-import clone from "lodash/clone";
-import { makeWeakCache, type CacheConfigurator } from "./caching";
-import { getEnv } from "./helpers/environment";
-import { validate } from "./validation/options";
-import { validatePluginObject } from "./validation/plugins";
-
-type LoadedDescriptor = {
-  value: {},
-  options: {},
-  dirname: string,
-  alias: string,
-};
-
-export type { InputOptions } from "./validation/options";
-
-export type ResolvedConfig = {
-  options: Object,
-  passes: PluginPasses,
-};
-
-export type { Plugin };
-export type PluginPassList = Array<Plugin>;
-export type PluginPasses = Array<PluginPassList>;
-
-// Context not including filename since it is used in places that cannot
-// process 'ignore'/'only' and other filename-based logic.
-type SimpleContext = {
-  envName: string,
-};
-
-export default function loadConfig(inputOpts: mixed): ResolvedConfig | null {
-  if (
-    inputOpts != null &&
-    (typeof inputOpts !== "object" || Array.isArray(inputOpts))
-  ) {
-    throw new Error("Babel options must be an object, null, or undefined");
-  }
-
-  const args = inputOpts ? validate("arguments", inputOpts) : {};
-
-  const { envName = getEnv(), cwd = "." } = args;
-  const absoluteCwd = path.resolve(cwd);
-
-  const context: ConfigContext = {
-    filename: args.filename ? path.resolve(cwd, args.filename) : null,
-    cwd: absoluteCwd,
-    envName,
-  };
-
-  const configChain = buildRootChain(absoluteCwd, args, context);
-  if (!configChain) return null;
-
-  const optionDefaults = {};
-  const options = {};
-  const passes = [[]];
-  try {
-    const ignored = (function recurseDescriptors(
-      config: {
-        plugins: Array<UnloadedDescriptor>,
-        presets: Array<UnloadedDescriptor>,
-      },
-      pass: Array<Plugin>,
-    ) {
-      const plugins = config.plugins.map(descriptor =>
-        loadPluginDescriptor(descriptor, context),
-      );
-      const presets = config.presets.map(descriptor => {
-        return {
-          preset: loadPresetDescriptor(descriptor, context),
-          pass: descriptor.ownPass ? [] : pass,
-        };
-      });
-
-      // resolve presets
-      if (presets.length > 0) {
-        // The passes are created in the same order as the preset list, but are inserted before any
-        // existing additional passes.
-        passes.splice(
-          1,
-          0,
-          ...presets.map(o => o.pass).filter(p => p !== pass),
-        );
-
-        for (const { preset, pass } of presets) {
-          if (!preset) return true;
-
-          const ignored = recurseDescriptors(
-            {
-              plugins: preset.plugins,
-              presets: preset.presets,
-            },
-            pass,
-          );
-          if (ignored) return true;
-
-          preset.options.forEach(opts => {
-            merge(optionDefaults, opts);
-          });
-        }
-      }
-
-      // resolve plugins
-      if (plugins.length > 0) {
-        pass.unshift(...plugins);
-      }
-    })(
-      {
-        plugins: configChain.plugins,
-        presets: configChain.presets,
-      },
-      passes[0],
-    );
-
-    if (ignored) return null;
-
-    configChain.options.forEach(opts => {
-      merge(options, opts);
-    });
-  } catch (e) {
-    // There are a few case where thrown errors will try to annotate themselves multiple times, so
-    // to keep things simple we just bail out if re-wrapping the message.
-    if (!/^\[BABEL\]/.test(e.message)) {
-      e.message = `[BABEL] ${args.filename || "unknown"}: ${e.message}`;
-    }
-
-    throw e;
-  }
-
-  const opts: Object = merge(optionDefaults, options);
-
-  // Tack the passes onto the object itself so that, if this object is passed back to Babel a second time,
-  // it will be in the right structure to not change behavior.
-  opts.babelrc = false;
-  opts.plugins = passes[0];
-  opts.presets = passes
-    .slice(1)
-    .filter(plugins => plugins.length > 0)
-    .map(plugins => ({ plugins }));
-  opts.passPerPreset = opts.presets.length > 0;
-  opts.envName = envName;
-  opts.cwd = absoluteCwd;
-
-  return {
-    options: opts,
-    passes: passes,
-  };
+import loadFullConfig from "./full";
+export type {
+  ResolvedConfig,
+  InputOptions,
+  PluginPasses,
+  Plugin,
+} from "./full";
+
+export { loadFullConfig as default };
+export { loadPartialConfig } from "./partial";
+export type { PartialConfig } from "./partial";
+
+export function loadOptions(opts: {}): Object | null {
+  const config = loadFullConfig(opts);
+
+  return config ? config.options : null;
 }
 
-/**
- * Load a generic plugin/preset from the given descriptor loaded from the config object.
- */
-const loadDescriptor = makeWeakCache(
-  (
-    { value, options, dirname, alias }: UnloadedDescriptor,
-    cache: CacheConfigurator<SimpleContext>,
-  ): LoadedDescriptor => {
-    // Disabled presets should already have been filtered out
-    if (options === false) throw new Error("Assertion failure");
-
-    options = options || {};
-
-    let item = value;
-    if (typeof value === "function") {
-      const api = Object.assign(Object.create(context), {
-        cache: cache.simple(),
-        env: () => cache.using(data => data.envName),
-        async: () => false,
-      });
-
-      try {
-        item = value(api, options, dirname);
-      } catch (e) {
-        if (alias) {
-          e.message += ` (While processing: ${JSON.stringify(alias)})`;
-        }
-        throw e;
-      }
-    }
-
-    if (!item || typeof item !== "object") {
-      throw new Error("Plugin/Preset did not return an object.");
-    }
-
-    if (typeof item.then === "function") {
-      throw new Error(
-        `You appear to be using an async plugin, ` +
-          `which your current version of Babel does not support.` +
-          `If you're using a published plugin, ` +
-          `you may need to upgrade your @babel/core version.`,
-      );
-    }
-
-    return { value: item, options, dirname, alias };
-  },
-);
-
-/**
- * Instantiate a plugin for the given descriptor, returning the plugin/options pair.
- */
-function loadPluginDescriptor(
-  descriptor: UnloadedDescriptor,
-  context: SimpleContext,
-): Plugin {
-  if (descriptor.value instanceof Plugin) {
-    if (descriptor.options) {
-      throw new Error(
-        "Passed options to an existing Plugin instance will not work.",
-      );
-    }
-
-    return descriptor.value;
+// For easier backward-compatibility, provide an API like the one we exposed in Babel 6.
+export class OptionManager {
+  init(opts: {}) {
+    return loadOptions(opts);
   }
-
-  return instantiatePlugin(loadDescriptor(descriptor, context), context);
-}
-
-const instantiatePlugin = makeWeakCache(
-  (
-    { value, options, dirname, alias }: LoadedDescriptor,
-    cache: CacheConfigurator<SimpleContext>,
-  ): Plugin => {
-    const pluginObj = validatePluginObject(value);
-
-    const plugin = Object.assign({}, pluginObj);
-    if (plugin.visitor) {
-      plugin.visitor = traverse.explode(clone(plugin.visitor));
-    }
-
-    if (plugin.inherits) {
-      const inheritsDescriptor = {
-        name: undefined,
-        alias: `${alias}$inherits`,
-        value: plugin.inherits,
-        options,
-        dirname,
-      };
-
-      // If the inherited plugin changes, reinstantiate this plugin.
-      const inherits = cache.invalidate(data =>
-        loadPluginDescriptor(inheritsDescriptor, data),
-      );
-
-      plugin.pre = chain(inherits.pre, plugin.pre);
-      plugin.post = chain(inherits.post, plugin.post);
-      plugin.manipulateOptions = chain(
-        inherits.manipulateOptions,
-        plugin.manipulateOptions,
-      );
-      plugin.visitor = traverse.visitors.merge([
-        inherits.visitor || {},
-        plugin.visitor || {},
-      ]);
-    }
-
-    return new Plugin(plugin, options, alias);
-  },
-);
-
-/**
- * Generate a config object that will act as the root of a new nested config.
- */
-const loadPresetDescriptor = (
-  descriptor: UnloadedDescriptor,
-  context: ConfigContext,
-): ConfigChain | null => {
-  return buildPresetChain(
-    instantiatePreset(loadDescriptor(descriptor, context)),
-    context,
-  );
-};
-
-const instantiatePreset = makeWeakCache(
-  ({ value, dirname, alias }: LoadedDescriptor): PresetInstance => {
-    return {
-      options: validate("preset", value),
-      alias,
-      dirname,
-    };
-  },
-);
-
-function chain(a, b) {
-  const fns = [a, b].filter(Boolean);
-  if (fns.length <= 1) return fns[0];
-
-  return function(...args) {
-    for (const fn of fns) {
-      fn.apply(this, args);
-    }
-  };
 }
diff --git a/packages/babel-core/src/config/item.js b/packages/babel-core/src/config/item.js
new file mode 100644
index 0000000000000..ab9b51207ee96
--- /dev/null
+++ b/packages/babel-core/src/config/item.js
@@ -0,0 +1,128 @@
+// @flow
+
+import type { PluginTarget, PluginOptions } from "./validation/options";
+
+import path from "path";
+import {
+  createDescriptor,
+  type UnloadedDescriptor,
+} from "./config-descriptors";
+
+export function createItemFromDescriptor(desc: UnloadedDescriptor): ConfigItem {
+  return new ConfigItem(desc);
+}
+
+/**
+ * Create a config item using the same value format used in Babel's config
+ * files. Items returned from this function should be cached by the caller
+ * ideally, as recreating the config item will mean re-resolving the item
+ * and re-evaluating the plugin/preset function.
+ */
+export function createConfigItem(
+  value:
+    | PluginTarget
+    | [PluginTarget, PluginOptions]
+    | [PluginTarget, PluginOptions, string | void],
+  {
+    dirname = ".",
+    type,
+  }: {
+    dirname?: string,
+    type?: "preset" | "plugin",
+  } = {},
+): ConfigItem {
+  const descriptor = createDescriptor(value, path.resolve(dirname), {
+    type,
+    alias: "programmatic item",
+  });
+
+  return createItemFromDescriptor(descriptor);
+}
+
+export function getItemDescriptor(item: mixed): UnloadedDescriptor | void {
+  if (item instanceof ConfigItem) {
+    return item._descriptor;
+  }
+
+  return undefined;
+}
+
+export type { ConfigItem };
+
+/**
+ * A public representation of a plugin/preset that will _eventually_ be load.
+ * Users can use this to interact with the results of a loaded Babel
+ * configuration.
+ *
+ * Any changes to public properties of this class should be considered a
+ * breaking change to Babel's API.
+ */
+class ConfigItem {
+  /**
+   * The private underlying descriptor that Babel actually cares about.
+   * If you access this, you are a bad person.
+   */
+  _descriptor: UnloadedDescriptor;
+
+  /**
+   * The resolved value of the item itself.
+   */
+  value: {} | Function;
+
+  /**
+   * The options, if any, that were passed to the item.
+   * Mutating this will lead to undefined behavior. If you need
+   */
+  options: {} | void;
+
+  /**
+   * The directory that the options for this item are relative to.
+   */
+  dirname: string;
+
+  /**
+   * Get the name of the plugin, if the user gave it one.
+   */
+  name: string | void;
+
+  /**
+   * Data about the file that the item was loaded from, if Babel knows it.
+   */
+  file: {
+    // The requested path, e.g. "@babel/env".
+    request: string,
+
+    // The resolved absolute path of the file.
+    resolved: string,
+  } | void;
+
+  constructor(descriptor: UnloadedDescriptor) {
+    // Make people less likely to stumble onto this if they are exploring
+    // programmatically, and also make sure that if people happen to
+    // pass the item through JSON.stringify, it doesn't show up.
+    this._descriptor = descriptor;
+    Object.defineProperty(this, "_descriptor", ({ enumerable: false }: any));
+
+    if (this._descriptor.options === false) {
+      throw new Error("Assertion failure - unexpected false options");
+    }
+
+    this.value = this._descriptor.value;
+    this.options = this._descriptor.options;
+    this.dirname = this._descriptor.dirname;
+    this.name = this._descriptor.name;
+    this.file = this._descriptor.file
+      ? {
+          request: this._descriptor.file.request,
+          resolved: this._descriptor.file.resolved,
+        }
+      : undefined;
+
+    // Freeze the object to make it clear that people shouldn't expect mutating
+    // this object to do anything. A new item should be created if they want
+    // to change something.
+    Object.freeze(this);
+  }
+}
+
+Object.freeze(ConfigItem.prototype);
diff --git a/packages/babel-core/src/config/partial.js b/packages/babel-core/src/config/partial.js
new file mode 100644
index 0000000000000..83d0d08086b68
--- /dev/null
+++ b/packages/babel-core/src/config/partial.js
@@ -0,0 +1,128 @@
+// @flow
+
+import path from "path";
+import Plugin from "./plugin";
+import { mergeOptions } from "./util";
+import { createItemFromDescriptor } from "./item";
+import { buildRootChain, type ConfigContext } from "./config-chain";
+import { getEnv } from "./helpers/environment";
+import { validate, type ValidatedOptions } from "./validation/options";
+
+import type { ConfigFile, IgnoreFile } from "./files";
+
+export default function loadPrivatePartialConfig(
+  inputOpts: mixed,
+): {
+  options: ValidatedOptions,
+  context: ConfigContext,
+  ignore: IgnoreFile | void,
+  babelrc: ConfigFile | void,
+} | null {
+  if (
+    inputOpts != null &&
+    (typeof inputOpts !== "object" || Array.isArray(inputOpts))
+  ) {
+    throw new Error("Babel options must be an object, null, or undefined");
+  }
+
+  const args = inputOpts ? validate("arguments", inputOpts) : {};
+
+  const { envName = getEnv(), cwd = "." } = args;
+  const absoluteCwd = path.resolve(cwd);
+
+  const context: ConfigContext = {
+    filename: args.filename ? path.resolve(cwd, args.filename) : null,
+    cwd: absoluteCwd,
+    envName,
+  };
+
+  const configChain = buildRootChain(args, context);
+  if (!configChain) return null;
+
+  const options = {};
+  configChain.options.forEach(opts => {
+    mergeOptions(options, opts);
+  });
+
+  // Tack the passes onto the object itself so that, if this object is
+  // passed back to Babel a second time, it will be in the right structure
+  // to not change behavior.
+  options.babelrc = false;
+  options.envName = envName;
+  options.cwd = absoluteCwd;
+  options.passPerPreset = false;
+
+  options.plugins = configChain.plugins.map(descriptor =>
+    createItemFromDescriptor(descriptor),
+  );
+  options.presets = configChain.presets.map(descriptor =>
+    createItemFromDescriptor(descriptor),
+  );
+
+  return {
+    options,
+    context,
+    ignore: configChain.ignore,
+    babelrc: configChain.babelrc,
+  };
+}
+
+export function loadPartialConfig(inputOpts: mixed): PartialConfig | null {
+  const result = loadPrivatePartialConfig(inputOpts);
+  if (!result) return null;
+
+  const { options, babelrc, ignore } = result;
+
+  (options.plugins || []).forEach(item => {
+    if (item.value instanceof Plugin) {
+      throw new Error(
+        "Passing cached plugin instances is not supported in " +
+          "babel.loadPartialConfig()",
+      );
+    }
+  });
+
+  return new PartialConfig(
+    options,
+    babelrc ? babelrc.filepath : undefined,
+    ignore ? ignore.filepath : undefined,
+  );
+}
+
+export type { PartialConfig };
+
+class PartialConfig {
+  /**
+   * These properties are public, so any changes to them should be considered
+   * a breaking change to Babel's API.
+   */
+  options: ValidatedOptions;
+  babelrc: string | void;
+  babelignore: string | void;
+
+  constructor(
+    options: ValidatedOptions,
+    babelrc: string | void,
+    ignore: string | void,
+  ) {
+    this.options = options;
+    this.babelignore = ignore;
+    this.babelrc = babelrc;
+
+    // Freeze since this is a public API and it should be extremely obvious that
+    // reassigning properties on here does nothing.
+    Object.freeze(this);
+  }
+
+  /**
+   * Returns true if their is a config file in the filesystem for this config.
+   *
+   * While this only means .babelrc(.mjs)?/package.json#babel right now, it
+   * may well expand in the future, so using this is recommended vs checking
+   * this.babelrc directly.
+   */
+  hasFilesystemConfig(): boolean {
+    return this.babelrc !== undefined;
+  }
+}
+Object.freeze(PartialConfig.prototype);
diff --git a/packages/babel-core/src/config/util.js b/packages/babel-core/src/config/util.js
new file mode 100644
index 0000000000000..f64975216db38
--- /dev/null
+++ b/packages/babel-core/src/config/util.js
@@ -0,0 +1,30 @@
+// @flow
+
+import type { ValidatedOptions } from "./validation/options";
+
+export function mergeOptions(
+  target: ValidatedOptions,
+  source: ValidatedOptions,
+): void {
+  for (const k of Object.keys(source)) {
+    if (k === "parserOpts" && source.parserOpts) {
+      const parserOpts = source.parserOpts;
+      const targetObj = (target.parserOpts = target.parserOpts || {});
+      mergeDefaultFields(targetObj, parserOpts);
+    } else if (k === "generatorOpts" && source.generatorOpts) {
+      const generatorOpts = source.generatorOpts;
+      const targetObj = (target.generatorOpts = target.generatorOpts || {});
+      mergeDefaultFields(targetObj, generatorOpts);
+    } else {
+      const val = source[k];
+      if (val !== undefined) target[k] = (val: any);
+    }
+  }
+}
+
+function mergeDefaultFields<T: {}>(target: T, source: T) {
+  for (const k of Object.keys(source)) {
+    const val = source[k];
+    if (val !== undefined) target[k] = (val: any);
+  }
+}
diff --git a/packages/babel-core/src/config/validation/option-assertions.js b/packages/babel-core/src/config/validation/option-assertions.js
index c6330e717630d..97b860f016b3c 100644
--- a/packages/babel-core/src/config/validation/option-assertions.js
+++ b/packages/babel-core/src/config/validation/option-assertions.js
@@ -140,6 +140,8 @@ export function assertConfigApplicableTest(
   key: string,
   value: mixed,
 ): ConfigApplicableTest | void {
+  if (value === undefined) return value;
+
   if (Array.isArray(value)) {
     value.forEach((item, i) => {
       if (!checkValidTest(item)) {
diff --git a/packages/babel-core/src/config/validation/options.js b/packages/babel-core/src/config/validation/options.js
index 96b51f73ef441..290d326d5bd27 100644
--- a/packages/babel-core/src/config/validation/options.js
+++ b/packages/babel-core/src/config/validation/options.js
@@ -1,5 +1,8 @@
 // @flow
 
+import type { ConfigItem } from "../item";
+import Plugin from "../plugin";
+
 import removed from "./removed";
 import {
   assertString,
@@ -116,9 +119,6 @@ const COMMON_VALIDATORS: ValidatorSet = {
   sourceMap: (assertSourceMaps: Validator<
     $PropertyType<ValidatedOptions, "sourceMap">,
   >),
-  sourceMapTarget: (assertString: Validator<
-    $PropertyType<ValidatedOptions, "sourceMapTarget">,
-  >),
   sourceFileName: (assertString: Validator<
     $PropertyType<ValidatedOptions, "sourceFileName">,
   >),
@@ -189,7 +189,6 @@ export type ValidatedOptions = {
   // Sourcemap generation options.
   sourceMaps?: SourceMapsOption,
   sourceMap?: SourceMapsOption,
-  sourceMapTarget?: string,
   sourceFileName?: string,
   sourceRoot?: string,
 
@@ -214,10 +213,11 @@ export type IgnoreList = $ReadOnlyArray<IgnoreItem>;
 export type PluginOptions = {} | void | false;
 export type PluginTarget = string | {} | Function;
 export type PluginItem =
+  | ConfigItem
   | Plugin
   | PluginTarget
   | [PluginTarget, PluginOptions]
-  | [PluginTarget, PluginOptions, string];
+  | [PluginTarget, PluginOptions, string | void];
 export type PluginList = $ReadOnlyArray<PluginItem>;
 
 export type OverridesList = Array<ValidatedOptions>;
diff --git a/packages/babel-core/src/config/validation/removed.js b/packages/babel-core/src/config/validation/removed.js
index 09885afec3fc5..165bc4049f505 100644
--- a/packages/babel-core/src/config/validation/removed.js
+++ b/packages/babel-core/src/config/validation/removed.js
@@ -44,7 +44,8 @@ export default {
     message: "Put the specific transforms you want in the `plugins` option",
   },
   sourceMapName: {
-    message: "Use the `sourceMapTarget` option",
+    message:
+      "The `sourceMapName` option has been removed because it makes more sense for the tooling that calls Babel to assign `map.file` themselves.",
   },
   stage: {
     message:
@@ -64,4 +65,10 @@ export default {
     message:
       "Generated plugin metadata is always included in the output result",
   },
+
+  sourceMapTarget: {
+    version: 6,
+    message:
+      "The `sourceMapTarget` option has been removed because it makes more sense for the tooling that calls Babel to assign `map.file` themselves.",
+  },
 };
diff --git a/packages/babel-core/src/index.js b/packages/babel-core/src/index.js
index 7b30f15dbbd07..d6a3e80cac66e 100644
--- a/packages/babel-core/src/index.js
+++ b/packages/babel-core/src/index.js
@@ -13,20 +13,9 @@ export * as types from "@babel/types";
 export { default as traverse } from "@babel/traverse";
 export { default as template } from "@babel/template";
 
-import loadConfig from "./config";
+export { loadPartialConfig, loadOptions, OptionManager } from "./config";
 
-export function loadOptions(opts: {}): Object | null {
-  const config = loadConfig(opts);
-
-  return config ? config.options : null;
-}
-
-// For easier backward-compatibility, provide an API like the one we exposed in Babel 6.
-export class OptionManager {
-  init(opts: {}) {
-    return loadOptions(opts);
-  }
-}
+export { createConfigItem } from "./config/item";
 
 export function Plugin(alias: string) {
   throw new Error(
diff --git a/packages/babel-core/src/parse.js b/packages/babel-core/src/parse.js
index 1a7e2231a3067..94e7284520ebe 100644
--- a/packages/babel-core/src/parse.js
+++ b/packages/babel-core/src/parse.js
@@ -1,6 +1,6 @@
 // @flow
 
-import loadConfig, { InputOptions } from "./config";
+import loadConfig, { type InputOptions } from "./config";
 import normalizeFile from "./transformation/normalize-file";
 import normalizeOptions from "./transformation/normalize-opts";
 
diff --git a/packages/babel-core/src/tools/build-external-helpers.js b/packages/babel-core/src/tools/build-external-helpers.js
index 2b6eba92a16e1..c6aa2bf6d21a1 100644
--- a/packages/babel-core/src/tools/build-external-helpers.js
+++ b/packages/babel-core/src/tools/build-external-helpers.js
@@ -3,19 +3,22 @@ import generator from "@babel/generator";
 import template from "@babel/template";
 import * as t from "@babel/types";
 
-const buildUmdWrapper = template(`
-  (function (root, factory) {
-    if (typeof define === "function" && define.amd) {
-      define(AMD_ARGUMENTS, factory);
-    } else if (typeof exports === "object") {
-      factory(COMMON_ARGUMENTS);
-    } else {
-      factory(BROWSER_ARGUMENTS);
-    }
-  })(UMD_ROOT, function (FACTORY_PARAMETERS) {
-    FACTORY_BODY
-  });
-`);
+// Wrapped to avoid wasting time parsing this when almost no-one uses
+// build-external-helpers.
+const buildUmdWrapper = replacements =>
+  template`
+    (function (root, factory) {
+      if (typeof define === "function" && define.amd) {
+        define(AMD_ARGUMENTS, factory);
+      } else if (typeof exports === "object") {
+        factory(COMMON_ARGUMENTS);
+      } else {
+        factory(BROWSER_ARGUMENTS);
+      }
+    })(UMD_ROOT, function (FACTORY_PARAMETERS) {
+      FACTORY_BODY
+    });
+  `(replacements);
 
 function buildGlobal(whitelist) {
   const namespace = t.identifier("babelHelpers");
diff --git a/packages/babel-core/src/transformation/index.js b/packages/babel-core/src/transformation/index.js
index a40b12f42cc00..8174f7bd8228f 100644
--- a/packages/babel-core/src/transformation/index.js
+++ b/packages/babel-core/src/transformation/index.js
@@ -64,9 +64,10 @@ export function runSync(
   return {
     metadata: file.metadata,
     options: opts,
-    ast: opts.ast !== false ? file.ast : null,
+    ast: opts.ast === true ? file.ast : null,
     code: outputCode === undefined ? null : outputCode,
     map: outputMap === undefined ? null : outputMap,
+    sourceType: file.ast.program.sourceType,
   };
 }
 
diff --git a/packages/babel-core/src/transformation/normalize-file.js b/packages/babel-core/src/transformation/normalize-file.js
index 2ff27aadaf0dd..2ea1e034eda4c 100644
--- a/packages/babel-core/src/transformation/normalize-file.js
+++ b/packages/babel-core/src/transformation/normalize-file.js
@@ -89,6 +89,12 @@ function parser(pluginPasses, options, code) {
     }
     throw new Error("More than one plugin attempted to override parsing.");
   } catch (err) {
+    if (err.code === "BABEL_PARSER_SOURCETYPE_MODULE_REQUIRED") {
+      err.message +=
+        "\nConsider renaming the file to '.mjs', or setting sourceType:module " +
+        "or sourceType:unambiguous in your Babel config for this file.";
+    }
+
     const { loc, missingPlugin } = err;
     if (loc) {
       const codeFrame = codeFrameColumns(
diff --git a/packages/babel-core/src/transformation/normalize-opts.js b/packages/babel-core/src/transformation/normalize-opts.js
index f224ff01ee13a..6cd0f32447f1d 100644
--- a/packages/babel-core/src/transformation/normalize-opts.js
+++ b/packages/babel-core/src/transformation/normalize-opts.js
@@ -15,7 +15,6 @@ export default function normalizeOptions(config: ResolvedConfig): {} {
     sourceRoot = moduleRoot,
 
     sourceFileName = filenameRelative,
-    sourceMapTarget = filenameRelative,
 
     comments = true,
     compact = "auto",
@@ -47,7 +46,6 @@ export default function normalizeOptions(config: ResolvedConfig): {} {
 
         // Source-map generation flags.
         sourceMaps,
-        sourceMapTarget,
         sourceRoot,
         sourceFileName,
       },
diff --git a/packages/babel-core/src/transformation/util/missing-plugin-helper.js b/packages/babel-core/src/transformation/util/missing-plugin-helper.js
index 0d029e71eb581..c595e178a1231 100644
--- a/packages/babel-core/src/transformation/util/missing-plugin-helper.js
+++ b/packages/babel-core/src/transformation/util/missing-plugin-helper.js
@@ -113,6 +113,16 @@ const pluginNameMap = {
       url: "https://git.io/vb4yd",
     },
   },
+  logicalAssignment: {
+    syntax: {
+      name: "@babel/plugin-syntax-logical-assignment-operators",
+      url: "https://git.io/vAlBp",
+    },
+    transform: {
+      name: "@babel/plugin-proposal-logical-assignment-operators",
+      url: "https://git.io/vAlRe",
+    },
+  },
   nullishCoalescingOperator: {
     syntax: {
       name: "@babel/plugin-syntax-nullish-coalescing-operator",
diff --git a/packages/babel-core/test/api.js b/packages/babel-core/test/api.js
index a38ae5913cce6..101a184089c9d 100644
--- a/packages/babel-core/test/api.js
+++ b/packages/babel-core/test/api.js
@@ -1,16 +1,15 @@
 import * as babel from "../lib/index";
 import sourceMap from "source-map";
-import assert from "assert";
 import path from "path";
 import Plugin from "../lib/config/plugin";
 import generator from "@babel/generator";
 
 function assertIgnored(result) {
-  assert.ok(!result);
+  expect(result).toBeFalsy();
 }
 
 function assertNotIgnored(result) {
-  assert.ok(!result.ignored);
+  expect(result.ignored).toBeFalsy();
 }
 
 // shim
@@ -34,6 +33,7 @@ describe("parser and generator options", function() {
 
   function newTransform(string) {
     return babel.transform(string, {
+      ast: true,
       parserOpts: {
         parser: recast.parse,
         plugins: ["flow"],
@@ -47,25 +47,28 @@ describe("parser and generator options", function() {
 
   it("options", function() {
     const string = "original;";
-    assert.deepEqual(newTransform(string).ast, babel.transform(string).ast);
-    assert.equal(newTransform(string).code, string);
+    expect(newTransform(string).ast).toEqual(
+      babel.transform(string, { ast: true }).ast,
+    );
+    expect(newTransform(string).code).toBe(string);
   });
 
   it("experimental syntax", function() {
     const experimental = "var a: number = 1;";
 
-    assert.deepEqual(
-      newTransform(experimental).ast,
+    expect(newTransform(experimental).ast).toEqual(
       babel.transform(experimental, {
+        ast: true,
         parserOpts: {
           plugins: ["flow"],
         },
       }).ast,
     );
-    assert.equal(newTransform(experimental).code, experimental);
+    expect(newTransform(experimental).code).toBe(experimental);
 
     function newTransformWithPlugins(string) {
       return babel.transform(string, {
+        ast: true,
         plugins: [__dirname + "/../../babel-plugin-syntax-flow"],
         parserOpts: {
           parser: recast.parse,
@@ -76,43 +79,41 @@ describe("parser and generator options", function() {
       });
     }
 
-    assert.deepEqual(
-      newTransformWithPlugins(experimental).ast,
+    expect(newTransformWithPlugins(experimental).ast).toEqual(
       babel.transform(experimental, {
+        ast: true,
         parserOpts: {
           plugins: ["flow"],
         },
       }).ast,
     );
-    assert.equal(newTransformWithPlugins(experimental).code, experimental);
+    expect(newTransformWithPlugins(experimental).code).toBe(experimental);
   });
 
   it("other options", function() {
     const experimental = "if (true) {\n  import a from 'a';\n}";
 
-    assert.notEqual(
-      newTransform(experimental).ast,
+    expect(newTransform(experimental).ast).not.toBe(
       babel.transform(experimental, {
+        ast: true,
         parserOpts: {
           allowImportExportEverywhere: true,
         },
       }).ast,
     );
-    assert.equal(newTransform(experimental).code, experimental);
+    expect(newTransform(experimental).code).toBe(experimental);
   });
 });
 
 describe("api", function() {
   it("exposes the resolvePlugin method", function() {
-    assert.throws(
-      () => babel.resolvePlugin("nonexistent-plugin"),
+    expect(() => babel.resolvePlugin("nonexistent-plugin")).toThrow(
       /Cannot find module 'babel-plugin-nonexistent-plugin'/,
     );
   });
 
   it("exposes the resolvePreset method", function() {
-    assert.throws(
-      () => babel.resolvePreset("nonexistent-preset"),
+    expect(() => babel.resolvePreset("nonexistent-preset")).toThrow(
       /Cannot find module 'babel-preset-nonexistent-preset'/,
     );
   });
@@ -127,9 +128,9 @@ describe("api", function() {
       res,
     ) {
       if (err) return done(err);
-      assert.equal(res.code, "foo();");
+      expect(res.code).toBe("foo();");
       // keep user options untouched
-      assert.deepEqual(options, { babelrc: false });
+      expect(options).toEqual({ babelrc: false });
       done();
     });
   });
@@ -139,20 +140,19 @@ describe("api", function() {
       babelrc: false,
     };
     Object.freeze(options);
-    assert.equal(
+    expect(
       babel.transformFileSync(__dirname + "/fixtures/api/file.js", options)
         .code,
-      "foo();",
-    );
-    assert.deepEqual(options, { babelrc: false });
+    ).toBe("foo();");
+    expect(options).toEqual({ babelrc: false });
   });
 
   it("options throw on falsy true", function() {
-    return assert.throws(function() {
+    return expect(function() {
       babel.transform("", {
         plugins: [__dirname + "/../../babel-plugin-syntax-jsx", false],
       });
-    }, /.plugins\[1\] must be a string, object, function/);
+    }).toThrow(/.plugins\[1\] must be a string, object, function/);
   });
 
   it("options merge backwards", function() {
@@ -160,9 +160,8 @@ describe("api", function() {
       presets: [__dirname + "/../../babel-preset-es2015"],
       plugins: [__dirname + "/../../babel-plugin-syntax-jsx"],
     }).then(function(result) {
-      assert.ok(
-        result.options.plugins[0].manipulateOptions.toString().indexOf("jsx") >=
-          0,
+      expect(result.options.plugins[0].manipulateOptions.toString()).toEqual(
+        expect.stringContaining("jsx"),
       );
     });
   });
@@ -177,7 +176,7 @@ describe("api", function() {
           return callback;
         }
 
-        assert.equal(visitorType, "enter");
+        expect(visitorType).toBe("enter");
 
         return function() {
           calledIntercept++;
@@ -197,8 +196,8 @@ describe("api", function() {
       ],
     });
 
-    assert.equal(calledRaw, 4);
-    assert.equal(calledIntercept, 4);
+    expect(calledRaw).toBe(4);
+    expect(calledIntercept).toBe(4);
   });
 
   it("pass per preset", function() {
@@ -206,6 +205,7 @@ describe("api", function() {
 
     function execTest(passPerPreset) {
       return babel.transform("type Foo = number; let x = (y): Foo => y;", {
+        sourceType: "script",
         passPerPreset: passPerPreset,
         presets: [
           // First preset with our plugin, "before"
@@ -257,9 +257,9 @@ describe("api", function() {
 
     let result = execTest(true);
 
-    assert.equal(aliasBaseType, "NumberTypeAnnotation");
+    expect(aliasBaseType).toBe("NumberTypeAnnotation");
 
-    assert.deepEqual(result.code, "var x = function x(y) {\n  return y;\n};");
+    expect(result.code).toBe("var x = function x(y) {\n  return y;\n};");
 
     // 2. passPerPreset: false
 
@@ -267,9 +267,9 @@ describe("api", function() {
 
     result = execTest(false);
 
-    assert.equal(aliasBaseType, null);
+    expect(aliasBaseType).toBeNull();
 
-    assert.deepEqual(result.code, "var x = function x(y) {\n  return y;\n};");
+    expect(result.code).toBe("var x = function x(y) {\n  return y;\n};");
   });
 
   it("complex plugin and preset ordering", function() {
@@ -290,6 +290,9 @@ describe("api", function() {
       return { plugins: [pushPlugin(str)] };
     }
 
+    const oldEnv = process.env.BABEL_ENV;
+    process.env.BABEL_ENV = "development";
+
     const result = babel.transform("", {
       filename: path.join(
         __dirname,
@@ -307,8 +310,13 @@ describe("api", function() {
       },
     });
 
-    assert.equal(
-      result.code,
+    if (oldEnv === undefined) {
+      delete process.env.BABEL_ENV;
+    } else {
+      process.env.BABEL_ENV = oldEnv;
+    }
+
+    expect(result.code).toBe(
       [
         "thirteen;",
         "fourteen;",
@@ -356,7 +364,7 @@ describe("api", function() {
       },
     );
 
-    assert.deepEqual(
+    expect(
       [
         "function _classCallCheck(instance, Constructor) {",
         "  if (!(instance instanceof Constructor)) {",
@@ -368,36 +376,46 @@ describe("api", function() {
         "  _classCallCheck(this, Foo);",
         "};",
       ].join("\n"),
-      result.code,
-    );
+    ).toBe(result.code);
 
     const consumer = new sourceMap.SourceMapConsumer(result.map);
 
-    assert.deepEqual(
+    expect(
       consumer.originalPositionFor({
         line: 7,
         column: 4,
       }),
-      {
-        name: null,
-        source: "stdout",
-        line: 1,
-        column: 6,
-      },
-    );
+    ).toEqual({
+      name: null,
+      source: "stdout",
+      line: 1,
+      column: 6,
+    });
   });
 
   it("code option false", function() {
     return transformAsync("foo('bar');", { code: false }).then(function(
       result,
     ) {
-      assert.ok(!result.code);
+      expect(result.code).toBeFalsy();
     });
   });
 
   it("ast option false", function() {
     return transformAsync("foo('bar');", { ast: false }).then(function(result) {
-      assert.ok(!result.ast);
+      expect(result.ast).toBeFalsy();
+    });
+  });
+
+  it("ast option true", function() {
+    return transformAsync("foo('bar');", { ast: true }).then(function(result) {
+      expect(result.ast).toBeTruthy();
+    });
+  });
+
+  it("ast option default", function() {
+    return transformAsync("foo('bar');").then(function(result) {
+      expect(result.ast).toBeFalsy();
     });
   });
 
@@ -425,8 +443,7 @@ describe("api", function() {
         },
       ],
     }).then(function(result) {
-      assert.equal(
-        result.code,
+      expect(result.code).toBe(
         "/*before*/\nstart;\n\n/*after*/\nclass Foo {}\n\n/*before*/\nend;\n\n/*after*/",
       );
     });
@@ -514,14 +531,14 @@ describe("api", function() {
     const oldBabelEnv = process.env.BABEL_ENV;
     const oldNodeEnv = process.env.NODE_ENV;
 
-    setup(function() {
+    beforeEach(function() {
       // Tests need to run with the default and specific values for these. They
       // need to be cleared for each test.
       delete process.env.BABEL_ENV;
       delete process.env.NODE_ENV;
     });
 
-    suiteTeardown(function() {
+    afterAll(function() {
       process.env.BABEL_ENV = oldBabelEnv;
       process.env.NODE_ENV = oldNodeEnv;
     });
@@ -533,7 +550,7 @@ describe("api", function() {
         },
       });
 
-      assert.equal(result.options.comments, false);
+      expect(result.options.comments).toBe(false);
     });
 
     it("BABEL_ENV", function() {
@@ -543,7 +560,7 @@ describe("api", function() {
           foo: { comments: false },
         },
       });
-      assert.equal(result.options.comments, false);
+      expect(result.options.comments).toBe(false);
     });
 
     it("NODE_ENV", function() {
@@ -553,7 +570,7 @@ describe("api", function() {
           foo: { comments: false },
         },
       });
-      assert.equal(result.options.comments, false);
+      expect(result.options.comments).toBe(false);
     });
   });
 
@@ -578,25 +595,25 @@ describe("api", function() {
 
     it("all", function() {
       const script = babel.buildExternalHelpers();
-      assert.ok(script.indexOf("classCallCheck") >= -1);
-      assert.ok(script.indexOf("inherits") >= 0);
+      expect(script).toEqual(expect.stringContaining("classCallCheck"));
+      expect(script).toEqual(expect.stringContaining("inherits"));
     });
 
     it("whitelist", function() {
       const script = babel.buildExternalHelpers(["inherits"]);
-      assert.ok(script.indexOf("classCallCheck") === -1);
-      assert.ok(script.indexOf("inherits") >= 0);
+      expect(script).not.toEqual(expect.stringContaining("classCallCheck"));
+      expect(script).toEqual(expect.stringContaining("inherits"));
     });
 
     it("empty whitelist", function() {
       const script = babel.buildExternalHelpers([]);
-      assert.ok(script.indexOf("classCallCheck") === -1);
-      assert.ok(script.indexOf("inherits") === -1);
+      expect(script).not.toEqual(expect.stringContaining("classCallCheck"));
+      expect(script).not.toEqual(expect.stringContaining("inherits"));
     });
 
     it("underscored", function() {
       const script = babel.buildExternalHelpers(["typeof"]);
-      assert.ok(script.indexOf("typeof") >= 0);
+      expect(script).toEqual(expect.stringContaining("typeof"));
     });
   });
 
@@ -610,16 +627,12 @@ describe("api", function() {
         __dirname + "/fixtures/api/parsing-errors/only-syntax/file.js",
         options,
         function(err) {
-          assert.ok(
-            RegExp(
-              "Support for the experimental syntax 'dynamicImport' isn't currently enabled \\(1:9\\):",
-            ).exec(err.message),
+          expect(err.message).toMatch(
+            "Support for the experimental syntax 'dynamicImport' isn't currently enabled (1:9)",
           );
-          assert.ok(
-            RegExp(
-              "Add @babel/plugin-syntax-dynamic-import \\(https://git.io/vb4Sv\\) to the " +
-                "'plugins' section of your Babel config to enable parsing.",
-            ).exec(err.message),
+          expect(err.message).toMatch(
+            "Add @babel/plugin-syntax-dynamic-import (https://git.io/vb4Sv) to the " +
+              "'plugins' section of your Babel config to enable parsing.",
           );
           done();
         },
@@ -631,16 +644,12 @@ describe("api", function() {
         __dirname + "/fixtures/api/parsing-errors/syntax-and-transform/file.js",
         options,
         function(err) {
-          assert.ok(
-            RegExp(
-              "Support for the experimental syntax 'asyncGenerators' isn't currently enabled \\(1:15\\):",
-            ).exec(err.message),
+          expect(err.message).toMatch(
+            "Support for the experimental syntax 'asyncGenerators' isn't currently enabled (1:15):",
           );
-          assert.ok(
-            RegExp(
-              "Add @babel/plugin-proposal-async-generator-functions \\(https://git.io/vb4yp\\) to the " +
-                "'plugins' section of your Babel config to enable transformation.",
-            ).exec(err.message),
+          expect(err.message).toMatch(
+            "Add @babel/plugin-proposal-async-generator-functions (https://git.io/vb4yp) to the " +
+              "'plugins' section of your Babel config to enable transformation.",
           );
           done();
         },
diff --git a/packages/babel-core/test/browserify.js b/packages/babel-core/test/browserify.js
index df0090344340b..2d200bb1ce2f6 100644
--- a/packages/babel-core/test/browserify.js
+++ b/packages/babel-core/test/browserify.js
@@ -1,5 +1,4 @@
 import browserify from "browserify";
-import assert from "assert";
 import path from "path";
 import vm from "vm";
 
@@ -11,7 +10,7 @@ describe("browserify", function() {
 
     bundler.bundle(function(err, bundle) {
       if (err) return done(err);
-      assert.ok(bundle.length, "bundle output code");
+      expect(bundle.length).toBeTruthy();
 
       // ensure that the code runs without throwing an exception
       vm.runInNewContext("var global = this;\n" + bundle, {});
diff --git a/packages/babel-core/test/caching-api.js b/packages/babel-core/test/caching-api.js
index 9daee26fdc895..0318759fe8612 100644
--- a/packages/babel-core/test/caching-api.js
+++ b/packages/babel-core/test/caching-api.js
@@ -1,4 +1,3 @@
-import assert from "assert";
 import { makeStrongCache } from "../lib/config/caching";
 
 describe("caching API", () => {
@@ -10,13 +9,13 @@ describe("caching API", () => {
       return { arg, count: count++ };
     });
 
-    assert.deepEqual(fn("one"), { arg: "one", count: 0 });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", count: 0 });
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", count: 1 });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", count: 1 });
+    expect(fn("two")).toBe(fn("two"));
 
-    assert.notEqual(fn("one"), fn("two"));
+    expect(fn("one")).not.toEqual(fn("two"));
   });
 
   it("should allow disabling caching with .never()", () => {
@@ -27,15 +26,15 @@ describe("caching API", () => {
       return { arg, count: count++ };
     });
 
-    assert.deepEqual(fn("one"), { arg: "one", count: 0 });
-    assert.deepEqual(fn("one"), { arg: "one", count: 1 });
-    assert.notEqual(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", count: 0 });
+    expect(fn("one")).toEqual({ arg: "one", count: 1 });
+    expect(fn("one")).not.toEqual(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", count: 4 });
-    assert.deepEqual(fn("two"), { arg: "two", count: 5 });
-    assert.notEqual(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", count: 4 });
+    expect(fn("two")).toEqual({ arg: "two", count: 5 });
+    expect(fn("two")).not.toEqual(fn("two"));
 
-    assert.notEqual(fn("one"), fn("two"));
+    expect(fn("one")).not.toEqual(fn("two"));
   });
 
   it("should allow caching based on a value with .using(fn)", () => {
@@ -48,35 +47,35 @@ describe("caching API", () => {
       return { arg, val, count: count++ };
     });
 
-    assert.deepEqual(fn("one"), { arg: "one", val: "default", count: 0 });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", val: "default", count: 0 });
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", val: "default", count: 1 });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", val: "default", count: 1 });
+    expect(fn("two")).toBe(fn("two"));
 
     other = "new";
 
-    assert.deepEqual(fn("one"), { arg: "one", val: "new", count: 2 });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", val: "new", count: 2 });
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", val: "new", count: 3 });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", val: "new", count: 3 });
+    expect(fn("two")).toBe(fn("two"));
 
     other = "default";
 
-    assert.deepEqual(fn("one"), { arg: "one", val: "default", count: 0 });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", val: "default", count: 0 });
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", val: "default", count: 1 });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", val: "default", count: 1 });
+    expect(fn("two")).toBe(fn("two"));
 
     other = "new";
 
-    assert.deepEqual(fn("one"), { arg: "one", val: "new", count: 2 });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", val: "new", count: 2 });
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", val: "new", count: 3 });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", val: "new", count: 3 });
+    expect(fn("two")).toBe(fn("two"));
   });
 
   it("should allow invalidation based on a value with .invalidate(fn)", () => {
@@ -89,35 +88,35 @@ describe("caching API", () => {
       return { arg, val, count: count++ };
     });
 
-    assert.deepEqual(fn("one"), { arg: "one", val: "default", count: 0 });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", val: "default", count: 0 });
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", val: "default", count: 1 });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", val: "default", count: 1 });
+    expect(fn("two")).toBe(fn("two"));
 
     other = "new";
 
-    assert.deepEqual(fn("one"), { arg: "one", val: "new", count: 2 });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", val: "new", count: 2 });
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", val: "new", count: 3 });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", val: "new", count: 3 });
+    expect(fn("two")).toBe(fn("two"));
 
     other = "default";
 
-    assert.deepEqual(fn("one"), { arg: "one", val: "default", count: 4 });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", val: "default", count: 4 });
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", val: "default", count: 5 });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", val: "default", count: 5 });
+    expect(fn("two")).toBe(fn("two"));
 
     other = "new";
 
-    assert.deepEqual(fn("one"), { arg: "one", val: "new", count: 6 });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", val: "new", count: 6 });
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", val: "new", count: 7 });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", val: "new", count: 7 });
+    expect(fn("two")).toBe(fn("two"));
   });
 
   it("should allow invalidation with .using and .invalidate", () => {
@@ -132,93 +131,93 @@ describe("caching API", () => {
       return { arg, val, val2, count: count++ };
     });
 
-    assert.deepEqual(fn("one"), {
+    expect(fn("one")).toEqual({
       arg: "one",
       val: "default",
       val2: "another",
       count: 0,
     });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), {
+    expect(fn("two")).toEqual({
       arg: "two",
       val: "default",
       val2: "another",
       count: 1,
     });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toBe(fn("two"));
 
     other = "new";
 
-    assert.deepEqual(fn("one"), {
+    expect(fn("one")).toEqual({
       arg: "one",
       val: "new",
       val2: "another",
       count: 2,
     });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), {
+    expect(fn("two")).toEqual({
       arg: "two",
       val: "new",
       val2: "another",
       count: 3,
     });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toBe(fn("two"));
 
     other = "default";
 
-    assert.deepEqual(fn("one"), {
+    expect(fn("one")).toEqual({
       arg: "one",
       val: "default",
       val2: "another",
       count: 4,
     });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), {
+    expect(fn("two")).toEqual({
       arg: "two",
       val: "default",
       val2: "another",
       count: 5,
     });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toBe(fn("two"));
 
     other = "new";
 
-    assert.deepEqual(fn("one"), {
+    expect(fn("one")).toEqual({
       arg: "one",
       val: "new",
       val2: "another",
       count: 6,
     });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), {
+    expect(fn("two")).toEqual({
       arg: "two",
       val: "new",
       val2: "another",
       count: 7,
     });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toBe(fn("two"));
 
     another = "second";
 
-    assert.deepEqual(fn("one"), {
+    expect(fn("one")).toEqual({
       arg: "one",
       val: "new",
       val2: "second",
       count: 8,
     });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), {
+    expect(fn("two")).toEqual({
       arg: "two",
       val: "new",
       val2: "second",
       count: 9,
     });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toBe(fn("two"));
   });
 
   it("should auto-permacache by default", () => {
@@ -226,13 +225,13 @@ describe("caching API", () => {
 
     const fn = makeStrongCache(arg => ({ arg, count: count++ }));
 
-    assert.deepEqual(fn("one"), { arg: "one", count: 0 });
-    assert.equal(fn("one"), fn("one"));
+    expect(fn("one")).toEqual({ arg: "one", count: 0 });
+    expect(fn("one")).toBe(fn("one"));
 
-    assert.deepEqual(fn("two"), { arg: "two", count: 1 });
-    assert.equal(fn("two"), fn("two"));
+    expect(fn("two")).toEqual({ arg: "two", count: 1 });
+    expect(fn("two")).toBe(fn("two"));
 
-    assert.notEqual(fn("one"), fn("two"));
+    expect(fn("one")).not.toEqual(fn("two"));
   });
 
   it("should throw if you set permacaching and use .using", () => {
@@ -242,7 +241,7 @@ describe("caching API", () => {
       cache.using(() => null);
     });
 
-    assert.throws(() => fn(), /Caching has already been configured/);
+    expect(() => fn()).toThrow(/Caching has already been configured/);
   });
 
   it("should throw if you set permacaching and use .invalidate", () => {
@@ -252,7 +251,7 @@ describe("caching API", () => {
       cache.invalidate(() => null);
     });
 
-    assert.throws(() => fn(), /Caching has already been configured/);
+    expect(() => fn()).toThrow(/Caching has already been configured/);
   });
 
   it("should throw if you set permacaching and use .never", () => {
@@ -262,7 +261,7 @@ describe("caching API", () => {
       cache.never();
     });
 
-    assert.throws(() => fn(), /Caching has already been configured/);
+    expect(() => fn()).toThrow(/Caching has already been configured/);
   });
 
   it("should throw if you set no caching and use .using", () => {
@@ -272,7 +271,7 @@ describe("caching API", () => {
       cache.using(() => null);
     });
 
-    assert.throws(() => fn(), /Caching has already been configured/);
+    expect(() => fn()).toThrow(/Caching has already been configured/);
   });
 
   it("should throw if you set no caching and use .invalidate", () => {
@@ -282,7 +281,7 @@ describe("caching API", () => {
       cache.invalidate(() => null);
     });
 
-    assert.throws(() => fn(), /Caching has already been configured/);
+    expect(() => fn()).toThrow(/Caching has already been configured/);
   });
 
   it("should throw if you set no caching and use .never", () => {
@@ -292,14 +291,13 @@ describe("caching API", () => {
       cache.using(() => null);
     });
 
-    assert.throws(() => fn(), /Caching has already been configured/);
+    expect(() => fn()).toThrow(/Caching has already been configured/);
   });
 
   it("should throw if you configure .forever after exiting", () => {
     const fn = makeStrongCache((arg, cache) => cache);
 
-    assert.throws(
-      () => fn().forever(),
+    expect(() => fn().forever()).toThrow(
       /Cannot change caching after evaluation/,
     );
   });
@@ -307,14 +305,15 @@ describe("caching API", () => {
   it("should throw if you configure .never after exiting", () => {
     const fn = makeStrongCache((arg, cache) => cache);
 
-    assert.throws(() => fn().never(), /Cannot change caching after evaluation/);
+    expect(() => fn().never()).toThrow(
+      /Cannot change caching after evaluation/,
+    );
   });
 
   it("should throw if you configure .using after exiting", () => {
     const fn = makeStrongCache((arg, cache) => cache);
 
-    assert.throws(
-      () => fn().using(() => null),
+    expect(() => fn().using(() => null)).toThrow(
       /Cannot change caching after evaluation/,
     );
   });
@@ -322,8 +321,7 @@ describe("caching API", () => {
   it("should throw if you configure .invalidate after exiting", () => {
     const fn = makeStrongCache((arg, cache) => cache);
 
-    assert.throws(
-      () => fn().invalidate(() => null),
+    expect(() => fn().invalidate(() => null)).toThrow(
       /Cannot change caching after evaluation/,
     );
   });
@@ -339,13 +337,13 @@ describe("caching API", () => {
         return { arg, count: count++ };
       });
 
-      assert.deepEqual(fn("one"), { arg: "one", count: 0 });
-      assert.equal(fn("one"), fn("one"));
+      expect(fn("one")).toEqual({ arg: "one", count: 0 });
+      expect(fn("one")).toBe(fn("one"));
 
-      assert.deepEqual(fn("two"), { arg: "two", count: 1 });
-      assert.equal(fn("two"), fn("two"));
+      expect(fn("two")).toEqual({ arg: "two", count: 1 });
+      expect(fn("two")).toBe(fn("two"));
 
-      assert.notEqual(fn("one"), fn("two"));
+      expect(fn("one")).not.toEqual(fn("two"));
     });
 
     it("should allow disabling caching with cache(false)", () => {
@@ -358,15 +356,15 @@ describe("caching API", () => {
         return { arg, count: count++ };
       });
 
-      assert.deepEqual(fn("one"), { arg: "one", count: 0 });
-      assert.deepEqual(fn("one"), { arg: "one", count: 1 });
-      assert.notEqual(fn("one"), fn("one"));
+      expect(fn("one")).toEqual({ arg: "one", count: 0 });
+      expect(fn("one")).toEqual({ arg: "one", count: 1 });
+      expect(fn("one")).not.toEqual(fn("one"));
 
-      assert.deepEqual(fn("two"), { arg: "two", count: 4 });
-      assert.deepEqual(fn("two"), { arg: "two", count: 5 });
-      assert.notEqual(fn("two"), fn("two"));
+      expect(fn("two")).toEqual({ arg: "two", count: 4 });
+      expect(fn("two")).toEqual({ arg: "two", count: 5 });
+      expect(fn("two")).not.toEqual(fn("two"));
 
-      assert.notEqual(fn("one"), fn("two"));
+      expect(fn("one")).not.toEqual(fn("two"));
     });
 
     it("should allow caching based on a value with cache(fn)", () => {
@@ -381,35 +379,35 @@ describe("caching API", () => {
         return { arg, val, count: count++ };
       });
 
-      assert.deepEqual(fn("one"), { arg: "one", val: "default", count: 0 });
-      assert.equal(fn("one"), fn("one"));
+      expect(fn("one")).toEqual({ arg: "one", val: "default", count: 0 });
+      expect(fn("one")).toBe(fn("one"));
 
-      assert.deepEqual(fn("two"), { arg: "two", val: "default", count: 1 });
-      assert.equal(fn("two"), fn("two"));
+      expect(fn("two")).toEqual({ arg: "two", val: "default", count: 1 });
+      expect(fn("two")).toBe(fn("two"));
 
       other = "new";
 
-      assert.deepEqual(fn("one"), { arg: "one", val: "new", count: 2 });
-      assert.equal(fn("one"), fn("one"));
+      expect(fn("one")).toEqual({ arg: "one", val: "new", count: 2 });
+      expect(fn("one")).toBe(fn("one"));
 
-      assert.deepEqual(fn("two"), { arg: "two", val: "new", count: 3 });
-      assert.equal(fn("two"), fn("two"));
+      expect(fn("two")).toEqual({ arg: "two", val: "new", count: 3 });
+      expect(fn("two")).toBe(fn("two"));
 
       other = "default";
 
-      assert.deepEqual(fn("one"), { arg: "one", val: "default", count: 0 });
-      assert.equal(fn("one"), fn("one"));
+      expect(fn("one")).toEqual({ arg: "one", val: "default", count: 0 });
+      expect(fn("one")).toBe(fn("one"));
 
-      assert.deepEqual(fn("two"), { arg: "two", val: "default", count: 1 });
-      assert.equal(fn("two"), fn("two"));
+      expect(fn("two")).toEqual({ arg: "two", val: "default", count: 1 });
+      expect(fn("two")).toBe(fn("two"));
 
       other = "new";
 
-      assert.deepEqual(fn("one"), { arg: "one", val: "new", count: 2 });
-      assert.equal(fn("one"), fn("one"));
+      expect(fn("one")).toEqual({ arg: "one", val: "new", count: 2 });
+      expect(fn("one")).toBe(fn("one"));
 
-      assert.deepEqual(fn("two"), { arg: "two", val: "new", count: 3 });
-      assert.equal(fn("two"), fn("two"));
+      expect(fn("two")).toEqual({ arg: "two", val: "new", count: 3 });
+      expect(fn("two")).toBe(fn("two"));
     });
   });
 });
diff --git a/packages/babel-core/test/config-chain.js b/packages/babel-core/test/config-chain.js
index f40ae9989b59b..06cd44f5a75a2 100644
--- a/packages/babel-core/test/config-chain.js
+++ b/packages/babel-core/test/config-chain.js
@@ -1,4 +1,3 @@
-import assert from "assert";
 import fs from "fs";
 import path from "path";
 import { loadOptions } from "../lib";
@@ -18,7 +17,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process matching RegExp values", () => {
@@ -29,7 +28,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process matching function values", () => {
@@ -40,7 +39,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process non-matching string values", () => {
@@ -51,7 +50,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process non-matching RegExp values", () => {
@@ -62,7 +61,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process non-matching function values", () => {
@@ -73,7 +72,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
     });
 
@@ -86,7 +85,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process matching RegExp values", () => {
@@ -97,7 +96,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process matching function values", () => {
@@ -108,7 +107,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process non-matching string values", () => {
@@ -119,7 +118,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process non-matching RegExp values", () => {
@@ -130,7 +129,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process non-matching function values", () => {
@@ -141,7 +140,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
     });
   });
@@ -156,7 +155,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process matching RegExp values", () => {
@@ -167,7 +166,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process matching function values", () => {
@@ -178,7 +177,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process non-matching string values", () => {
@@ -189,7 +188,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process non-matching RegExp values", () => {
@@ -200,7 +199,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process non-matching function values", () => {
@@ -211,7 +210,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
     });
 
@@ -224,7 +223,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process matching RegExp values", () => {
@@ -235,7 +234,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process matching function values", () => {
@@ -246,7 +245,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process non-matching string values", () => {
@@ -257,7 +256,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process non-matching RegExp values", () => {
@@ -268,7 +267,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process non-matching function values", () => {
@@ -279,7 +278,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
     });
   });
@@ -294,7 +293,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process matching RegExp values", () => {
@@ -305,7 +304,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process matching function values", () => {
@@ -316,7 +315,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process non-matching string values", () => {
@@ -327,7 +326,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process non-matching RegExp values", () => {
@@ -338,7 +337,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process non-matching function values", () => {
@@ -349,7 +348,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
     });
 
@@ -362,7 +361,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process matching RegExp values", () => {
@@ -373,7 +372,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process matching function values", () => {
@@ -384,7 +383,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, undefined);
+        expect(opts.comments).toBeUndefined();
       });
 
       it("should process non-matching string values", () => {
@@ -395,7 +394,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process non-matching RegExp values", () => {
@@ -406,7 +405,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
 
       it("should process non-matching function values", () => {
@@ -417,7 +416,7 @@ describe("buildConfigChain", function() {
           comments: true,
         });
 
-        assert.equal(opts.comments, true);
+        expect(opts.comments).toBe(true);
       });
     });
   });
@@ -437,7 +436,7 @@ describe("buildConfigChain", function() {
         ],
       });
 
-      assert.equal(opts, null);
+      expect(opts).toBeNull();
     });
 
     it("should not ignore files that don't match", () => {
@@ -450,7 +449,7 @@ describe("buildConfigChain", function() {
         ],
       });
 
-      assert.notEqual(opts, null);
+      expect(opts).not.toBeNull();
     });
   });
 
@@ -465,7 +464,7 @@ describe("buildConfigChain", function() {
         ],
       });
 
-      assert.equal(opts, null);
+      expect(opts).toBeNull();
     });
 
     it("should not ignore files that match", () => {
@@ -478,7 +477,7 @@ describe("buildConfigChain", function() {
         ],
       });
 
-      assert.notEqual(opts, null);
+      expect(opts).not.toBeNull();
     });
   });
 
@@ -491,7 +490,7 @@ describe("buildConfigChain", function() {
         only: [],
       });
 
-      assert.equal(opts, null);
+      expect(opts).toBeNull();
     });
 
     it("should ignore files that match ignore and also only", () => {
@@ -502,7 +501,7 @@ describe("buildConfigChain", function() {
         only: [fixture("nonexistant-fake", "src.js")],
       });
 
-      assert.equal(opts, null);
+      expect(opts).toBeNull();
     });
 
     it("should not ignore files that match only and not ignore", () => {
@@ -512,7 +511,7 @@ describe("buildConfigChain", function() {
         only: [fixture("nonexistant-fake", "src.js")],
       });
 
-      assert.notEqual(opts, null);
+      expect(opts).not.toBeNull();
     });
 
     it("should not ignore files when no ignore/only are specified", () => {
@@ -521,7 +520,7 @@ describe("buildConfigChain", function() {
         babelrc: false,
       });
 
-      assert.notEqual(opts, null);
+      expect(opts).not.toBeNull();
     });
 
     it("should allow negation of only", () => {
@@ -533,7 +532,7 @@ describe("buildConfigChain", function() {
           fixture("nonexistant-fake", "other.js"),
         ],
       });
-      assert.equal(opts1, null);
+      expect(opts1).toBeNull();
 
       const opts2 = loadOptions({
         filename: fixture("nonexistant-fake", "src.js"),
@@ -543,7 +542,7 @@ describe("buildConfigChain", function() {
           fixture("nonexistant-fake", "src.js"),
         ],
       });
-      assert.notEqual(opts2, null);
+      expect(opts2).not.toBeNull();
 
       const opts3 = loadOptions({
         filename: fixture("nonexistant-fake", "folder", "src.js"),
@@ -553,7 +552,7 @@ describe("buildConfigChain", function() {
           fixture("nonexistant-fake", "folder"),
         ],
       });
-      assert.notEqual(opts3, null);
+      expect(opts3).not.toBeNull();
     });
 
     it("should allow negation of ignore", () => {
@@ -565,7 +564,7 @@ describe("buildConfigChain", function() {
           fixture("nonexistant-fake"),
         ],
       });
-      assert.equal(opts1, null);
+      expect(opts1).toBeNull();
 
       // Tests disabled pending https://github.com/babel/babel/issues/6907
       // const opts2 = loadOptions({
@@ -603,9 +602,9 @@ describe("buildConfigChain", function() {
         inputOpts.plugins = plugins2;
         const opts2 = loadOptions(inputOpts);
 
-        assert.equal(opts1.plugins.length, 1);
-        assert.equal(opts2.plugins.length, 1);
-        assert.notEqual(opts1.plugins[0], opts2.plugins[1]);
+        expect(opts1.plugins).toHaveLength(1);
+        expect(opts2.plugins).toHaveLength(1);
+        expect(opts1.plugins[0]).not.toBe(opts2.plugins[1]);
       });
 
       it("should cache the env plugins by identity", () => {
@@ -628,9 +627,9 @@ describe("buildConfigChain", function() {
           },
         });
 
-        assert.equal(opts1.plugins.length, 1);
-        assert.equal(opts2.plugins.length, 1);
-        assert.equal(opts1.plugins[0], opts2.plugins[0]);
+        expect(opts1.plugins).toHaveLength(1);
+        expect(opts2.plugins).toHaveLength(1);
+        expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
       });
 
       it("should cache the env presets by identity", () => {
@@ -653,9 +652,9 @@ describe("buildConfigChain", function() {
           },
         });
 
-        assert.equal(opts1.plugins.length, 1);
-        assert.equal(opts2.plugins.length, 1);
-        assert.equal(opts1.plugins[0], opts2.plugins[0]);
+        expect(opts1.plugins).toHaveLength(1);
+        expect(opts2.plugins).toHaveLength(1);
+        expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
       });
 
       it("should cache the plugin options by identity", () => {
@@ -664,9 +663,9 @@ describe("buildConfigChain", function() {
         const opts1 = loadOptions({ plugins });
         const opts2 = loadOptions({ plugins });
 
-        assert.equal(opts1.plugins.length, 1);
-        assert.equal(opts2.plugins.length, 1);
-        assert.equal(opts1.plugins[0], opts2.plugins[0]);
+        expect(opts1.plugins).toHaveLength(1);
+        expect(opts2.plugins).toHaveLength(1);
+        expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
       });
 
       it("should cache the presets options by identity", () => {
@@ -675,9 +674,9 @@ describe("buildConfigChain", function() {
         const opts1 = loadOptions({ presets });
         const opts2 = loadOptions({ presets });
 
-        assert.equal(opts1.plugins.length, 1);
-        assert.equal(opts2.plugins.length, 1);
-        assert.strictEqual(opts1.plugins[0], opts2.plugins[0]);
+        expect(opts1.plugins).toHaveLength(1);
+        expect(opts2.plugins).toHaveLength(1);
+        expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
       });
 
       it("should not cache the presets options with passPerPreset", () => {
@@ -687,11 +686,11 @@ describe("buildConfigChain", function() {
         const opts2 = loadOptions({ presets, passPerPreset: true });
         const opts3 = loadOptions({ presets, passPerPreset: false });
 
-        assert.equal(opts1.plugins.length, 1);
-        assert.equal(opts2.plugins.length, 0);
-        assert.equal(opts3.plugins.length, 1);
+        expect(opts1.plugins).toHaveLength(1);
+        expect(opts2.plugins).toHaveLength(0);
+        expect(opts3.plugins).toHaveLength(1);
 
-        assert.strictEqual(opts1.plugins[0], opts3.plugins[0]);
+        expect(opts1.plugins[0]).toBe(opts3.plugins[0]);
       });
     });
 
@@ -727,16 +726,16 @@ describe("buildConfigChain", function() {
         const opts3 = loadOptions({ filename });
         const opts4 = loadOptions({ filename });
 
-        assert.equal(opts1.plugins.length, 1);
-        assert.equal(opts2.plugins.length, 1);
-        assert.equal(opts1.plugins[0], opts2.plugins[0]);
+        expect(opts1.plugins).toHaveLength(1);
+        expect(opts2.plugins).toHaveLength(1);
+        expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
 
-        assert.equal(opts3.plugins.length, 1);
-        assert.equal(opts4.plugins.length, 1);
-        assert.equal(opts3.plugins[0], opts4.plugins[0]);
+        expect(opts1.plugins).toHaveLength(1);
+        expect(opts2.plugins).toHaveLength(1);
+        expect(opts3.plugins[0]).toBe(opts4.plugins[0]);
 
         // Identity changed after touch().
-        assert.notEqual(opts1.plugins[0], opts3.plugins[0]);
+        expect(opts1.plugins[0]).not.toBe(opts3.plugins[0]);
       });
 
       it("should cache .babelrc files by mtime", () => {
@@ -761,16 +760,16 @@ describe("buildConfigChain", function() {
         const opts3 = loadOptions({ filename });
         const opts4 = loadOptions({ filename });
 
-        assert.equal(opts1.plugins.length, 1);
-        assert.equal(opts2.plugins.length, 1);
-        assert.equal(opts1.plugins[0], opts2.plugins[0]);
+        expect(opts1.plugins).toHaveLength(1);
+        expect(opts2.plugins).toHaveLength(1);
+        expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
 
-        assert.equal(opts3.plugins.length, 1);
-        assert.equal(opts4.plugins.length, 1);
-        assert.equal(opts3.plugins[0], opts4.plugins[0]);
+        expect(opts3.plugins).toHaveLength(1);
+        expect(opts4.plugins).toHaveLength(1);
+        expect(opts3.plugins[0]).toBe(opts4.plugins[0]);
 
         // Identity changed after touch().
-        assert.notEqual(opts1.plugins[0], opts3.plugins[0]);
+        expect(opts1.plugins[0]).not.toBe(opts3.plugins[0]);
       });
 
       it("should cache .babelrc.js files programmable behavior", () => {
@@ -787,16 +786,16 @@ describe("buildConfigChain", function() {
         const opts3 = loadOptions({ filename, envName: "new-env" });
         const opts4 = loadOptions({ filename, envName: "new-env" });
 
-        assert.equal(opts1.plugins.length, 1);
-        assert.equal(opts2.plugins.length, 1);
-        assert.equal(opts1.plugins[0], opts2.plugins[0]);
+        expect(opts1.plugins).toHaveLength(1);
+        expect(opts2.plugins).toHaveLength(1);
+        expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
 
-        assert.equal(opts3.plugins.length, 1);
-        assert.equal(opts4.plugins.length, 1);
-        assert.equal(opts3.plugins[0], opts4.plugins[0]);
+        expect(opts3.plugins).toHaveLength(1);
+        expect(opts4.plugins).toHaveLength(1);
+        expect(opts3.plugins[0]).toBe(opts4.plugins[0]);
 
         // Identity changed with different .env
-        assert.notEqual(opts1.plugins[0], opts3.plugins[0]);
+        expect(opts1.plugins[0]).not.toBe(opts3.plugins[0]);
       });
     });
   });
@@ -815,7 +814,7 @@ describe("buildConfigChain", function() {
         ],
       });
 
-      assert.equal(opts.comments, false);
+      expect(opts.comments).toBe(false);
     });
 
     it("should not apply non-matching overrides over base configs", () => {
@@ -831,7 +830,7 @@ describe("buildConfigChain", function() {
         ],
       });
 
-      assert.equal(opts.comments, true);
+      expect(opts.comments).toBe(true);
     });
   });
 
@@ -844,11 +843,24 @@ describe("buildConfigChain", function() {
       plugins: [],
       presets: [],
     });
+    const realEnv = process.env.NODE_ENV;
+    const realBabelEnv = process.env.BABEL_ENV;
+
+    beforeAll(() => {
+      delete process.env.NODE_ENV;
+      delete process.env.BABEL_ENV;
+    });
+    afterAll(() => {
+      if (realEnv) {
+        process.env.NODE_ENV = realEnv;
+        process.env.NODE_ENV = realBabelEnv;
+      }
+    });
 
     it("should load .babelrc", () => {
       const filename = fixture("config-files", "babelrc", "src.js");
 
-      assert.deepEqual(loadOptions({ filename }), {
+      expect(loadOptions({ filename })).toEqual({
         ...getDefaults(),
         filename,
         comments: true,
@@ -858,7 +870,7 @@ describe("buildConfigChain", function() {
     it("should load .babelrc.js", () => {
       const filename = fixture("config-files", "babelrc-js", "src.js");
 
-      assert.deepEqual(loadOptions({ filename }), {
+      expect(loadOptions({ filename })).toEqual({
         ...getDefaults(),
         filename,
         comments: true,
@@ -868,7 +880,7 @@ describe("buildConfigChain", function() {
     it("should load package.json#babel", () => {
       const filename = fixture("config-files", "pkg", "src.js");
 
-      assert.deepEqual(loadOptions({ filename }), {
+      expect(loadOptions({ filename })).toEqual({
         ...getDefaults(),
         filename,
         comments: true,
@@ -878,14 +890,13 @@ describe("buildConfigChain", function() {
     it("should load .babelignore", () => {
       const filename = fixture("config-files", "babelignore", "src.js");
 
-      assert.deepEqual(loadOptions({ filename }), null);
+      expect(loadOptions({ filename })).toBeNull();
     });
 
     it("should throw if there are both .babelrc and .babelrc.js", () => {
       const filename = fixture("config-files", "both-babelrc", "src.js");
 
-      assert.throws(
-        () => loadOptions({ filename }),
+      expect(() => loadOptions({ filename })).toThrow(
         /Multiple configuration files found/,
       );
     });
@@ -893,8 +904,7 @@ describe("buildConfigChain", function() {
     it("should throw if there are both .babelrc and package.json", () => {
       const filename = fixture("config-files", "pkg-babelrc", "src.js");
 
-      assert.throws(
-        () => loadOptions({ filename }),
+      expect(() => loadOptions({ filename })).toThrow(
         /Multiple configuration files found/,
       );
     });
@@ -902,8 +912,7 @@ describe("buildConfigChain", function() {
     it("should throw if there are both .babelrc.js and package.json", () => {
       const filename = fixture("config-files", "pkg-babelrc-js", "src.js");
 
-      assert.throws(
-        () => loadOptions({ filename }),
+      expect(() => loadOptions({ filename })).toThrow(
         /Multiple configuration files found/,
       );
     });
@@ -911,7 +920,7 @@ describe("buildConfigChain", function() {
     it("should ignore package.json without a 'babel' property", () => {
       const filename = fixture("config-files", "pkg-ignored", "src.js");
 
-      assert.deepEqual(loadOptions({ filename }), {
+      expect(loadOptions({ filename })).toEqual({
         ...getDefaults(),
         filename,
         comments: true,
@@ -921,8 +930,7 @@ describe("buildConfigChain", function() {
     it("should show helpful errors for .babelrc", () => {
       const filename = fixture("config-files", "babelrc-error", "src.js");
 
-      assert.throws(
-        () => loadOptions({ filename }),
+      expect(() => loadOptions({ filename })).toThrow(
         /Error while parsing config - /,
       );
     });
@@ -930,14 +938,13 @@ describe("buildConfigChain", function() {
     it("should show helpful errors for .babelrc.js", () => {
       const filename = fixture("config-files", "babelrc-js-error", "src.js");
 
-      assert.throws(() => loadOptions({ filename }), /Babelrc threw an error/);
+      expect(() => loadOptions({ filename })).toThrow(/Babelrc threw an error/);
     });
 
     it("should show helpful errors for package.json", () => {
       const filename = fixture("config-files", "pkg-error", "src.js");
 
-      assert.throws(
-        () => loadOptions({ filename }),
+      expect(() => loadOptions({ filename })).toThrow(
         /Error while parsing JSON - /,
       );
     });
diff --git a/packages/babel-core/test/config-loading.js b/packages/babel-core/test/config-loading.js
index 130cdb386a9e1..c2787f39c2104 100644
--- a/packages/babel-core/test/config-loading.js
+++ b/packages/babel-core/test/config-loading.js
@@ -1,6 +1,5 @@
 import loadConfig from "../lib/config";
 import path from "path";
-import { expect } from "chai";
 
 describe("@babel/core config loading", () => {
   const FILEPATH = path.join(
@@ -41,7 +40,7 @@ describe("@babel/core config loading", () => {
       const opts = makeOpts();
 
       const options1 = loadConfig(opts).options;
-      expect(options1.plugins.map(p => p.key)).to.eql([
+      expect(options1.plugins.map(p => p.key)).toEqual([
         "plugin1",
         "plugin2",
         "plugin6",
@@ -51,16 +50,16 @@ describe("@babel/core config loading", () => {
       ]);
 
       const options2 = loadConfig(opts).options;
-      expect(options2.plugins.length).to.equal(options1.plugins.length);
+      expect(options2.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options2.plugins.length; i++) {
-        expect(options2.plugins[i]).to.equal(options1.plugins[i]);
+        expect(options2.plugins[i]).toBe(options1.plugins[i]);
       }
     });
 
     it("should load and cache the config for unique opts objects", () => {
       const options1 = loadConfig(makeOpts(true)).options;
-      expect(options1.plugins.map(p => p.key)).to.eql([
+      expect(options1.plugins.map(p => p.key)).toEqual([
         "plugin1",
         "plugin2",
         "plugin4",
@@ -68,10 +67,10 @@ describe("@babel/core config loading", () => {
       ]);
 
       const options2 = loadConfig(makeOpts(true)).options;
-      expect(options2.plugins.length).to.equal(options1.plugins.length);
+      expect(options2.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options2.plugins.length; i++) {
-        expect(options2.plugins[i]).to.equal(options1.plugins[i]);
+        expect(options2.plugins[i]).toBe(options1.plugins[i]);
       }
     });
 
@@ -83,26 +82,26 @@ describe("@babel/core config loading", () => {
       process.env.INVALIDATE_PLUGIN1 = true;
 
       const options2 = loadConfig(opts).options;
-      expect(options2.plugins.length).to.equal(options1.plugins.length);
+      expect(options2.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options1.plugins.length; i++) {
         if (i === 0) {
-          expect(options2.plugins[i]).not.to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).not.toBe(options1.plugins[i]);
         } else {
-          expect(options2.plugins[i]).to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).toBe(options1.plugins[i]);
         }
       }
 
       process.env.INVALIDATE_PLUGIN3 = true;
 
       const options3 = loadConfig(opts).options;
-      expect(options3.plugins.length).to.equal(options1.plugins.length);
+      expect(options3.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options1.plugins.length; i++) {
         if (i === 0 || i === 5) {
-          expect(options3.plugins[i]).not.to.equal(options1.plugins[i]);
+          expect(options3.plugins[i]).not.toBe(options1.plugins[i]);
         } else {
-          expect(options3.plugins[i]).to.equal(options1.plugins[i]);
+          expect(options3.plugins[i]).toBe(options1.plugins[i]);
         }
       }
     });
@@ -115,26 +114,26 @@ describe("@babel/core config loading", () => {
       process.env.INVALIDATE_PRESET1 = true;
 
       const options2 = loadConfig(opts).options;
-      expect(options2.plugins.length).to.equal(options1.plugins.length);
+      expect(options2.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options1.plugins.length; i++) {
         if (i === 5) {
-          expect(options2.plugins[i]).not.to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).not.toBe(options1.plugins[i]);
         } else {
-          expect(options2.plugins[i]).to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).toBe(options1.plugins[i]);
         }
       }
 
       process.env.INVALIDATE_PRESET2 = true;
 
       const options3 = loadConfig(opts).options;
-      expect(options3.plugins.length).to.equal(options1.plugins.length);
+      expect(options3.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options1.plugins.length; i++) {
         if (i === 4 || i === 5) {
-          expect(options3.plugins[i]).not.to.equal(options1.plugins[i]);
+          expect(options3.plugins[i]).not.toBe(options1.plugins[i]);
         } else {
-          expect(options3.plugins[i]).to.equal(options1.plugins[i]);
+          expect(options3.plugins[i]).toBe(options1.plugins[i]);
         }
       }
     });
@@ -147,13 +146,13 @@ describe("@babel/core config loading", () => {
       process.env.INVALIDATE_BABELRC = true;
 
       const options2 = loadConfig(opts).options;
-      expect(options2.plugins.length).to.equal(options1.plugins.length);
+      expect(options2.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options1.plugins.length; i++) {
         if (i === 0 || i === 1 || i === 4 || i === 5 || i === 6) {
-          expect(options2.plugins[i]).not.to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).not.toBe(options1.plugins[i]);
         } else {
-          expect(options2.plugins[i]).to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).toBe(options1.plugins[i]);
         }
       }
     });
@@ -166,10 +165,10 @@ describe("@babel/core config loading", () => {
       const options1 = loadConfig(opts).options;
 
       const options2 = loadConfig(Object.assign({}, opts)).options;
-      expect(options2.plugins.length).to.equal(options1.plugins.length);
+      expect(options2.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options2.plugins.length; i++) {
-        expect(options2.plugins[i]).to.equal(options1.plugins[i]);
+        expect(options2.plugins[i]).toBe(options1.plugins[i]);
       }
     });
 
@@ -182,13 +181,13 @@ describe("@babel/core config loading", () => {
         ...opts,
         plugins: opts.plugins.slice(),
       }).options;
-      expect(options2.plugins.length).to.equal(options1.plugins.length);
+      expect(options2.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options2.plugins.length; i++) {
         if (i === 2) {
-          expect(options2.plugins[i]).not.to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).not.toBe(options1.plugins[i]);
         } else {
-          expect(options2.plugins[i]).to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).toBe(options1.plugins[i]);
         }
       }
     });
@@ -202,13 +201,13 @@ describe("@babel/core config loading", () => {
         ...opts,
         presets: opts.presets.slice(),
       }).options;
-      expect(options2.plugins.length).to.equal(options1.plugins.length);
+      expect(options2.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options2.plugins.length; i++) {
         if (i === 3) {
-          expect(options2.plugins[i]).not.to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).not.toBe(options1.plugins[i]);
         } else {
-          expect(options2.plugins[i]).to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).toBe(options1.plugins[i]);
         }
       }
     });
@@ -221,13 +220,13 @@ describe("@babel/core config loading", () => {
       process.env.INVALIDATE_PLUGIN6 = true;
 
       const options2 = loadConfig(opts).options;
-      expect(options2.plugins.length).to.equal(options1.plugins.length);
+      expect(options2.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options1.plugins.length; i++) {
         if (i === 2) {
-          expect(options2.plugins[i]).not.to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).not.toBe(options1.plugins[i]);
         } else {
-          expect(options2.plugins[i]).to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).toBe(options1.plugins[i]);
         }
       }
     });
@@ -240,13 +239,13 @@ describe("@babel/core config loading", () => {
       process.env.INVALIDATE_PRESET3 = true;
 
       const options2 = loadConfig(opts).options;
-      expect(options2.plugins.length).to.equal(options1.plugins.length);
+      expect(options2.plugins.length).toBe(options1.plugins.length);
 
       for (let i = 0; i < options1.plugins.length; i++) {
         if (i === 3) {
-          expect(options2.plugins[i]).not.to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).not.toBe(options1.plugins[i]);
         } else {
-          expect(options2.plugins[i]).to.equal(options1.plugins[i]);
+          expect(options2.plugins[i]).toBe(options1.plugins[i]);
         }
       }
     });
diff --git a/packages/babel-core/test/evaluation.js b/packages/babel-core/test/evaluation.js
index 5b1ea38b80119..2462b8c64e079 100644
--- a/packages/babel-core/test/evaluation.js
+++ b/packages/babel-core/test/evaluation.js
@@ -1,5 +1,4 @@
 import traverse from "@babel/traverse";
-import assert from "assert";
 import { parse } from "babylon";
 
 describe("evaluation", function() {
@@ -9,8 +8,8 @@ describe("evaluation", function() {
 
       visitor[type] = function(path) {
         const evaluate = path.evaluate();
-        assert.equal(evaluate.confident, !notConfident);
-        assert.deepEqual(evaluate.value, value);
+        expect(evaluate.confident).toEqual(!notConfident);
+        expect(evaluate.value).toEqual(value);
       };
 
       traverse(
diff --git a/packages/babel-core/test/fixtures/parse/output.json b/packages/babel-core/test/fixtures/parse/output.json
index 7c9e1c3f4d303..42395528d1566 100644
--- a/packages/babel-core/test/fixtures/parse/output.json
+++ b/packages/babel-core/test/fixtures/parse/output.json
@@ -1,29 +1,29 @@
 {
   "type": "File",
   "start": 0,
-  "end": 90,
+  "end": 91,
   "loc": {
     "start": {
       "line": 1,
       "column": 0
     },
     "end": {
-      "line": 6,
-      "column": 1
+      "line": 7,
+      "column": 0
     }
   },
   "program": {
     "type": "Program",
     "start": 0,
-    "end": 90,
+    "end": 91,
     "loc": {
       "start": {
         "line": 1,
         "column": 0
       },
       "end": {
-        "line": 6,
-        "column": 1
+        "line": 7,
+        "column": 0
       }
     },
     "sourceType": "module",
diff --git a/packages/babel-core/test/fixtures/plugins/nested-if-alternate/exec.js b/packages/babel-core/test/fixtures/plugins/nested-if-alternate/exec.js
index 6bc6fccc2d7ac..769189edddab9 100644
--- a/packages/babel-core/test/fixtures/plugins/nested-if-alternate/exec.js
+++ b/packages/babel-core/test/fixtures/plugins/nested-if-alternate/exec.js
@@ -18,4 +18,4 @@ var res = transform('', {
   ],
 });
 
-assert.equal(eval(res.code), 23);
+expect(eval(res.code)).toBe(23);
diff --git a/packages/babel-core/test/fixtures/transformation/misc/enforce-newline-modules-blacklist/input.js b/packages/babel-core/test/fixtures/transformation/misc/enforce-newline-modules-blacklist/input.mjs
similarity index 100%
rename from packages/babel-core/test/fixtures/transformation/misc/enforce-newline-modules-blacklist/input.js
rename to packages/babel-core/test/fixtures/transformation/misc/enforce-newline-modules-blacklist/input.mjs
diff --git a/packages/babel-core/test/fixtures/transformation/misc/enforce-newline-modules-blacklist/output.js b/packages/babel-core/test/fixtures/transformation/misc/enforce-newline-modules-blacklist/output.mjs
similarity index 100%
rename from packages/babel-core/test/fixtures/transformation/misc/enforce-newline-modules-blacklist/output.js
rename to packages/babel-core/test/fixtures/transformation/misc/enforce-newline-modules-blacklist/output.mjs
diff --git a/packages/babel-core/test/fixtures/transformation/misc/regression-2892/input.js b/packages/babel-core/test/fixtures/transformation/misc/regression-2892/input.mjs
similarity index 100%
rename from packages/babel-core/test/fixtures/transformation/misc/regression-2892/input.js
rename to packages/babel-core/test/fixtures/transformation/misc/regression-2892/input.mjs
diff --git a/packages/babel-core/test/fixtures/transformation/misc/regression-7064/exec.js b/packages/babel-core/test/fixtures/transformation/misc/regression-7064/exec.js
index 9b94389c6b519..c43064d0594af 100644
--- a/packages/babel-core/test/fixtures/transformation/misc/regression-7064/exec.js
+++ b/packages/babel-core/test/fixtures/transformation/misc/regression-7064/exec.js
@@ -2,20 +2,20 @@ class Bar {
   test() {
     // pass
     (() => {
-      assert.strictEqual(this.constructor, Bar);
+      expect(this.constructor).toBe(Bar);
     })();
 
     // pass
     (() => {
-      assert.strictEqual(this.constructor, Bar);
+      expect(this.constructor).toBe(Bar);
     }).call(this);
 
     (async () => {
-      assert.strictEqual(this.constructor, Bar);
+      expect(this.constructor).toBe(Bar);
     })();
 
     (async () => {
-      assert.strictEqual(this.constructor, Bar);
+      expect(this.constructor).toBe(Bar);
     }).call(this);
   }
 }
diff --git a/packages/babel-core/test/fixtures/transformation/regenerator/default-parameters/exec.js b/packages/babel-core/test/fixtures/transformation/regenerator/default-parameters/exec.js
index 571a83fe25ddb..cbaba7dd4a740 100644
--- a/packages/babel-core/test/fixtures/transformation/regenerator/default-parameters/exec.js
+++ b/packages/babel-core/test/fixtures/transformation/regenerator/default-parameters/exec.js
@@ -2,5 +2,5 @@ function* foo(bar = "bar") {
   return bar;
 }
 
-assert.deepEqual(foo().next().value, "bar");
-assert.deepEqual(foo("foo").next().value, "foo");
+expect(foo().next().value).toBe("bar");
+expect(foo("foo").next().value).toBe("foo");
diff --git a/packages/babel-core/test/fixtures/transformation/regenerator/destructuring-parameters/exec.js b/packages/babel-core/test/fixtures/transformation/regenerator/destructuring-parameters/exec.js
index a434cfd15cc14..8212ec7af66f6 100644
--- a/packages/babel-core/test/fixtures/transformation/regenerator/destructuring-parameters/exec.js
+++ b/packages/babel-core/test/fixtures/transformation/regenerator/destructuring-parameters/exec.js
@@ -2,4 +2,4 @@ function* foo({ bar }) {
   return bar;
 }
 
-assert(foo({ bar: "bar" }).next().value, "bar");
+expect(foo({ bar: "bar" }).next().value).toBe("bar");
diff --git a/packages/babel-core/test/fixtures/transformation/regenerator/destructuring/exec.js b/packages/babel-core/test/fixtures/transformation/regenerator/destructuring/exec.js
index f07586643a692..47138063fbc92 100644
--- a/packages/babel-core/test/fixtures/transformation/regenerator/destructuring/exec.js
+++ b/packages/babel-core/test/fixtures/transformation/regenerator/destructuring/exec.js
@@ -3,14 +3,14 @@ function* foo() {
   return bar;
 }
 
-assert.equal(foo().next().value, "bar");
+expect(foo().next().value).toBe("bar");;
 
 function* foo2({ bar = 0 }) {
   return bar;
 }
 
-assert.equal(foo2({ bar: undefined }).next().value, 0);
-assert.equal(foo2({ bar: 3 }).next().value, 3);
+expect(foo2({ bar: undefined }).next().value).toBe(0);
+expect(foo2({ bar: 3 }).next().value).toBe(3);
 
 function* foo3() {
   loop:
@@ -44,14 +44,14 @@ function* foo3() {
 
 var gen3 = foo3();
 
-assert.equal(gen3.next().value, "iteration");
-assert.equal(gen3.next({what: "one", value: 3}).done, false);
-assert.equal(gen3.next({what: "one", value: 2}).done, true);
+expect(gen3.next().value).toBe("iteration");
+expect(gen3.next({what: "one", value: 3}).done).toBe(false);
+expect(gen3.next({what: "one", value: 2}).done).toBe(true);
 
 var gen4 = foo3();
-assert.equal(gen4.next().value, "iteration");
-assert.equal(gen4.next({what: "two", value: "sometext"}).done, true);
+expect(gen4.next().value).toBe("iteration");
+expect(gen4.next({what: "two", value: "sometext"}).done).toBe(true);
 
 var gen5 = foo3();
-assert.equal(gen5.next().value, "iteration");
-assert.equal(gen5.next({what: "three"}).done, true);
+expect(gen5.next().value).toBe("iteration");
+expect(gen5.next({what: "three"}).done).toBe(true);
diff --git a/packages/babel-core/test/fixtures/transformation/regenerator/rest-parameters/exec.js b/packages/babel-core/test/fixtures/transformation/regenerator/rest-parameters/exec.js
index 22a902435d163..046f0c411f70b 100644
--- a/packages/babel-core/test/fixtures/transformation/regenerator/rest-parameters/exec.js
+++ b/packages/babel-core/test/fixtures/transformation/regenerator/rest-parameters/exec.js
@@ -2,4 +2,4 @@ function* foo(...items) {
   return items;
 }
 
-assert.deepEqual(foo(1, 2, 3).next().value, [1, 2, 3]);
+expect(foo(1, 2, 3).next().value).toEqual([1, 2, 3]);
diff --git a/packages/babel-core/test/fixtures/transformation/source-maps/full/source-map.json b/packages/babel-core/test/fixtures/transformation/source-maps/full/source-map.json
index 93aa0c2509bfc..77952227eacfe 100644
--- a/packages/babel-core/test/fixtures/transformation/source-maps/full/source-map.json
+++ b/packages/babel-core/test/fixtures/transformation/source-maps/full/source-map.json
@@ -1,6 +1,5 @@
 {
   "version": 3,
-  "file": "source-maps/full/output.js",
   "sources": ["source-maps/full/input.js"],
   "names": [
     "arr",
diff --git a/packages/babel-core/test/fixtures/transformation/source-maps/inline/output.js b/packages/babel-core/test/fixtures/transformation/source-maps/inline/output.js
index d297120507820..4d7c7ba70f2b6 100644
--- a/packages/babel-core/test/fixtures/transformation/source-maps/inline/output.js
+++ b/packages/babel-core/test/fixtures/transformation/source-maps/inline/output.js
@@ -1,4 +1,4 @@
 arr.map(function (x) {
   return x * x;
 });
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInNvdXJjZS1tYXBzL2lubGluZS9pbnB1dC5qcyJdLCJuYW1lcyI6WyJhcnIiLCJtYXAiLCJ4Il0sIm1hcHBpbmdzIjoiQUFBQUEsSUFBSUMsR0FBSixDQUFRO0FBQUEsU0FBS0MsSUFBSUEsQ0FBVDtBQUFBLENBQVIiLCJmaWxlIjoic291cmNlLW1hcHMvaW5saW5lL291dHB1dC5qcyIsInNvdXJjZXNDb250ZW50IjpbImFyci5tYXAoeCA9PiB4ICogeCk7Il19
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInNvdXJjZS1tYXBzL2lubGluZS9pbnB1dC5qcyJdLCJuYW1lcyI6WyJhcnIiLCJtYXAiLCJ4Il0sIm1hcHBpbmdzIjoiQUFBQUEsSUFBSUMsR0FBSixDQUFRO0FBQUEsU0FBS0MsSUFBSUEsQ0FBVDtBQUFBLENBQVIiLCJzb3VyY2VzQ29udGVudCI6WyJhcnIubWFwKHggPT4geCAqIHgpOyJdfQ==
diff --git a/packages/babel-core/test/option-manager.js b/packages/babel-core/test/option-manager.js
index dd1d5df74ba47..774b4f01ed1af 100644
--- a/packages/babel-core/test/option-manager.js
+++ b/packages/babel-core/test/option-manager.js
@@ -1,14 +1,13 @@
-import assert from "assert";
 import { loadOptions } from "../lib";
 import path from "path";
 
 describe("option-manager", () => {
   it("throws for babel 5 plugin", () => {
-    return assert.throws(() => {
+    return expect(() => {
       loadOptions({
         plugins: [({ Plugin }) => new Plugin("object-assign", {})],
       });
-    }, /Babel 5 plugin is being run with an unsupported Babel/);
+    }).toThrow(/Babel 5 plugin is being run with an unsupported Babel/);
   });
 
   describe("config plugin/preset flattening and overriding", () => {
@@ -24,12 +23,12 @@ describe("option-manager", () => {
     it("should throw if a plugin is repeated", () => {
       const { calls, plugin } = makePlugin();
 
-      assert.throws(() => {
+      expect(() => {
         loadOptions({
           plugins: [plugin, plugin],
         });
-      }, /Duplicate plugin\/preset detected/);
-      assert.deepEqual(calls, []);
+      }).toThrow(/Duplicate plugin\/preset detected/);
+      expect(calls).toEqual([]);
     });
 
     it("should not throw if a repeated plugin has a different name", () => {
@@ -39,8 +38,8 @@ describe("option-manager", () => {
       loadOptions({
         plugins: [[plugin1, { arg: 1 }], [plugin2, { arg: 2 }, "some-name"]],
       });
-      assert.deepEqual(calls1, [{ arg: 1 }]);
-      assert.deepEqual(calls2, [{ arg: 2 }]);
+      expect(calls1).toEqual([{ arg: 1 }]);
+      expect(calls2).toEqual([{ arg: 2 }]);
     });
 
     it("should merge .env[] plugins with parent presets", () => {
@@ -56,19 +55,19 @@ describe("option-manager", () => {
           },
         },
       });
-      assert.deepEqual(calls1, [{ arg: 3 }]);
-      assert.deepEqual(calls2, [{ arg: 2 }]);
+      expect(calls1).toEqual([{ arg: 3 }]);
+      expect(calls2).toEqual([{ arg: 2 }]);
     });
 
     it("should throw if a preset is repeated", () => {
       const { calls, plugin: preset } = makePlugin();
 
-      assert.throws(() => {
+      expect(() => {
         loadOptions({
           presets: [preset, preset],
-        });
-      }, /Duplicate plugin\/preset detected/);
-      assert.deepEqual(calls, []);
+        }).toThrow(/Duplicate plugin\/preset detected/);
+      });
+      expect(calls).toEqual([]);
     });
 
     it("should not throw if a repeated preset has a different name", () => {
@@ -78,8 +77,8 @@ describe("option-manager", () => {
       loadOptions({
         presets: [[preset1, { arg: 1 }], [preset2, { arg: 2 }, "some-name"]],
       });
-      assert.deepEqual(calls1, [{ arg: 1 }]);
-      assert.deepEqual(calls2, [{ arg: 2 }]);
+      expect(calls1).toEqual([{ arg: 1 }]);
+      expect(calls2).toEqual([{ arg: 2 }]);
     });
 
     it("should merge .env[] presets with parent presets", () => {
@@ -95,8 +94,8 @@ describe("option-manager", () => {
           },
         },
       });
-      assert.deepEqual(calls1, [{ arg: 3 }]);
-      assert.deepEqual(calls2, [{ arg: 2 }]);
+      expect(calls1).toEqual([{ arg: 3 }]);
+      expect(calls2).toEqual([{ arg: 2 }]);
     });
 
     it("should not merge .env[] presets with parent presets when passPerPreset", () => {
@@ -113,41 +112,42 @@ describe("option-manager", () => {
           },
         },
       });
-      assert.deepEqual(calls1, [{ arg: 1 }, { arg: 3 }]);
-      assert.deepEqual(calls2, [{ arg: 2 }]);
+      expect(calls1).toEqual([{ arg: 1 }, { arg: 3 }]);
+      expect(calls2).toEqual([{ arg: 2 }]);
     });
   });
 
   describe("mergeOptions", () => {
     it("throws for removed babel 5 options", () => {
-      return assert.throws(() => {
+      return expect(() => {
         loadOptions({
           randomOption: true,
         });
-      }, /Unknown option: .randomOption/);
+      }).toThrow(/Unknown option: .randomOption/);
     });
 
     it("throws for removed babel 5 options", () => {
-      return assert.throws(
-        () => {
-          loadOptions({
-            auxiliaryComment: true,
-            blacklist: true,
-          });
-        },
+      return expect(() => {
+        loadOptions({
+          auxiliaryComment: true,
+          blacklist: true,
+        });
+      }).toThrow(
         // eslint-disable-next-line max-len
         /Using removed Babel 5 option: .auxiliaryComment - Use `auxiliaryCommentBefore` or `auxiliaryCommentAfter`/,
       );
     });
 
     it("throws for resolved but erroring preset", () => {
-      return assert.throws(() => {
+      return expect(() => {
         loadOptions({
           presets: [
             path.join(__dirname, "fixtures/option-manager/not-a-preset"),
           ],
         });
-      }, /While processing: .*option-manager(?:\/|\\\\)not-a-preset\.js/);
+      }).toThrow(
+        /While processing: .*option-manager(?:\/|\\\\)not-a-preset\.js/,
+      );
     });
   });
 
@@ -160,23 +160,21 @@ describe("option-manager", () => {
           ],
         });
 
-        assert.equal(true, Array.isArray(options.plugins));
-        assert.equal(1, options.plugins.length);
-        assert.equal(0, options.presets.length);
+        expect(Array.isArray(options.plugins)).toBe(true);
+        expect(options.plugins).toHaveLength(1);
+        expect(options.presets).toHaveLength(0);
       });
     }
 
     function presetThrowsTest(name, msg) {
       it(name, function() {
-        assert.throws(
-          () =>
-            loadOptions({
-              presets: [
-                path.join(__dirname, "fixtures/option-manager/presets", name),
-              ],
-            }),
-          msg,
-        );
+        expect(() =>
+          loadOptions({
+            presets: [
+              path.join(__dirname, "fixtures/option-manager/presets", name),
+            ],
+          }),
+        ).toThrow(msg);
       });
     }
 
diff --git a/packages/babel-core/test/parse.js b/packages/babel-core/test/parse.js
index 5663107f043b5..f64ebe968ea7f 100644
--- a/packages/babel-core/test/parse.js
+++ b/packages/babel-core/test/parse.js
@@ -1,4 +1,3 @@
-import assert from "assert";
 import fs from "fs";
 import path from "path";
 import { parse } from "../lib";
@@ -10,16 +9,20 @@ function fixture(...args) {
 describe("parse", function() {
   it("should parse using configuration from .babelrc when a filename is provided", function() {
     const input = fs.readFileSync(fixture("input.js"), "utf8");
-    const output = fs.readFileSync(fixture("output.json"), "utf8");
-    assert(
-      parse(input, { filename: fixture("input.js"), cwd: fixture() }),
-      output,
-    );
+    const output = require(fixture("output"));
+
+    const result = parse(input, {
+      filename: fixture("input.js"),
+      cwd: fixture(),
+    });
+    expect(JSON.parse(JSON.stringify(result))).toEqual(output);
   });
 
   it("should parse using passed in configuration", function() {
     const input = fs.readFileSync(fixture("input.js"), "utf8");
-    const output = fs.readFileSync(fixture("output.json"), "utf8");
-    assert(parse(input, { parserOpts: { plugins: ["decorators"] } }), output);
+    const output = require(fixture("output.json"));
+
+    const result = parse(input, { parserOpts: { plugins: ["decorators"] } });
+    expect(JSON.parse(JSON.stringify(result))).toEqual(output);
   });
 });
diff --git a/packages/babel-core/test/path.js b/packages/babel-core/test/path.js
index 7e68d893a0513..eba8db9c1e8f1 100644
--- a/packages/babel-core/test/path.js
+++ b/packages/babel-core/test/path.js
@@ -1,6 +1,5 @@
 import { transform } from "../lib/index";
 import Plugin from "../lib/config/plugin";
-import chai from "chai";
 
 describe("traversal path", function() {
   it("replaceWithSourceString", function() {
@@ -18,7 +17,7 @@ describe("traversal path", function() {
       ],
     }).code;
 
-    chai.expect(actualCode).to.be.equal("console.whatever();");
+    expect(actualCode).toBe("console.whatever();");
   });
 
   it("replaceWith (arrow expression body to block statement body)", function() {
@@ -47,7 +46,7 @@ describe("traversal path", function() {
       ],
     }).code;
 
-    chai.expect(actualCode).to.be.equal("var fn = () => {\n  return true;\n};");
+    expect(actualCode).toBe("var fn = () => {\n  return true;\n};");
   });
 
   it("replaceWith (arrow block statement body to expression body)", function() {
@@ -68,7 +67,7 @@ describe("traversal path", function() {
       ],
     }).code;
 
-    chai.expect(actualCode).to.be.equal("var fn = () => true;");
+    expect(actualCode).toBe("var fn = () => true;");
   });
 
   it("replaceWith (for-in left expression to variable declaration)", function() {
@@ -98,7 +97,7 @@ describe("traversal path", function() {
       ],
     }).code;
 
-    chai.expect(actualCode).to.be.equal("for (var KEY in right);");
+    expect(actualCode).toBe("for (var KEY in right);");
   });
 
   it("replaceWith (for-in left variable declaration to expression)", function() {
@@ -119,7 +118,7 @@ describe("traversal path", function() {
       ],
     }).code;
 
-    chai.expect(actualCode).to.be.equal("for (KEY in right);");
+    expect(actualCode).toBe("for (KEY in right);");
   });
 
   it("replaceWith (for-loop left expression to variable declaration)", function() {
@@ -149,7 +148,7 @@ describe("traversal path", function() {
       ],
     }).code;
 
-    chai.expect(actualCode).to.be.equal("for (var KEY;;);");
+    expect(actualCode).toBe("for (var KEY;;);");
   });
 
   it("replaceWith (for-loop left variable declaration to expression)", function() {
@@ -170,6 +169,6 @@ describe("traversal path", function() {
       ],
     }).code;
 
-    chai.expect(actualCode).to.be.equal("for (KEY;;);");
+    expect(actualCode).toBe("for (KEY;;);");
   });
 });
diff --git a/packages/babel-core/test/resolution.js b/packages/babel-core/test/resolution.js
index cf95e0fc433aa..7829af16cdb5b 100644
--- a/packages/babel-core/test/resolution.js
+++ b/packages/babel-core/test/resolution.js
@@ -1,17 +1,17 @@
-import assert from "assert";
 import * as babel from "../lib/index";
 import path from "path";
 
 describe("addon resolution", function() {
   const base = path.join(__dirname, "fixtures", "resolution");
+  let cwd;
 
   beforeEach(function() {
-    this.cwd = process.cwd();
+    cwd = process.cwd();
     process.chdir(base);
   });
 
   afterEach(function() {
-    process.chdir(this.cwd);
+    process.chdir(cwd);
   });
 
   it("should find module: presets", function() {
@@ -237,102 +237,114 @@ describe("addon resolution", function() {
   it("should throw about module: usage for presets", function() {
     process.chdir("throw-module-paths");
 
-    assert.throws(() => {
+    expect(() => {
       babel.transform("", {
         filename: "filename.js",
         babelrc: false,
         presets: ["foo"],
       });
       // eslint-disable-next-line max-len
-    }, /Cannot find module 'babel-preset-foo'.*\n- If you want to resolve "foo", use "module:foo"/);
+    }).toThrow(
+      /Cannot find module 'babel-preset-foo'.*\n- If you want to resolve "foo", use "module:foo"/,
+    );
   });
 
   it("should throw about module: usage for plugins", function() {
     process.chdir("throw-module-paths");
 
-    assert.throws(() => {
+    expect(() => {
       babel.transform("", {
         filename: "filename.js",
         babelrc: false,
         plugins: ["foo"],
       });
       // eslint-disable-next-line max-len
-    }, /Cannot find module 'babel-plugin-foo'.*\n- If you want to resolve "foo", use "module:foo"/);
+    }).toThrow(
+      /Cannot find module 'babel-plugin-foo'.*\n- If you want to resolve "foo", use "module:foo"/,
+    );
   });
 
   it("should throw about @babel usage for presets", function() {
     process.chdir("throw-babel-paths");
 
-    assert.throws(() => {
+    expect(() => {
       babel.transform("", {
         filename: "filename.js",
         babelrc: false,
         presets: ["foo"],
       });
       // eslint-disable-next-line max-len
-    }, /Cannot find module 'babel-preset-foo'.*\n- Did you mean "@babel\/foo"\?/);
+    }).toThrow(
+      /Cannot find module 'babel-preset-foo'.*\n- Did you mean "@babel\/foo"\?/,
+    );
   });
 
   it("should throw about @babel usage for plugins", function() {
     process.chdir("throw-babel-paths");
 
-    assert.throws(() => {
+    expect(() => {
       babel.transform("", {
         filename: "filename.js",
         babelrc: false,
         plugins: ["foo"],
       });
       // eslint-disable-next-line max-len
-    }, /Cannot find module 'babel-plugin-foo'.*\n- Did you mean "@babel\/foo"\?/);
+    }).toThrow(
+      /Cannot find module 'babel-plugin-foo'.*\n- Did you mean "@babel\/foo"\?/,
+    );
   });
 
   it("should throw about passing a preset as a plugin", function() {
     process.chdir("throw-opposite-paths");
 
-    assert.throws(() => {
+    expect(() => {
       babel.transform("", {
         filename: "filename.js",
         babelrc: false,
         presets: ["testplugin"],
       });
       // eslint-disable-next-line max-len
-    }, /Cannot find module 'babel-preset-testplugin'.*\n- Did you accidentally pass a preset as a plugin\?/);
+    }).toThrow(
+      /Cannot find module 'babel-preset-testplugin'.*\n- Did you accidentally pass a preset as a plugin\?/,
+    );
   });
 
   it("should throw about passing a plugin as a preset", function() {
     process.chdir("throw-opposite-paths");
 
-    assert.throws(() => {
+    expect(() => {
       babel.transform("", {
         filename: "filename.js",
         babelrc: false,
         plugins: ["testpreset"],
       });
       // eslint-disable-next-line max-len
-    }, /Cannot find module 'babel-plugin-testpreset'.*\n- Did you accidentally pass a plugin as a preset\?/);
+    }).toThrow(
+      /Cannot find module 'babel-plugin-testpreset'.*\n- Did you accidentally pass a plugin as a preset\?/,
+    );
   });
 
   it("should throw about missing presets", function() {
     process.chdir("throw-missing-paths");
 
-    assert.throws(() => {
+    expect(() => {
       babel.transform("", {
         filename: "filename.js",
         babelrc: false,
         presets: ["foo"],
       });
-    }, /Cannot find module 'babel-preset-foo'/);
+    }).toThrow(/Cannot find module 'babel-preset-foo'/);
   });
 
   it("should throw about missing plugins", function() {
     process.chdir("throw-missing-paths");
 
-    assert.throws(() => {
+    expect(() => {
       babel.transform("", {
         filename: "filename.js",
         babelrc: false,
         plugins: ["foo"],
       });
-    }, /Cannot find module 'babel-plugin-foo'/);
+    }).toThrow(/Cannot find module 'babel-plugin-foo'/);
   });
 });
diff --git a/packages/babel-generator/README.md b/packages/babel-generator/README.md
index 6d461291c1143..44725b6047a2c 100644
--- a/packages/babel-generator/README.md
+++ b/packages/babel-generator/README.md
@@ -1,6 +1,6 @@
 # @babel/generator
 
-> Turns an AST into code.
+> Turns a [Babylon AST](https://github.com/babel/babel/blob/master/packages/babylon/ast/spec.md) into code.
 
 ## Install
 
@@ -43,7 +43,6 @@ Options for source maps:
 name                   | type     | default         | description
 -----------------------|----------|-----------------|--------------------------------------------------------------------------
 sourceMaps             | boolean  | `false`         | Enable generating source maps
-sourceMapTarget        | string   |                 | The filename of the generated code that the source map will be associated with
 sourceRoot             | string   |                 | A root for all relative URLs in the source map
 sourceFileName         | string   |                 | The filename for the source code (i.e. the code in the `code` argument).  This will only be used if `code` is a string.
 
diff --git a/packages/babel-generator/package.json b/packages/babel-generator/package.json
index 9258dabe810f5..3ba7b6f566d86 100644
--- a/packages/babel-generator/package.json
+++ b/packages/babel-generator/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/generator",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Turns an AST into code.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -11,14 +11,14 @@
     "lib"
   ],
   "dependencies": {
-    "@babel/types": "7.0.0-beta.39",
+    "@babel/types": "7.0.0-beta.42",
     "jsesc": "^2.5.1",
     "lodash": "^4.2.0",
     "source-map": "^0.5.0",
     "trim-right": "^1.0.1"
   },
   "devDependencies": {
-    "@babel/helper-fixtures": "7.0.0-beta.39",
-    "babylon": "7.0.0-beta.39"
+    "@babel/helper-fixtures": "7.0.0-beta.42",
+    "babylon": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-generator/src/generators/classes.js b/packages/babel-generator/src/generators/classes.js
index fa83be944c5c6..1649cdee39dc6 100644
--- a/packages/babel-generator/src/generators/classes.js
+++ b/packages/babel-generator/src/generators/classes.js
@@ -99,10 +99,13 @@ export function ClassProperty(node: Object) {
     this.print(node.key, node);
   }
 
+  // TS
   if (node.optional) {
-    // TS
     this.token("?");
   }
+  if (node.definite) {
+    this.token("!");
+  }
 
   this.print(node.typeAnnotation, node);
   if (node.value) {
diff --git a/packages/babel-generator/src/generators/statements.js b/packages/babel-generator/src/generators/statements.js
index c3644a4c9303b..e410092a9ed10 100644
--- a/packages/babel-generator/src/generators/statements.js
+++ b/packages/babel-generator/src/generators/statements.js
@@ -290,6 +290,7 @@ export function VariableDeclaration(node: Object, parent: Object) {
 
 export function VariableDeclarator(node: Object) {
   this.print(node.id, node);
+  if (node.definite) this.token("!"); // TS
   this.print(node.id.typeAnnotation, node);
   if (node.init) {
     this.space();
diff --git a/packages/babel-generator/src/generators/typescript.js b/packages/babel-generator/src/generators/typescript.js
index d628617171afb..1dca58c2adfd2 100644
--- a/packages/babel-generator/src/generators/typescript.js
+++ b/packages/babel-generator/src/generators/typescript.js
@@ -256,6 +256,28 @@ export function tsPrintUnionOrIntersectionType(node, sep) {
   });
 }
 
+export function TSConditionalType(node) {
+  this.print(node.checkType);
+  this.space();
+  this.word("extends");
+  this.space();
+  this.print(node.extendsType);
+  this.space();
+  this.token("?");
+  this.space();
+  this.print(node.trueType);
+  this.space();
+  this.token(":");
+  this.space();
+  this.print(node.falseType);
+}
+
+export function TSInferType(node) {
+  this.token("infer");
+  this.space();
+  this.print(node.typeParameter);
+}
+
 export function TSParenthesizedType(node) {
   this.token("(");
   this.print(node.typeAnnotation, node);
diff --git a/packages/babel-generator/src/node/whitespace.js b/packages/babel-generator/src/node/whitespace.js
index 63770fa36f001..ecc467b6cf859 100644
--- a/packages/babel-generator/src/node/whitespace.js
+++ b/packages/babel-generator/src/node/whitespace.js
@@ -1,4 +1,3 @@
-import map from "lodash/map";
 import * as t from "@babel/types";
 
 type WhitespaceObject = {
@@ -220,7 +219,7 @@ export const list = {
    */
 
   VariableDeclaration(node: Object): Array<Object> {
-    return map(node.declarations, "init");
+    return node.declarations.map(decl => decl.init);
   },
 
   /**
diff --git a/packages/babel-generator/src/source-map.js b/packages/babel-generator/src/source-map.js
index c2a41642826be..cbdbe8af89275 100644
--- a/packages/babel-generator/src/source-map.js
+++ b/packages/babel-generator/src/source-map.js
@@ -19,7 +19,6 @@ export default class SourceMap {
   get() {
     if (!this._cachedMap) {
       const map = (this._cachedMap = new sourceMap.SourceMapGenerator({
-        file: this._opts.sourceMapTarget,
         sourceRoot: this._opts.sourceRoot,
       }));
 
diff --git a/packages/babel-generator/test/fixtures/flow/variance/actual.js b/packages/babel-generator/test/fixtures/flow/variance/input.js
similarity index 100%
rename from packages/babel-generator/test/fixtures/flow/variance/actual.js
rename to packages/babel-generator/test/fixtures/flow/variance/input.js
diff --git a/packages/babel-generator/test/fixtures/flow/variance/expected.js b/packages/babel-generator/test/fixtures/flow/variance/output.js
similarity index 100%
rename from packages/babel-generator/test/fixtures/flow/variance/expected.js
rename to packages/babel-generator/test/fixtures/flow/variance/output.js
diff --git a/packages/babel-generator/test/fixtures/typescript/class-properties/input.js b/packages/babel-generator/test/fixtures/typescript/class-properties/input.js
index 8c0ad68965879..51413533ae042 100644
--- a/packages/babel-generator/test/fixtures/typescript/class-properties/input.js
+++ b/packages/babel-generator/test/fixtures/typescript/class-properties/input.js
@@ -3,4 +3,6 @@ class C {
     x?;
     x: number;
     x: number = 1;
+    x!;
+    x!: number;
 }
diff --git a/packages/babel-generator/test/fixtures/typescript/class-properties/output.js b/packages/babel-generator/test/fixtures/typescript/class-properties/output.js
index 6ae9081d49760..7318dc2f1d1de 100644
--- a/packages/babel-generator/test/fixtures/typescript/class-properties/output.js
+++ b/packages/babel-generator/test/fixtures/typescript/class-properties/output.js
@@ -3,4 +3,6 @@ class C {
   x?;
   x: number;
   x: number = 1;
+  x!;
+  x!: number;
 }
\ No newline at end of file
diff --git a/packages/babel-generator/test/fixtures/typescript/types-conditional-infer/input.js b/packages/babel-generator/test/fixtures/typescript/types-conditional-infer/input.js
new file mode 100644
index 0000000000000..fc9bc48546e6a
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/typescript/types-conditional-infer/input.js
@@ -0,0 +1 @@
+type Element<T> = T extends (infer U)[] ? U : T;
diff --git a/packages/babel-generator/test/fixtures/typescript/types-conditional-infer/output.js b/packages/babel-generator/test/fixtures/typescript/types-conditional-infer/output.js
new file mode 100644
index 0000000000000..aab1028e50368
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/typescript/types-conditional-infer/output.js
@@ -0,0 +1 @@
+type Element<T> = T extends (infer U)[] ? U : T;
\ No newline at end of file
diff --git a/packages/babel-generator/test/fixtures/typescript/types-conditional/input.js b/packages/babel-generator/test/fixtures/typescript/types-conditional/input.js
new file mode 100644
index 0000000000000..c776486898189
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/typescript/types-conditional/input.js
@@ -0,0 +1 @@
+let x: number extends string ? boolean : null;
diff --git a/packages/babel-generator/test/fixtures/typescript/types-conditional/output.js b/packages/babel-generator/test/fixtures/typescript/types-conditional/output.js
new file mode 100644
index 0000000000000..79c94be2c94e0
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/typescript/types-conditional/output.js
@@ -0,0 +1 @@
+let x: number extends string ? boolean : null;
\ No newline at end of file
diff --git a/packages/babel-generator/test/fixtures/typescript/variable-declarator-exclamation/input.js b/packages/babel-generator/test/fixtures/typescript/variable-declarator-exclamation/input.js
new file mode 100644
index 0000000000000..f27135a2b9f0d
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/typescript/variable-declarator-exclamation/input.js
@@ -0,0 +1 @@
+let x!: number;
diff --git a/packages/babel-generator/test/fixtures/typescript/variable-declarator-exclamation/output.js b/packages/babel-generator/test/fixtures/typescript/variable-declarator-exclamation/output.js
new file mode 100644
index 0000000000000..73cac9cc10de8
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/typescript/variable-declarator-exclamation/output.js
@@ -0,0 +1 @@
+let x!: number;
\ No newline at end of file
diff --git a/packages/babel-generator/test/index.js b/packages/babel-generator/test/index.js
index 99b5955222b71..ffb88113583cb 100644
--- a/packages/babel-generator/test/index.js
+++ b/packages/babel-generator/test/index.js
@@ -328,6 +328,23 @@ describe("programmatic generation", function() {
     );
   });
 
+  it("flow object exact", function() {
+    const objectStatement = t.objectTypeAnnotation(
+      [t.objectTypeProperty(t.identifier("bar"), t.stringTypeAnnotation())],
+      null,
+      null,
+      true,
+    );
+
+    const output = generate(objectStatement).code;
+    assert.equal(
+      output,
+      `{|
+  bar: string
+|}`,
+    );
+  });
+
   it("flow object indentation with empty leading ObjectTypeProperty", function() {
     const objectStatement = t.objectTypeAnnotation(
       [],
diff --git a/packages/babel-helper-annotate-as-pure/package.json b/packages/babel-helper-annotate-as-pure/package.json
index 6bb214050cad7..21f7ca5c74aad 100644
--- a/packages/babel-helper-annotate-as-pure/package.json
+++ b/packages/babel-helper-annotate-as-pure/package.json
@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-annotate-as-pure",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to annotate paths and nodes with #__PURE__ comment",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-annotate-as-pure",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-bindify-decorators/package.json b/packages/babel-helper-bindify-decorators/package.json
index d143a9276b73b..71cb9b3e41467 100644
--- a/packages/babel-helper-bindify-decorators/package.json
+++ b/packages/babel-helper-bindify-decorators/package.json
@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-bindify-decorators",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to bindify decorators",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-bindify-decorators",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/traverse": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/traverse": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-builder-binary-assignment-operator-visitor/package.json b/packages/babel-helper-builder-binary-assignment-operator-visitor/package.json
index f53038d2f2af7..873612218e36d 100644
--- a/packages/babel-helper-builder-binary-assignment-operator-visitor/package.json
+++ b/packages/babel-helper-builder-binary-assignment-operator-visitor/package.json
@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-builder-binary-assignment-operator-visitor",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to build binary assignment operator visitors",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-builder-binary-assignment-operator-visitor",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-explode-assignable-expression": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/helper-explode-assignable-expression": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-builder-react-jsx/package.json b/packages/babel-helper-builder-react-jsx/package.json
index 0e8e5ce139aa5..fb31510c6e35e 100644
--- a/packages/babel-helper-builder-react-jsx/package.json
+++ b/packages/babel-helper-builder-react-jsx/package.json
@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-builder-react-jsx",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to build react jsx",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-builder-react-jsx",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.39",
+    "@babel/types": "7.0.0-beta.42",
     "esutils": "^2.0.0"
   }
 }
diff --git a/packages/babel-helper-call-delegate/package.json b/packages/babel-helper-call-delegate/package.json
index 255e5d7ebffaf..8c4e50b866c04 100644
--- a/packages/babel-helper-call-delegate/package.json
+++ b/packages/babel-helper-call-delegate/package.json
@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-call-delegate",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to call delegate",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-call-delegate",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-hoist-variables": "7.0.0-beta.39",
-    "@babel/traverse": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/helper-hoist-variables": "7.0.0-beta.42",
+    "@babel/traverse": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-define-map/package.json b/packages/babel-helper-define-map/package.json
index d936e06961fe3..a7b0fbb7baa3c 100644
--- a/packages/babel-helper-define-map/package.json
+++ b/packages/babel-helper-define-map/package.json
@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-define-map",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to define a map",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-define-map",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-function-name": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39",
+    "@babel/helper-function-name": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42",
     "lodash": "^4.2.0"
   }
 }
diff --git a/packages/babel-helper-explode-assignable-expression/package.json b/packages/babel-helper-explode-assignable-expression/package.json
index 3f059837dca2a..167b452a66780 100644
--- a/packages/babel-helper-explode-assignable-expression/package.json
+++ b/packages/babel-helper-explode-assignable-expression/package.json
@@ -1,12 +1,12 @@
 {
   "name": "@babel/helper-explode-assignable-expression",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to explode an assignable expression",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-explode-assignable-expression",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/traverse": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/traverse": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-explode-class/package.json b/packages/babel-helper-explode-class/package.json
index 4bc47dcafaf03..69eefb4a722e8 100644
--- a/packages/babel-helper-explode-class/package.json
+++ b/packages/babel-helper-explode-class/package.json
@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-explode-class",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to explode class",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-explode-class",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-bindify-decorators": "7.0.0-beta.39",
-    "@babel/traverse": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/helper-bindify-decorators": "7.0.0-beta.42",
+    "@babel/traverse": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-fixtures/package.json b/packages/babel-helper-fixtures/package.json
index e56efdeac32b1..2247812667b0c 100644
--- a/packages/babel-helper-fixtures/package.json
+++ b/packages/babel-helper-fixtures/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-fixtures",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to support fixtures",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "license": "MIT",
diff --git a/packages/babel-helper-fixtures/src/index.js b/packages/babel-helper-fixtures/src/index.js
index da22a14ec695b..dcf01d8b6118b 100644
--- a/packages/babel-helper-fixtures/src/index.js
+++ b/packages/babel-helper-fixtures/src/index.js
@@ -124,6 +124,7 @@ export default function get(entryLoc): Array<Suite> {
         if (ext !== ".js" && ext !== ".mjs") return;
 
         execLoc = taskDir;
+        execLocAlias = suiteName + "/" + taskName;
       }
 
       if (resolve.relative(expectLoc + "on")) {
diff --git a/packages/babel-helper-function-name/package.json b/packages/babel-helper-function-name/package.json
index 4685e974dc834..98a6e34997e28 100644
--- a/packages/babel-helper-function-name/package.json
+++ b/packages/babel-helper-function-name/package.json
@@ -1,13 +1,13 @@
 {
   "name": "@babel/helper-function-name",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to change the property 'name' of every function",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-function-name",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-get-function-arity": "7.0.0-beta.39",
-    "@babel/template": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/helper-get-function-arity": "7.0.0-beta.42",
+    "@babel/template": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-get-function-arity/package.json b/packages/babel-helper-get-function-arity/package.json
index ed9d8db85a592..e33b125d89e33 100644
--- a/packages/babel-helper-get-function-arity/package.json
+++ b/packages/babel-helper-get-function-arity/package.json
@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-get-function-arity",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to get function arity",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-get-function-arity",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-hoist-variables/package.json b/packages/babel-helper-hoist-variables/package.json
index 9c6214b086015..8fdf06f5f4ae1 100644
--- a/packages/babel-helper-hoist-variables/package.json
+++ b/packages/babel-helper-hoist-variables/package.json
@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-hoist-variables",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to hoist variables",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-hoist-variables",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-module-imports/package.json b/packages/babel-helper-module-imports/package.json
index 53a311f8ace41..1c6613ea8e1b1 100644
--- a/packages/babel-helper-module-imports/package.json
+++ b/packages/babel-helper-module-imports/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-module-imports",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel helper functions for inserting module loads",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,10 +8,10 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-module-imports",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.39",
+    "@babel/types": "7.0.0-beta.42",
     "lodash": "^4.2.0"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-module-imports/src/import-injector.js b/packages/babel-helper-module-imports/src/import-injector.js
index 33b46a12cb932..bd1214c54b0f2 100644
--- a/packages/babel-helper-module-imports/src/import-injector.js
+++ b/packages/babel-helper-module-imports/src/import-injector.js
@@ -209,7 +209,7 @@ export default class ImportInjector {
     // to a variable.
     let name = nameHint || importName;
 
-    const isMod = isModule(this._programPath, true);
+    const isMod = isModule(this._programPath);
     const isModuleForNode = isMod && importingInterop === "node";
     const isModuleForBabel = isMod && importingInterop === "babel";
 
diff --git a/packages/babel-helper-module-imports/src/is-module.js b/packages/babel-helper-module-imports/src/is-module.js
index 8e20fb2472d44..39cff11148d88 100644
--- a/packages/babel-helper-module-imports/src/is-module.js
+++ b/packages/babel-helper-module-imports/src/is-module.js
@@ -1,11 +1,7 @@
 /**
- * A small utility to check if a file qualifies as a module, based on a few
- * possible conditions.
+ * A small utility to check if a file qualifies as a module.
  */
-export default function isModule(
-  path: NodePath,
-  requireUnambiguous: boolean = false,
-) {
+export default function isModule(path: NodePath) {
   const { sourceType } = path.node;
   if (sourceType !== "module" && sourceType !== "script") {
     throw path.buildCodeFrameError(
@@ -13,19 +9,5 @@ export default function isModule(
     );
   }
 
-  const filename = path.hub.file.opts.filename;
-  if (/\.mjs$/.test(filename)) {
-    requireUnambiguous = false;
-  }
-
-  return (
-    path.node.sourceType === "module" &&
-    (!requireUnambiguous || isUnambiguousModule(path))
-  );
-}
-
-// This approach is not ideal. It is here to preserve compatibility for now,
-// but really this should just return true or be deleted.
-function isUnambiguousModule(path) {
-  return path.get("body").some(p => p.isModuleDeclaration());
+  return path.node.sourceType === "module";
 }
diff --git a/packages/babel-helper-module-transforms/package.json b/packages/babel-helper-module-transforms/package.json
index 5386d614c12ad..0c5f8fcc9edca 100644
--- a/packages/babel-helper-module-transforms/package.json
+++ b/packages/babel-helper-module-transforms/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-module-transforms",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel helper functions for implementing ES6 module transformations",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,10 +8,11 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-module-transforms",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-module-imports": "7.0.0-beta.39",
-    "@babel/helper-simple-access": "7.0.0-beta.39",
-    "@babel/template": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39",
+    "@babel/helper-module-imports": "7.0.0-beta.42",
+    "@babel/helper-simple-access": "7.0.0-beta.42",
+    "@babel/helper-split-export-declaration": "7.0.0-beta.42",
+    "@babel/template": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42",
     "lodash": "^4.2.0"
   }
 }
diff --git a/packages/babel-helper-module-transforms/src/index.js b/packages/babel-helper-module-transforms/src/index.js
index ce07b94e4abea..859b63989fe3b 100644
--- a/packages/babel-helper-module-transforms/src/index.js
+++ b/packages/babel-helper-module-transforms/src/index.js
@@ -22,7 +22,16 @@ export { hasExports, isSideEffectImport, isModule };
  */
 export function rewriteModuleStatementsAndPrepareHeader(
   path: NodePath,
-  { exportName, strict, allowTopLevelThis, strictMode, loose, noInterop, lazy },
+  {
+    exportName,
+    strict,
+    allowTopLevelThis,
+    strictMode,
+    loose,
+    noInterop,
+    lazy,
+    esNamespaceOnly,
+  },
 ) {
   assert(isModule(path), "Cannot process module statements in a script");
   path.node.sourceType = "script";
@@ -31,6 +40,7 @@ export function rewriteModuleStatementsAndPrepareHeader(
     noInterop,
     loose,
     lazy,
+    esNamespaceOnly,
   });
 
   if (!allowTopLevelThis) {
diff --git a/packages/babel-helper-module-transforms/src/normalize-and-load-metadata.js b/packages/babel-helper-module-transforms/src/normalize-and-load-metadata.js
index c937ab5e61f91..8ffda284447e3 100644
--- a/packages/babel-helper-module-transforms/src/normalize-and-load-metadata.js
+++ b/packages/babel-helper-module-transforms/src/normalize-and-load-metadata.js
@@ -1,6 +1,6 @@
 import { basename, extname } from "path";
 
-import * as t from "@babel/types";
+import splitExportDeclaration from "@babel/helper-split-export-declaration";
 
 export type ModuleMetadata = {
   exportName: string,
@@ -86,7 +86,12 @@ export function isSideEffectImport(source: SourceModuleMetadata) {
 export default function normalizeModuleAndLoadMetadata(
   programPath: NodePath,
   exportName?: string,
-  { noInterop = false, loose = false, lazy = false } = {},
+  {
+    noInterop = false,
+    loose = false,
+    lazy = false,
+    esNamespaceOnly = false,
+  } = {},
 ): ModuleMetadata {
   if (!exportName) {
     exportName = programPath.scope.generateUidIdentifier("exports").name;
@@ -107,6 +112,16 @@ export default function normalizeModuleAndLoadMetadata(
     }
 
     if (noInterop) metadata.interop = "none";
+    else if (esNamespaceOnly) {
+      // Both the default and namespace interops pass through __esModule
+      // objects, but the namespace interop is used to enable Babel's
+      // destructuring-like interop behavior for normal CommonJS.
+      // Since some tooling has started to remove that behavior, we expose
+      // it as the `esNamespace` option.
+      if (metadata.interop === "namespace") {
+        metadata.interop = "default";
+      }
+    }
   }
 
   return {
@@ -399,35 +414,7 @@ function nameAnonymousExports(programPath: NodePath) {
   // Name anonymous exported locals.
   programPath.get("body").forEach(child => {
     if (!child.isExportDefaultDeclaration()) return;
-
-    // export default foo;
-    const declaration = child.get("declaration");
-    if (declaration.isFunctionDeclaration()) {
-      if (!declaration.node.id) {
-        declaration.node.id = declaration.scope.generateUidIdentifier(
-          "default",
-        );
-      }
-    } else if (declaration.isClassDeclaration()) {
-      if (!declaration.node.id) {
-        declaration.node.id = declaration.scope.generateUidIdentifier(
-          "default",
-        );
-      }
-    } else {
-      const id = declaration.scope.generateUidIdentifier("default");
-      const namedDecl = t.exportNamedDeclaration(null, [
-        t.exportSpecifier(t.identifier(id.name), t.identifier("default")),
-      ]);
-      namedDecl._blockHoist = child.node._blockHoist;
-
-      const varDecl = t.variableDeclaration("var", [
-        t.variableDeclarator(id, declaration.node),
-      ]);
-      varDecl._blockHoist = child.node._blockHoist;
-
-      child.replaceWithMultiple([namedDecl, varDecl]);
-    }
+    splitExportDeclaration(child);
   });
 }
 
diff --git a/packages/babel-helper-module-transforms/src/rewrite-live-references.js b/packages/babel-helper-module-transforms/src/rewrite-live-references.js
index 484633d75aee7..e73bb05dad1c6 100644
--- a/packages/babel-helper-module-transforms/src/rewrite-live-references.js
+++ b/packages/babel-helper-module-transforms/src/rewrite-live-references.js
@@ -112,6 +112,7 @@ const rewriteBindingInitVisitor = {
 
     Object.keys(path.getOuterBindingIdentifiers()).forEach(localName => {
       const exportNames = exported.get(localName) || [];
+
       if (exportNames.length > 0) {
         const statement = t.expressionStatement(
           buildBindingExportAssignmentExpression(
@@ -180,7 +181,13 @@ const rewriteReferencesVisitor = {
     if (importData) {
       const ref = buildImportReference(importData, path.node);
 
-      if (path.parentPath.isCallExpression({ callee: path.node })) {
+      // Preserve the binding location so that sourcemaps are nicer.
+      ref.loc = path.node.loc;
+
+      if (
+        path.parentPath.isCallExpression({ callee: path.node }) &&
+        t.isMemberExpression(ref)
+      ) {
         path.replaceWith(t.sequenceExpression([t.numericLiteral(0), ref]));
       } else if (path.isJSXIdentifier() && t.isMemberExpression(ref)) {
         const { object, property } = ref;
@@ -195,6 +202,10 @@ const rewriteReferencesVisitor = {
       }
 
       requeueInParent(path);
+
+      // The path could have been replaced with an identifier that would
+      // otherwise be re-visited, so we skip processing its children.
+      path.skip();
     }
   },
 
diff --git a/packages/babel-helper-optimise-call-expression/package.json b/packages/babel-helper-optimise-call-expression/package.json
index 04a326324cab7..ba193c58a4d63 100644
--- a/packages/babel-helper-optimise-call-expression/package.json
+++ b/packages/babel-helper-optimise-call-expression/package.json
@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-optimise-call-expression",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to optimise call expression",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-optimise-call-expression",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-plugin-test-runner/package.json b/packages/babel-helper-plugin-test-runner/package.json
index 44a03fd3ccfa0..f4149ee340cb5 100644
--- a/packages/babel-helper-plugin-test-runner/package.json
+++ b/packages/babel-helper-plugin-test-runner/package.json
@@ -1,11 +1,11 @@
 {
   "name": "@babel/helper-plugin-test-runner",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to support test runner",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-plugin-test-runner",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.39"
+    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-plugin-utils/package.json b/packages/babel-helper-plugin-utils/package.json
new file mode 100644
index 0000000000000..f23d4bccf37fe
--- /dev/null
+++ b/packages/babel-helper-plugin-utils/package.json
@@ -0,0 +1,10 @@
+{
+  "name": "@babel/helper-plugin-utils",
+  "version": "7.0.0-beta.42",
+  "description": "General utilities for plugins to use",
+  "author": "Logan Smyth <loganfsmyth@gmail.com>",
+  "homepage": "https://babeljs.io/",
+  "license": "MIT",
+  "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-plugin-utils",
+  "main": "lib/index.js"
+}
diff --git a/packages/babel-helper-plugin-utils/src/README.md b/packages/babel-helper-plugin-utils/src/README.md
new file mode 100644
index 0000000000000..4079c2d4e6cf0
--- /dev/null
+++ b/packages/babel-helper-plugin-utils/src/README.md
@@ -0,0 +1,41 @@
+# @babel/helper-plugin-utils
+
+The intention of this module is to provide a place for us to expose a
+standardized API layer over top of what Babel's core API provides on its own.
+
+This is not aiming to implement APIs that are missing on a given Babel version,
+but it is means to provide clear error messages if a plugin is run on a version
+of Babel that doesn't have the APIs that the plugin is trying to use.
+
+Every one of Babel's core plugins and presets will use this module, and ideally
+because of that its size should be kept to a miminum because this may or may
+not be deduplicated when installed.
+
+
+## Usage
+
+```js
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare((api, options, dirname) => {
+  return {};
+});
+```
+
+
+## What this does
+
+Currently, this plugin provides a few services to ensure that plugins function
+well-enough to throw useful errors.
+
+### `options` is always passed
+
+Babel 6 does not pass a second parameter. This frequently means that plugins
+written for Babel 7 that use `options` will attempt to destructure options
+out of an `undefined` value. By supplying the default, we avoid that risk.
+
+### `api.assertVersion` always exists
+
+Babel 6 and early betas of Babel 7 do not have `assertVersion`, so this
+wrapper ensures that it exists and throws a useful error message when not
+supplied by Babel itself.
diff --git a/packages/babel-helper-plugin-utils/src/index.js b/packages/babel-helper-plugin-utils/src/index.js
new file mode 100644
index 0000000000000..e8534608d821b
--- /dev/null
+++ b/packages/babel-helper-plugin-utils/src/index.js
@@ -0,0 +1,92 @@
+export function declare(builder) {
+  return (api, options, dirname) => {
+    if (!api.assertVersion) {
+      // Inject a custom version of 'assertVersion' for Babel 6 and early
+      // versions of Babel 7's beta that didn't have it.
+      api = Object.assign(copyApiObject(api), {
+        assertVersion(range) {
+          throwVersionError(range, api.version);
+        },
+      });
+    }
+
+    return builder(api, options || {}, dirname);
+  };
+}
+
+function copyApiObject(api) {
+  // Babel >= 7 <= beta.41 passed the API as a new object that had
+  // babel/core as the prototype. While slightly faster, it also
+  // means that the Object.assign copy below fails. Rather than
+  // keep complexity, the Babel 6 behavior has been reverted and this
+  // normalizes all that for Babel 7.
+  let proto = null;
+  if (typeof api.version === "string" && /^7\./.test(api.version)) {
+    proto = Object.getPrototypeOf(api);
+    if (
+      proto &&
+      (!has(proto, "version") ||
+        !has(proto, "transform") ||
+        !has(proto, "template") ||
+        !has(proto, "types"))
+    ) {
+      proto = null;
+    }
+  }
+
+  return Object.assign({}, proto, api);
+}
+
+function has(obj, key) {
+  return Object.prototype.hasOwnProperty.call(obj, key);
+}
+
+function throwVersionError(range, version) {
+  if (typeof range === "number") {
+    if (!Number.isInteger(range)) {
+      throw new Error("Expected string or integer value.");
+    }
+    range = `^${range}.0.0-0`;
+  }
+  if (typeof range !== "string") {
+    throw new Error("Expected string or integer value.");
+  }
+
+  const limit = Error.stackTraceLimit;
+
+  if (typeof limit === "number" && limit < 25) {
+    // Bump up the limit if needed so that users are more likely
+    // to be able to see what is calling Babel.
+    Error.stackTraceLimit = 25;
+  }
+
+  let err;
+  if (version.slice(0, 2) === "7.") {
+    err = new Error(
+      `Requires Babel "^7.0.0-beta.41", but was loaded with "${version}". ` +
+        `You'll need to update your @babel/core version.`,
+    );
+  } else {
+    err = new Error(
+      `Requires Babel "${range}", but was loaded with "${version}". ` +
+        `If you are sure you have a compatible version of @babel/core, ` +
+        `it is likely that something in your build process is loading the ` +
+        `wrong version. Inspect the stack trace of this error to look for ` +
+        `the first entry that doesn't mention "@babel/core" or "babel-core" ` +
+        `to see what is calling Babel.`,
+    );
+  }
+
+  if (typeof limit === "number") {
+    Error.stackTraceLimit = limit;
+  }
+
+  throw Object.assign(
+    err,
+    ({
+      code: "BABEL_VERSION_UNSUPPORTED",
+      version,
+      range,
+    }: any),
+  );
+}
diff --git a/packages/babel-helper-regex/package.json b/packages/babel-helper-regex/package.json
index 182b097f64a69..0dbde8c7665ce 100644
--- a/packages/babel-helper-regex/package.json
+++ b/packages/babel-helper-regex/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-regex",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to check for literal RegEx",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-regex",
   "license": "MIT",
diff --git a/packages/babel-helper-remap-async-to-generator/package.json b/packages/babel-helper-remap-async-to-generator/package.json
index 36279493b6133..1920da530ccf9 100644
--- a/packages/babel-helper-remap-async-to-generator/package.json
+++ b/packages/babel-helper-remap-async-to-generator/package.json
@@ -1,15 +1,15 @@
 {
   "name": "@babel/helper-remap-async-to-generator",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to remap async functions to generators",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-remap-async-to-generator",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-annotate-as-pure": "7.0.0-beta.39",
-    "@babel/helper-wrap-function": "7.0.0-beta.39",
-    "@babel/template": "7.0.0-beta.39",
-    "@babel/traverse": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/helper-annotate-as-pure": "7.0.0-beta.42",
+    "@babel/helper-wrap-function": "7.0.0-beta.42",
+    "@babel/template": "7.0.0-beta.42",
+    "@babel/traverse": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-remap-async-to-generator/src/index.js b/packages/babel-helper-remap-async-to-generator/src/index.js
index 4bebf1eb3ae07..635b0876c22fd 100644
--- a/packages/babel-helper-remap-async-to-generator/src/index.js
+++ b/packages/babel-helper-remap-async-to-generator/src/index.js
@@ -4,7 +4,6 @@ import type { NodePath } from "@babel/traverse";
 import wrapFunction from "@babel/helper-wrap-function";
 import annotateAsPure from "@babel/helper-annotate-as-pure";
 import * as t from "@babel/types";
-import rewriteForAwait from "./for-await";
 
 const awaitVisitor = {
   Function(path) {
@@ -27,44 +26,13 @@ const awaitVisitor = {
       ),
     );
   },
-
-  ForOfStatement(path, { file, wrapAwait }) {
-    const { node } = path;
-    if (!node.await) return;
-
-    const build = rewriteForAwait(path, {
-      getAsyncIterator: file.addHelper("asyncIterator"),
-      wrapAwait,
-    });
-
-    const { declar, loop } = build;
-    const block = loop.body;
-
-    // ensure that it's a block so we can take all its statements
-    path.ensureBlock();
-
-    // add the value declaration to the new loop body
-    if (declar) {
-      block.body.push(declar);
-    }
-
-    // push the rest of the original loop body onto our new body
-    block.body = block.body.concat(node.body.body);
-
-    t.inherits(loop, node);
-    t.inherits(loop.body, node.body);
-
-    if (build.replaceParent) {
-      path.parentPath.replaceWithMultiple(build.node);
-    } else {
-      path.replaceWithMultiple(build.node);
-    }
-  },
 };
 
-export default function(path: NodePath, file: Object, helpers: Object) {
+export default function(
+  path: NodePath,
+  helpers: { wrapAsync: Object, wrapAwait: Object },
+) {
   path.traverse(awaitVisitor, {
-    file,
     wrapAwait: helpers.wrapAwait,
   });
 
diff --git a/packages/babel-helper-replace-supers/package.json b/packages/babel-helper-replace-supers/package.json
index 24ff964752bbd..e9d02fe5deb08 100644
--- a/packages/babel-helper-replace-supers/package.json
+++ b/packages/babel-helper-replace-supers/package.json
@@ -1,14 +1,14 @@
 {
   "name": "@babel/helper-replace-supers",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper function to replace supers",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-replace-supers",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-optimise-call-expression": "7.0.0-beta.39",
-    "@babel/template": "7.0.0-beta.39",
-    "@babel/traverse": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/helper-optimise-call-expression": "7.0.0-beta.42",
+    "@babel/template": "7.0.0-beta.42",
+    "@babel/traverse": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-simple-access/package.json b/packages/babel-helper-simple-access/package.json
index 146ba722fa1b8..033603a4f7a73 100644
--- a/packages/babel-helper-simple-access/package.json
+++ b/packages/babel-helper-simple-access/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-simple-access",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel helper for ensuring that access to a given value is performed through simple accesses",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,8 +8,8 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-simple-access",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/template": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39",
+    "@babel/template": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42",
     "lodash": "^4.2.0"
   }
 }
diff --git a/packages/babel-helper-simple-access/src/index.js b/packages/babel-helper-simple-access/src/index.js
index 4d3ec6a9223f4..b26404223cc35 100644
--- a/packages/babel-helper-simple-access/src/index.js
+++ b/packages/babel-helper-simple-access/src/index.js
@@ -29,8 +29,9 @@ const simpleAssignmentVisitor = {
         (path.parentPath.isExpressionStatement() && !path.isCompletionRecord())
       ) {
         // ++i => (i += 1);
+        const operator = path.node.operator == "++" ? "+=" : "-=";
         path.replaceWith(
-          t.assignmentExpression("+=", arg.node, t.numericLiteral(1)),
+          t.assignmentExpression(operator, arg.node, t.numericLiteral(1)),
         );
       } else {
         const varName = path.scope.generateDeclaredUidIdentifier("old").name;
diff --git a/packages/babel-helper-split-export-declaration/.npmignore b/packages/babel-helper-split-export-declaration/.npmignore
new file mode 100644
index 0000000000000..f9806945836eb
--- /dev/null
+++ b/packages/babel-helper-split-export-declaration/.npmignore
@@ -0,0 +1,3 @@
+src
+test
+*.log
diff --git a/packages/babel-helper-split-export-declaration/README.md b/packages/babel-helper-split-export-declaration/README.md
new file mode 100644
index 0000000000000..195f151e9229b
--- /dev/null
+++ b/packages/babel-helper-split-export-declaration/README.md
@@ -0,0 +1,23 @@
+# @babel/helper-split-export-declaration
+
+## API
+
+```js
+declare export default splitExportDeclaration(path: NodePath);
+```
+
+## Usage
+
+```js
+import traverse from "@babel/traverse";
+import splitExportDeclaration from "@babel/helper-split-export-declaration";
+
+// ...
+
+traverse(file, {
+  ExportDefaultDeclaration(path) {
+    if (!path.get("declaration").isClassDeclaration()) return;
+    splitExportDeclaration(path);
+  },
+});
+```
diff --git a/packages/babel-helper-split-export-declaration/package.json b/packages/babel-helper-split-export-declaration/package.json
new file mode 100644
index 0000000000000..33211a5dd9464
--- /dev/null
+++ b/packages/babel-helper-split-export-declaration/package.json
@@ -0,0 +1,11 @@
+{
+  "name": "@babel/helper-split-export-declaration",
+  "version": "7.0.0-beta.42",
+  "description": "",
+  "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-split-export-declaration",
+  "license": "MIT",
+  "main": "lib/index.js",
+  "dependencies": {
+    "@babel/types": "7.0.0-beta.42"
+  }
+}
diff --git a/packages/babel-helper-split-export-declaration/src/index.js b/packages/babel-helper-split-export-declaration/src/index.js
new file mode 100644
index 0000000000000..ffbf52243a057
--- /dev/null
+++ b/packages/babel-helper-split-export-declaration/src/index.js
@@ -0,0 +1,76 @@
+import * as t from "@babel/types";
+
+export default function splitExportDeclaration(exportDeclaration) {
+  if (!exportDeclaration.isExportDeclaration()) {
+    throw new Error("Only export declarations can be splitted.");
+  }
+
+  // build specifiers that point back to this export declaration
+  const isDefault = exportDeclaration.isExportDefaultDeclaration();
+  const declaration = exportDeclaration.get("declaration");
+  const isClassDeclaration = declaration.isClassDeclaration();
+
+  if (isDefault) {
+    const standaloneDeclaration =
+      declaration.isFunctionDeclaration() || isClassDeclaration;
+
+    const scope = declaration.isScope()
+      ? declaration.scope.parent
+      : declaration.scope;
+
+    let id = declaration.node.id;
+    let needBindingRegistration = false;
+
+    if (!id) {
+      needBindingRegistration = true;
+
+      id = scope.generateUidIdentifier("default");
+
+      if (
+        standaloneDeclaration ||
+        declaration.isFunctionExpression() ||
+        declaration.isClassExpression()
+      ) {
+        declaration.node.id = t.cloneNode(id);
+      }
+    }
+
+    const updatedDeclaration = standaloneDeclaration
+      ? declaration
+      : t.variableDeclaration("var", [
+          t.variableDeclarator(t.cloneNode(id), declaration.node),
+        ]);
+
+    const updatedExportDeclaration = t.exportNamedDeclaration(null, [
+      t.exportSpecifier(t.cloneNode(id), t.identifier("default")),
+    ]);
+
+    exportDeclaration.insertAfter(updatedExportDeclaration);
+    exportDeclaration.replaceWith(updatedDeclaration);
+
+    if (needBindingRegistration) {
+      scope.registerBinding(
+        isClassDeclaration ? "let" : "var",
+        exportDeclaration,
+      );
+    }
+
+    return exportDeclaration;
+  }
+
+  if (exportDeclaration.get("specifiers").length > 0) {
+    throw new Error("It doesn't make sense to split exported specifiers.");
+  }
+
+  const bindingIdentifiers = declaration.getOuterBindingIdentifiers();
+
+  const specifiers = Object.keys(bindingIdentifiers).map(name => {
+    return t.exportSpecifier(t.identifier(name), t.identifier(name));
+  });
+
+  const aliasDeclar = t.exportNamedDeclaration(null, specifiers);
+
+  exportDeclaration.insertAfter(aliasDeclar);
+  exportDeclaration.replaceWith(declaration.node);
+  return exportDeclaration;
+}
diff --git a/packages/babel-helper-transform-fixture-test-runner/package.json b/packages/babel-helper-transform-fixture-test-runner/package.json
index 122039dc6b57a..e5667e1383115 100644
--- a/packages/babel-helper-transform-fixture-test-runner/package.json
+++ b/packages/babel-helper-transform-fixture-test-runner/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/helper-transform-fixture-test-runner",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Transform test runner for @babel/helper-fixtures module",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,11 +8,13 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-transform-fixture-test-runner",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/code-frame": "7.0.0-beta.39",
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-fixtures": "7.0.0-beta.39",
-    "@babel/polyfill": "7.0.0-beta.39",
+    "@babel/code-frame": "7.0.0-beta.42",
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-fixtures": "7.0.0-beta.42",
+    "@babel/polyfill": "7.0.0-beta.42",
     "chai": "^4.1.0",
+    "jest": "^22.4.2",
+    "jest-diff": "^22.4.0",
     "lodash": "^4.2.0",
     "resolve": "^1.3.2",
     "source-map": "^0.5.0"
diff --git a/packages/babel-helper-transform-fixture-test-runner/src/index.js b/packages/babel-helper-transform-fixture-test-runner/src/index.js
index 40652a0f8c3d5..71a3f9e5e531c 100644
--- a/packages/babel-helper-transform-fixture-test-runner/src/index.js
+++ b/packages/babel-helper-transform-fixture-test-runner/src/index.js
@@ -1,4 +1,4 @@
-/* eslint-env mocha */
+/* eslint-env jest */
 import * as babel from "@babel/core";
 import { buildExternalHelpers } from "@babel/core";
 import getFixtures from "@babel/helper-fixtures";
@@ -11,11 +11,12 @@ import extend from "lodash/extend";
 import merge from "lodash/merge";
 import resolve from "resolve";
 import assert from "assert";
-import chai from "chai";
 import fs from "fs";
 import path from "path";
 import vm from "vm";
 
+import diff from "jest-diff";
+
 const moduleCache = {};
 const testContext = vm.createContext({
   ...helpers,
@@ -23,6 +24,7 @@ const testContext = vm.createContext({
   transform: babel.transform,
   setTimeout: setTimeout,
   setImmediate: setImmediate,
+  expect,
 });
 testContext.global = testContext;
 
@@ -321,7 +323,7 @@ function checkDuplicatedNodes(ast) {
 
 function run(task) {
   const actual = task.actual;
-  const expect = task.expect;
+  const expected = task.expect;
   const exec = task.exec;
   const opts = task.options;
   const optionsDir = task.optionsDir;
@@ -330,6 +332,10 @@ function run(task) {
     const newOpts = merge(
       {
         filename: self.loc,
+        filenameRelative: self.filename,
+        sourceFileName: self.filename,
+        sourceType: "script",
+        babelrc: false,
       },
       opts,
     );
@@ -375,29 +381,47 @@ function run(task) {
   }
 
   let actualCode = actual.code;
-  const expectCode = expect.code;
+  const expectCode = expected.code;
   if (!execCode || actualCode) {
     result = babel.transform(actualCode, getOpts(actual));
     checkDuplicatedNodes(result.ast);
     if (
-      !expect.code &&
+      !expected.code &&
       result.code &&
       !opts.throws &&
-      fs.statSync(path.dirname(expect.loc)).isDirectory() &&
+      fs.statSync(path.dirname(expected.loc)).isDirectory() &&
       !process.env.CI
     ) {
-      console.log(`New test file created: ${expect.loc}`);
-      fs.writeFileSync(expect.loc, `${result.code}\n`);
+      const expectedFile = expected.loc.replace(
+        /\.m?js$/,
+        result.sourceType === "module" ? ".mjs" : ".js",
+      );
+
+      console.log(`New test file created: ${expectedFile}`);
+      fs.writeFileSync(expectedFile, `${result.code}\n`);
+
+      if (expected.loc !== expectedFile) {
+        try {
+          fs.unlinkSync(expected.loc);
+        } catch (e) {}
+      }
     } else {
       actualCode = result.code.trim();
-      chai
-        .expect(actualCode)
-        .to.be.equal(expectCode, actual.loc + " !== " + expect.loc);
+      expect(actualCode).toEqualFile({
+        filename: expected.loc,
+        code: expectCode,
+      });
+
+      if (actualCode) {
+        expect(expected.loc).toMatch(
+          result.sourceType === "module" ? /\.mjs$/ : /\.js$/,
+        );
+      }
     }
   }
 
   if (task.sourceMap) {
-    chai.expect(result.map).to.deep.equal(task.sourceMap);
+    expect(result.map).toEqual(task.sourceMap);
   }
 
   if (task.sourceMappings) {
@@ -406,10 +430,8 @@ function run(task) {
     task.sourceMappings.forEach(function(mapping) {
       const actual = mapping.original;
 
-      const expect = consumer.originalPositionFor(mapping.generated);
-      chai
-        .expect({ line: expect.line, column: expect.column })
-        .to.deep.equal(actual);
+      const expected = consumer.originalPositionFor(mapping.generated);
+      expect({ line: expected.line, column: expected.column }).toEqual(actual);
     });
   }
 
@@ -418,6 +440,28 @@ function run(task) {
   }
 }
 
+const toEqualFile = () => ({
+  compare: (actual, { filename, code }) => {
+    const pass = actual === code;
+    return {
+      pass,
+      message: () => {
+        const diffString = diff(code, actual, {
+          expand: false,
+        });
+        return (
+          `Expected ${filename} to match transform output.\n` +
+          `To autogenerate a passing version of this file, delete the file and re-run the tests.\n\n` +
+          `Diff:\n\n${diffString}`
+        );
+      },
+    };
+  },
+  negativeCompare: () => {
+    throw new Error("Negation unsupported");
+  },
+});
+
 export default function(
   fixturesLoc: string,
   name: string,
@@ -431,6 +475,10 @@ export default function(
     if (includes(suiteOpts.ignoreSuites, testSuite.title)) continue;
 
     describe(name + "/" + testSuite.title, function() {
+      jest.addMatchers({
+        toEqualFile,
+      });
+
       for (const task of testSuite.tests) {
         if (
           includes(suiteOpts.ignoreTasks, task.title) ||
@@ -448,10 +496,6 @@ export default function(
               }
 
               defaults(task.options, {
-                filenameRelative: task.expect.filename,
-                sourceFileName: task.actual.filename,
-                sourceMapTarget: task.expect.filename,
-                babelrc: false,
                 sourceMap: !!(task.sourceMappings || task.sourceMap),
               });
 
diff --git a/packages/babel-helper-wrap-function/package.json b/packages/babel-helper-wrap-function/package.json
index 5235d225611f7..e0ba12ea172f9 100644
--- a/packages/babel-helper-wrap-function/package.json
+++ b/packages/babel-helper-wrap-function/package.json
@@ -1,14 +1,14 @@
 {
   "name": "@babel/helper-wrap-function",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Helper to wrap functions inside a function call.",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-wrap-function",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-function-name": "7.0.0-beta.39",
-    "@babel/template": "7.0.0-beta.39",
-    "@babel/traverse": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/helper-function-name": "7.0.0-beta.42",
+    "@babel/template": "7.0.0-beta.42",
+    "@babel/traverse": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helpers/package.json b/packages/babel-helpers/package.json
index 6aa3f80ac7dec..8c6e85c94f843 100644
--- a/packages/babel-helpers/package.json
+++ b/packages/babel-helpers/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/helpers",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Collection of helper functions used by Babel transforms.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,11 +8,11 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-helpers",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/template": "7.0.0-beta.39",
-    "@babel/traverse": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/template": "7.0.0-beta.42",
+    "@babel/traverse": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helpers/src/helpers.js b/packages/babel-helpers/src/helpers.js
index 3f0689e8ba1d1..b8dfe9119a571 100644
--- a/packages/babel-helpers/src/helpers.js
+++ b/packages/babel-helpers/src/helpers.js
@@ -5,11 +5,7 @@ import template from "@babel/template";
 const helpers = {};
 export default helpers;
 
-// Helpers never include placeholders, so we disable placeholder pattern
-// matching to allow us to use pattern-like variable names.
-const defineHelper = template.program({ placeholderPattern: false });
-
-helpers.typeof = defineHelper(`
+helpers.typeof = () => template.program.ast`
   export default function _typeof(obj) {
     if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
       _typeof = function (obj) { return typeof obj; };
@@ -23,9 +19,9 @@ helpers.typeof = defineHelper(`
 
     return _typeof(obj);
   }
-`);
+`;
 
-helpers.jsx = defineHelper(`
+helpers.jsx = () => template.program.ast`
   var REACT_ELEMENT_TYPE;
 
   export default function _createRawReactElement(type, props, key, children) {
@@ -72,9 +68,9 @@ helpers.jsx = defineHelper(`
       _owner: null,
     };
   }
-`);
+`;
 
-helpers.asyncIterator = defineHelper(`
+helpers.asyncIterator = () => template.program.ast`
   export default function _asyncIterator(iterable) {
     if (typeof Symbol === "function") {
       if (Symbol.asyncIterator) {
@@ -87,15 +83,15 @@ helpers.asyncIterator = defineHelper(`
     }
     throw new TypeError("Object is not async iterable");
   }
-`);
+`;
 
-helpers.AwaitValue = defineHelper(`
+helpers.AwaitValue = () => template.program.ast`
   export default function _AwaitValue(value) {
     this.wrapped = value;
   }
-`);
+`;
 
-helpers.AsyncGenerator = defineHelper(`
+helpers.AsyncGenerator = () => template.program.ast`
   import AwaitValue from "AwaitValue";
 
   export default function AsyncGenerator(gen) {
@@ -177,9 +173,9 @@ helpers.AsyncGenerator = defineHelper(`
   AsyncGenerator.prototype.next = function (arg) { return this._invoke("next", arg); };
   AsyncGenerator.prototype.throw = function (arg) { return this._invoke("throw", arg); };
   AsyncGenerator.prototype.return = function (arg) { return this._invoke("return", arg); };
-`);
+`;
 
-helpers.wrapAsyncGenerator = defineHelper(`
+helpers.wrapAsyncGenerator = () => template.program.ast`
   import AsyncGenerator from "AsyncGenerator";
 
   export default function _wrapAsyncGenerator(fn) {
@@ -187,17 +183,17 @@ helpers.wrapAsyncGenerator = defineHelper(`
       return new AsyncGenerator(fn.apply(this, arguments));
     };
   }
-`);
+`;
 
-helpers.awaitAsyncGenerator = defineHelper(`
+helpers.awaitAsyncGenerator = () => template.program.ast`
   import AwaitValue from "AwaitValue";
 
   export default function _awaitAsyncGenerator(value) {
     return new AwaitValue(value);
   }
-`);
+`;
 
-helpers.asyncGeneratorDelegate = defineHelper(`
+helpers.asyncGeneratorDelegate = () => template.program.ast`
   export default function _asyncGeneratorDelegate(inner, awaitWrap) {
     var iter = {}, waiting = false;
 
@@ -237,9 +233,9 @@ helpers.asyncGeneratorDelegate = defineHelper(`
 
     return iter;
   }
-`);
+`;
 
-helpers.asyncToGenerator = defineHelper(`
+helpers.asyncToGenerator = () => template.program.ast`
   export default function _asyncToGenerator(fn) {
     return function () {
       var self = this, args = arguments;
@@ -267,17 +263,17 @@ helpers.asyncToGenerator = defineHelper(`
       });
     };
   }
-`);
+`;
 
-helpers.classCallCheck = defineHelper(`
+helpers.classCallCheck = () => template.program.ast`
   export default function _classCallCheck(instance, Constructor) {
     if (!(instance instanceof Constructor)) {
       throw new TypeError("Cannot call a class as a function");
     }
   }
-`);
+`;
 
-helpers.createClass = defineHelper(`
+helpers.createClass = () => template.program.ast`
   function _defineProperties(target, props) {
     for (var i = 0; i < props.length; i ++) {
       var descriptor = props[i];
@@ -293,9 +289,9 @@ helpers.createClass = defineHelper(`
     if (staticProps) _defineProperties(Constructor, staticProps);
     return Constructor;
   }
-`);
+`;
 
-helpers.defineEnumerableProperties = defineHelper(`
+helpers.defineEnumerableProperties = () => template.program.ast`
   export default function _defineEnumerableProperties(obj, descs) {
     for (var key in descs) {
       var desc = descs[key];
@@ -319,9 +315,9 @@ helpers.defineEnumerableProperties = defineHelper(`
     }
     return obj;
   }
-`);
+`;
 
-helpers.defaults = defineHelper(`
+helpers.defaults = () => template.program.ast`
   export default function _defaults(obj, defaults) {
     var keys = Object.getOwnPropertyNames(defaults);
     for (var i = 0; i < keys.length; i++) {
@@ -333,9 +329,9 @@ helpers.defaults = defineHelper(`
     }
     return obj;
   }
-`);
+`;
 
-helpers.defineProperty = defineHelper(`
+helpers.defineProperty = () => template.program.ast`
   export default function _defineProperty(obj, key, value) {
     // Shortcircuit the slow defineProperty path when possible.
     // We are trying to avoid issues where setters defined on the
@@ -354,9 +350,9 @@ helpers.defineProperty = defineHelper(`
     }
     return obj;
   }
-`);
+`;
 
-helpers.extends = defineHelper(`
+helpers.extends = () => template.program.ast`
   export default function _extends() {
     _extends = Object.assign || function (target) {
       for (var i = 1; i < arguments.length; i++) {
@@ -372,9 +368,29 @@ helpers.extends = defineHelper(`
 
     return _extends.apply(this, arguments);
   }
-`);
+`;
+
+helpers.objectSpread = () => template.program.ast`
+  import defineProperty from "defineProperty";
 
-helpers.get = defineHelper(`
+  export default function _objectSpread(target) {
+    for (var i = 1; i < arguments.length; i++) {
+      var source = (arguments[i] != null) ? arguments[i] : {};
+      var ownKeys = Object.keys(source);
+      if (typeof Object.getOwnPropertySymbols === 'function') {
+        ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function(sym) {
+          return Object.getOwnPropertyDescriptor(source, sym).enumerable;
+        }));
+      }
+      ownKeys.forEach(function(key) {
+        defineProperty(target, key, source[key]);
+      });
+    }
+    return target;
+  }
+`;
+
+helpers.get = () => template.program.ast`
   export default function _get(object, property, receiver) {
     if (object === null) object = Function.prototype;
 
@@ -400,9 +416,9 @@ helpers.get = defineHelper(`
       return getter.call(receiver);
     }
   }
-`);
+`;
 
-helpers.inherits = defineHelper(`
+helpers.inherits = () => template.program.ast`
   export default function _inherits(subClass, superClass) {
     if (typeof superClass !== "function" && superClass !== null) {
       throw new TypeError("Super expression must either be null or a function");
@@ -417,62 +433,73 @@ helpers.inherits = defineHelper(`
     });
     if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
   }
-`);
+`;
 
-helpers.inheritsLoose = defineHelper(`
+helpers.inheritsLoose = () => template.program.ast`
   export default function _inheritsLoose(subClass, superClass) {
     subClass.prototype = Object.create(superClass.prototype);
     subClass.prototype.constructor = subClass;
     subClass.__proto__ = superClass;
   }
-`);
+`;
 
 // Based on https://github.com/WebReflection/babel-plugin-transform-builtin-classes
-helpers.wrapNativeSuper = defineHelper(`
-  var _gPO = Object.getPrototypeOf || function _gPO(o) { return o.__proto__ };
-  var _sPO = Object.setPrototypeOf || function _sPO(o, p) { o.__proto__ = p; return o };
-  var _construct = (typeof Reflect === "object" && Reflect.construct) ||
-    function _construct(Parent, args, Class) {
-      var Constructor, a = [null];
-      a.push.apply(a, args);
-      Constructor = Parent.bind.apply(Parent, a);
-      return _sPO(new Constructor, Class.prototype);
-    };
-
-  var _cache = typeof Map === "function" && new Map();
+helpers.wrapNativeSuper = () => template.program.ast`
+  function _gPO(o) {
+    _gPO = Object.getPrototypeOf || function _gPO(o) { return o.__proto__ };
+    return _gPO(o);
+  }
+  function _sPO(o, p) {
+    _sPO = Object.setPrototypeOf || function _sPO(o, p) { o.__proto__ = p; return o };
+    return _sPO(o, p);
+  }
+  function _construct(Parent, args, Class) {
+    _construct = (typeof Reflect === "object" && Reflect.construct) ||
+      function _construct(Parent, args, Class) {
+        var Constructor, a = [null];
+        a.push.apply(a, args);
+        Constructor = Parent.bind.apply(Parent, a);
+        return _sPO(new Constructor, Class.prototype);
+      };
+    return _construct(Parent, args, Class);
+  }
 
   export default function _wrapNativeSuper(Class) {
-    if (typeof Class !== "function") {
-      throw new TypeError("Super expression must either be null or a function");
-    }
+    var _cache = typeof Map === "function" ? new Map() : undefined;
 
-    if (typeof _cache !== "undefined") {
-      if (_cache.has(Class)) return _cache.get(Class);
-      _cache.set(Class, Wrapper);
+    _wrapNativeSuper = function _wrapNativeSuper(Class) {
+      if (typeof Class !== "function") {
+        throw new TypeError("Super expression must either be null or a function");
+      }
+      if (typeof _cache !== "undefined") {
+        if (_cache.has(Class)) return _cache.get(Class);
+        _cache.set(Class, Wrapper);
+      }
+      function Wrapper() {}
+      Wrapper.prototype = Object.create(Class.prototype, {
+        constructor: {
+          value: Wrapper,
+          enumerable: false,
+          writable: true,
+          configurable: true,
+        }
+      });
+      return _sPO(
+        Wrapper,
+        _sPO(
+          function Super() {
+            return _construct(Class, arguments, _gPO(this).constructor);
+          },
+          Class
+        )
+      );
     }
 
-    function Wrapper() {}
-    Wrapper.prototype = Object.create(Class.prototype, {
-      constructor: {
-        value: Wrapper,
-        enumerable: false,
-        writeable: true,
-        configurable: true,
-      }
-    });
-    return _sPO(
-      Wrapper,
-      _sPO(
-        function Super() {
-          return _construct(Class, arguments, _gPO(this).constructor);
-        },
-        Class
-      )
-    );
-  }
-`);
-
-helpers.instanceof = defineHelper(`
+    return _wrapNativeSuper(Class)
+  }
+`;
+
+helpers.instanceof = () => template.program.ast`
   export default function _instanceof(left, right) {
     if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) {
       return right[Symbol.hasInstance](left);
@@ -480,15 +507,15 @@ helpers.instanceof = defineHelper(`
       return left instanceof right;
     }
   }
-`);
+`;
 
-helpers.interopRequireDefault = defineHelper(`
+helpers.interopRequireDefault = () => template.program.ast`
   export default function _interopRequireDefault(obj) {
     return obj && obj.__esModule ? obj : { default: obj };
   }
-`);
+`;
 
-helpers.interopRequireWildcard = defineHelper(`
+helpers.interopRequireWildcard = () => template.program.ast`
   export default function _interopRequireWildcard(obj) {
     if (obj && obj.__esModule) {
       return obj;
@@ -512,23 +539,23 @@ helpers.interopRequireWildcard = defineHelper(`
       return newObj;
     }
   }
-`);
+`;
 
-helpers.newArrowCheck = defineHelper(`
+helpers.newArrowCheck = () => template.program.ast`
   export default function _newArrowCheck(innerThis, boundThis) {
     if (innerThis !== boundThis) {
       throw new TypeError("Cannot instantiate an arrow function");
     }
   }
-`);
+`;
 
-helpers.objectDestructuringEmpty = defineHelper(`
+helpers.objectDestructuringEmpty = () => template.program.ast`
   export default function _objectDestructuringEmpty(obj) {
     if (obj == null) throw new TypeError("Cannot destructure undefined");
   }
-`);
+`;
 
-helpers.objectWithoutProperties = defineHelper(`
+helpers.objectWithoutProperties = () => template.program.ast`
   export default function _objectWithoutProperties(source, excluded) {
     if (source == null) return {};
 
@@ -554,33 +581,29 @@ helpers.objectWithoutProperties = defineHelper(`
 
     return target;
   }
-`);
+`;
 
-helpers.assertThisInitialized = defineHelper(`
+helpers.assertThisInitialized = () => template.program.ast`
   export default function _assertThisInitialized(self) {
     if (self === void 0) {
       throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
     }
     return self;
   }
-`);
+`;
+
+helpers.possibleConstructorReturn = () => template.program.ast`
+  import assertThisInitialized from "assertThisInitialized";
 
-helpers.possibleConstructorReturn = defineHelper(`
   export default function _possibleConstructorReturn(self, call) {
     if (call && (typeof call === "object" || typeof call === "function")) {
       return call;
     }
-    // TODO: Should just be
-    //   import assertThisInitialized from "assertThisInitialized";
-    //   return assertThisInitialized(self);
-    if (self === void 0) {
-      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
-    }
-    return self;
+    return assertThisInitialized(self);
   }
-`);
+`;
 
-helpers.set = defineHelper(`
+helpers.set = () => template.program.ast`
   export default function _set(object, property, value, receiver) {
     var desc = Object.getOwnPropertyDescriptor(object, property);
 
@@ -602,88 +625,26 @@ helpers.set = defineHelper(`
 
     return value;
   }
-`);
-
-helpers.slicedToArray = defineHelper(`
-  // Broken out into a separate function to avoid deoptimizations due to the try/catch for the
-  // array iterator case.
-  function _sliceIterator(arr, i) {
-    // this is an expanded form of \`for...of\` that properly supports abrupt completions of
-    // iterators etc. variable names have been minimised to reduce the size of this massive
-    // helper. sometimes spec compliancy is annoying :(
-    //
-    // _n = _iteratorNormalCompletion
-    // _d = _didIteratorError
-    // _e = _iteratorError
-    // _i = _iterator
-    // _s = _step
-
-    var _arr = [];
-    var _n = true;
-    var _d = false;
-    var _e = undefined;
-    try {
-      for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
-        _arr.push(_s.value);
-        if (i && _arr.length === i) break;
-      }
-    } catch (err) {
-      _d = true;
-      _e = err;
-    } finally {
-      try {
-        if (!_n && _i["return"] != null) _i["return"]();
-      } finally {
-        if (_d) throw _e;
-      }
-    }
-    return _arr;
-  }
+`;
 
-  export default function _slicedToArray(arr, i) {
-    if (Array.isArray(arr)) {
-      return arr;
-    } else if (Symbol.iterator in Object(arr)) {
-      return _sliceIterator(arr, i);
-    } else {
-      throw new TypeError("Invalid attempt to destructure non-iterable instance");
-    }
-  }
-`);
-
-helpers.slicedToArrayLoose = defineHelper(`
-  export default function _slicedToArrayLoose(arr, i) {
-    if (Array.isArray(arr)) {
-      return arr;
-    } else if (Symbol.iterator in Object(arr)) {
-      var _arr = [];
-      for (var _iterator = arr[Symbol.iterator](), _step; !(_step = _iterator.next()).done;) {
-        _arr.push(_step.value);
-        if (i && _arr.length === i) break;
-      }
-      return _arr;
-    } else {
-      throw new TypeError("Invalid attempt to destructure non-iterable instance");
-    }
-  }
-`);
-
-helpers.taggedTemplateLiteral = defineHelper(`
+helpers.taggedTemplateLiteral = () => template.program.ast`
   export default function _taggedTemplateLiteral(strings, raw) {
+    if (!raw) { raw = strings.slice(0); }
     return Object.freeze(Object.defineProperties(strings, {
         raw: { value: Object.freeze(raw) }
     }));
   }
-`);
+`;
 
-helpers.taggedTemplateLiteralLoose = defineHelper(`
+helpers.taggedTemplateLiteralLoose = () => template.program.ast`
   export default function _taggedTemplateLiteralLoose(strings, raw) {
+    if (!raw) { raw = strings.slice(0); }
     strings.raw = raw;
     return strings;
   }
-`);
+`;
 
-helpers.temporalRef = defineHelper(`
+helpers.temporalRef = () => template.program.ast`
   import undef from "temporalUndefined";
 
   export default function _temporalRef(val, name) {
@@ -693,42 +654,147 @@ helpers.temporalRef = defineHelper(`
       return val;
     }
   }
-`);
+`;
 
-helpers.readOnlyError = defineHelper(`
+helpers.readOnlyError = () => template.program.ast`
   export default function _readOnlyError(name) {
     throw new Error("\\"" + name + "\\" is read-only");
   }
-`);
+`;
 
-helpers.classNameTDZError = defineHelper(`
+helpers.classNameTDZError = () => template.program.ast`
   export default function _classNameTDZError(name) {
     throw new Error("Class \\"" + name + "\\" cannot be referenced in computed property keys.");
   }
-`);
+`;
 
-helpers.temporalUndefined = defineHelper(`
+helpers.temporalUndefined = () => template.program.ast`
   export default {};
-`);
+`;
+
+helpers.slicedToArray = () => template.program.ast`
+  import arrayWithHoles from "arrayWithHoles";
+  import iterableToArrayLimit from "iterableToArrayLimit";
+  import nonIterableRest from "nonIterableRest";
+
+  export default function _slicedToArray(arr, i) {
+    return arrayWithHoles(arr) || iterableToArrayLimit(arr, i) || nonIterableRest();
+  }
+`;
+
+helpers.slicedToArrayLoose = () => template.program.ast`
+  import arrayWithHoles from "arrayWithHoles";
+  import iterableToArrayLimitLoose from "iterableToArrayLimitLoose";
+  import nonIterableRest from "nonIterableRest";
+
+  export default function _slicedToArrayLoose(arr, i) {
+    return arrayWithHoles(arr) || iterableToArrayLimitLoose(arr, i) || nonIterableRest();
+  }
+`;
+
+helpers.toArray = () => template.program.ast`
+  import arrayWithHoles from "arrayWithHoles";
+  import iterableToArray from "iterableToArray";
+  import nonIterableRest from "nonIterableRest";
 
-helpers.toArray = defineHelper(`
   export default function _toArray(arr) {
-    return Array.isArray(arr) ? arr : Array.from(arr);
+    return arrayWithHoles(arr) || iterableToArray(arr) || nonIterableRest();
   }
-`);
+`;
+
+helpers.toConsumableArray = () => template.program.ast`
+  import arrayWithoutHoles from "arrayWithoutHoles";
+  import iterableToArray from "iterableToArray";
+  import nonIterableSpread from "nonIterableSpread";
 
-helpers.toConsumableArray = defineHelper(`
   export default function _toConsumableArray(arr) {
+    return arrayWithoutHoles(arr) || iterableToArray(arr) || nonIterableSpread();
+  }
+`;
+
+helpers.arrayWithoutHoles = () => template.program.ast`
+  export default function _arrayWithoutHoles(arr) {
     if (Array.isArray(arr)) {
       for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
       return arr2;
-    } else {
-      return Array.from(arr);
     }
   }
-`);
+`;
+
+helpers.arrayWithHoles = () => template.program.ast`
+  export default function _arrayWithoutHoles(arr) {
+    if (Array.isArray(arr)) return arr;
+  }
+`;
+
+helpers.iterableToArray = () => template.program.ast`
+  export default function _iterableToArray(iter) {
+    if (
+      Symbol.iterator in Object(iter) ||
+      Object.prototype.toString.call(iter) === "[object Arguments]"
+    ) return Array.from(iter);
+  }
+`;
+
+helpers.iterableToArrayLimit = () => template.program.ast`
+  export default function _iterableToArrayLimit(arr, i) {
+    // this is an expanded form of \`for...of\` that properly supports abrupt completions of
+    // iterators etc. variable names have been minimised to reduce the size of this massive
+    // helper. sometimes spec compliancy is annoying :(
+    //
+    // _n = _iteratorNormalCompletion
+    // _d = _didIteratorError
+    // _e = _iteratorError
+    // _i = _iterator
+    // _s = _step
+
+    var _arr = [];
+    var _n = true;
+    var _d = false;
+    var _e = undefined;
+    try {
+      for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
+        _arr.push(_s.value);
+        if (i && _arr.length === i) break;
+      }
+    } catch (err) {
+      _d = true;
+      _e = err;
+    } finally {
+      try {
+        if (!_n && _i["return"] != null) _i["return"]();
+      } finally {
+        if (_d) throw _e;
+      }
+    }
+    return _arr;
+  }
+`;
+
+helpers.iterableToArrayLimitLoose = () => template.program.ast`
+  export default function _iterableToArrayLimitLoose(arr, i) {
+    var _arr = [];
+    for (var _iterator = arr[Symbol.iterator](), _step; !(_step = _iterator.next()).done;) {
+      _arr.push(_step.value);
+      if (i && _arr.length === i) break;
+    }
+    return _arr;
+  }
+`;
+
+helpers.nonIterableSpread = () => template.program.ast`
+  export default function _nonIterableSpread() {
+    throw new TypeError("Invalid attempt to spread non-iterable instance");
+  }
+`;
+
+helpers.nonIterableRest = () => template.program.ast`
+  export default function _nonIterableRest() {
+    throw new TypeError("Invalid attempt to destructure non-iterable instance");
+  }
+`;
 
-helpers.skipFirstGeneratorNext = defineHelper(`
+helpers.skipFirstGeneratorNext = () => template.program.ast`
   export default function _skipFirstGeneratorNext(fn) {
     return function () {
       var it = fn.apply(this, arguments);
@@ -736,9 +802,9 @@ helpers.skipFirstGeneratorNext = defineHelper(`
       return it;
     }
   }
-`);
+`;
 
-helpers.toPropertyKey = defineHelper(`
+helpers.toPropertyKey = () => template.program.ast`
   export default function _toPropertyKey(key) {
     if (typeof key === "symbol") {
       return key;
@@ -746,13 +812,13 @@ helpers.toPropertyKey = defineHelper(`
       return String(key);
     }
   }
-`);
+`;
 
 /**
  * Add a helper that will throw a useful error if the transform fails to detect the class
  * property assignment, so users know something failed.
  */
-helpers.initializerWarningHelper = defineHelper(`
+helpers.initializerWarningHelper = () => template.program.ast`
     export default function _initializerWarningHelper(descriptor, context){
         throw new Error(
           'Decorating class property failed. Please ensure that ' +
@@ -761,12 +827,12 @@ helpers.initializerWarningHelper = defineHelper(`
           'the next major version of decorators in stage 2.'
         );
     }
-`);
+`;
 
 /**
  * Add a helper to call as a replacement for class property definition.
  */
-helpers.initializerDefineProperty = defineHelper(`
+helpers.initializerDefineProperty = () => template.program.ast`
     export default function _initializerDefineProperty(target, property, descriptor, context){
         if (!descriptor) return;
 
@@ -777,13 +843,13 @@ helpers.initializerDefineProperty = defineHelper(`
             value: descriptor.initializer ? descriptor.initializer.call(context) : void 0,
         });
     }
-`);
+`;
 
 /**
  * Add a helper to take an initial descriptor, apply some decorators to it, and optionally
  * define the property.
  */
-helpers.applyDecoratedDescriptor = defineHelper(`
+helpers.applyDecoratedDescriptor = () => template.program.ast`
     export default function _applyDecoratedDescriptor(target, property, decorators, descriptor, context){
         var desc = {};
         Object['ke' + 'ys'](descriptor).forEach(function(key){
@@ -813,4 +879,4 @@ helpers.applyDecoratedDescriptor = defineHelper(`
 
         return desc;
     }
-`);
+`;
diff --git a/packages/babel-highlight/.npmignore b/packages/babel-highlight/.npmignore
new file mode 100644
index 0000000000000..f9806945836eb
--- /dev/null
+++ b/packages/babel-highlight/.npmignore
@@ -0,0 +1,3 @@
+src
+test
+*.log
diff --git a/packages/babel-highlight/README.md b/packages/babel-highlight/README.md
new file mode 100644
index 0000000000000..36143844eb010
--- /dev/null
+++ b/packages/babel-highlight/README.md
@@ -0,0 +1,41 @@
+# @babel/highlight
+
+> Syntax highlight JavaScript strings for output in terminals.
+
+## Install
+
+```sh
+npm install --save @babel/highlight
+```
+
+## Usage
+
+```js
+import highlight from "@babel/highlight";
+
+const code = `class Foo {
+  constructor()
+}`;
+
+const result = highlight(code);
+
+console.log(result);
+```
+
+```js
+class Foo {
+  constructor()
+}
+```
+
+By default, `highlight` will not highlight your code if your terminal does not support color. To force colors, pass `{ forceColor: true }` as the second argument to `highlight`.
+
+```js
+import highlight from "@babel/highlight";
+
+const code = `class Foo {
+  constructor()
+}`;
+
+const result = highlight(code, { forceColor: true });
+```
diff --git a/packages/babel-highlight/package.json b/packages/babel-highlight/package.json
new file mode 100644
index 0000000000000..805c86a084df0
--- /dev/null
+++ b/packages/babel-highlight/package.json
@@ -0,0 +1,18 @@
+{
+  "name": "@babel/highlight",
+  "version": "7.0.0-beta.42",
+  "description": "Syntax highlight JavaScript strings for output in terminals.",
+  "author": "suchipi <me@suchipi.com>",
+  "homepage": "https://babeljs.io/",
+  "license": "MIT",
+  "repository": "https://github.com/babel/babel/tree/master/packages/babel-highlight",
+  "main": "lib/index.js",
+  "dependencies": {
+    "chalk": "^2.0.0",
+    "esutils": "^2.0.2",
+    "js-tokens": "^3.0.0"
+  },
+  "devDependencies": {
+    "strip-ansi": "^4.0.0"
+  }
+}
diff --git a/packages/babel-highlight/src/index.js b/packages/babel-highlight/src/index.js
new file mode 100644
index 0000000000000..cc98a49f85a31
--- /dev/null
+++ b/packages/babel-highlight/src/index.js
@@ -0,0 +1,127 @@
+import jsTokens, { matchToToken } from "js-tokens";
+import esutils from "esutils";
+import Chalk from "chalk";
+
+/**
+ * Chalk styles for token types.
+ */
+function getDefs(chalk) {
+  return {
+    keyword: chalk.cyan,
+    capitalized: chalk.yellow,
+    jsx_tag: chalk.yellow,
+    punctuator: chalk.yellow,
+    // bracket:  intentionally omitted.
+    number: chalk.magenta,
+    string: chalk.green,
+    regex: chalk.magenta,
+    comment: chalk.grey,
+    invalid: chalk.white.bgRed.bold,
+  };
+}
+
+/**
+ * RegExp to test for newlines in terminal.
+ */
+const NEWLINE = /\r\n|[\n\r\u2028\u2029]/;
+
+/**
+ * RegExp to test for what seems to be a JSX tag name.
+ */
+const JSX_TAG = /^[a-z][\w-]*$/i;
+
+/**
+ * RegExp to test for the three types of brackets.
+ */
+const BRACKET = /^[()[\]{}]$/;
+
+/**
+ * Get the type of token, specifying punctuator type.
+ */
+function getTokenType(match) {
+  const [offset, text] = match.slice(-2);
+  const token = matchToToken(match);
+
+  if (token.type === "name") {
+    if (esutils.keyword.isReservedWordES6(token.value)) {
+      return "keyword";
+    }
+
+    if (
+      JSX_TAG.test(token.value) &&
+      (text[offset - 1] === "<" || text.substr(offset - 2, 2) == "</")
+    ) {
+      return "jsx_tag";
+    }
+
+    if (token.value[0] !== token.value[0].toLowerCase()) {
+      return "capitalized";
+    }
+  }
+
+  if (token.type === "punctuator" && BRACKET.test(token.value)) {
+    return "bracket";
+  }
+
+  if (
+    token.type === "invalid" &&
+    (token.value === "@" || token.value === "#")
+  ) {
+    return "punctuator";
+  }
+
+  return token.type;
+}
+
+/**
+ * Highlight `text` using the token definitions in `defs`.
+ */
+function highlightTokens(defs: Object, text: string) {
+  return text.replace(jsTokens, function(...args) {
+    const type = getTokenType(args);
+    const colorize = defs[type];
+    if (colorize) {
+      return args[0]
+        .split(NEWLINE)
+        .map(str => colorize(str))
+        .join("\n");
+    } else {
+      return args[0];
+    }
+  });
+}
+
+type Options = {
+  forceColor?: boolean,
+};
+
+/**
+ * Whether the code should be highlighted given the passed options.
+ */
+export function shouldHighlight(options: Options): boolean {
+  return Chalk.supportsColor || options.forceColor;
+}
+
+/**
+ * The Chalk instance that should be used given the passed options.
+ */
+export function getChalk(options: Options) {
+  let chalk = Chalk;
+  if (options.forceColor) {
+    chalk = new Chalk.constructor({ enabled: true, level: 1 });
+  }
+  return chalk;
+}
+
+/**
+ * Highlight `code`.
+ */
+export default function highlight(code: string, options: Options = {}): string {
+  if (shouldHighlight(options)) {
+    const chalk = getChalk(options);
+    const defs = getDefs(chalk);
+    return highlightTokens(defs, code);
+  } else {
+    return code;
+  }
+}
diff --git a/packages/babel-highlight/test/index.js b/packages/babel-highlight/test/index.js
new file mode 100644
index 0000000000000..774fbcd669b33
--- /dev/null
+++ b/packages/babel-highlight/test/index.js
@@ -0,0 +1,118 @@
+import assert from "assert";
+import chalk from "chalk";
+import stripAnsi from "strip-ansi";
+import highlight, { shouldHighlight, getChalk } from "..";
+
+describe("@babel/highlight", function() {
+  function stubColorSupport(supported) {
+    let originalSupportsColor;
+    beforeEach(function() {
+      originalSupportsColor = chalk.supportsColor;
+      chalk.supportsColor = supported;
+    });
+
+    afterEach(function() {
+      chalk.supportsColor = originalSupportsColor;
+    });
+  }
+
+  describe("highlight", function() {
+    describe("when colors are supported", function() {
+      stubColorSupport(true);
+
+      it("highlights code", function() {
+        const code = "console.log('hi')";
+        const result = highlight(code);
+        const stripped = stripAnsi(result);
+        assert.ok(result.length > stripped.length);
+        assert.equal(stripped, code);
+      });
+    });
+
+    describe("when colors are not supported", function() {
+      stubColorSupport(false);
+
+      it("does not attempt to highlight code", function() {
+        const code = "console.log('hi')";
+        const result = highlight(code);
+        const stripped = stripAnsi(result);
+        assert.ok(result.length === stripped.length);
+        assert.equal(result, code);
+      });
+
+      describe("and the forceColor option is passed", function() {
+        it("highlights the code anyway", function() {
+          const code = "console.log('hi')";
+          const result = highlight(code, { forceColor: true });
+          const stripped = stripAnsi(result);
+          assert.ok(result.length > stripped.length);
+          assert.equal(stripped, code);
+        });
+      });
+    });
+  });
+
+  describe("shouldHighlight", function() {
+    describe("when colors are supported", function() {
+      stubColorSupport(true);
+
+      it("returns true", function() {
+        assert.ok(shouldHighlight({}));
+      });
+    });
+
+    describe("when colors are not supported", function() {
+      stubColorSupport(false);
+
+      it("returns false", function() {
+        assert.ok(!shouldHighlight({}));
+      });
+
+      describe("and the forceColor option is passed", function() {
+        it("returns true", function() {
+          assert.ok(shouldHighlight({ forceColor: true }));
+        });
+      });
+    });
+  });
+
+  describe("getChalk", function() {
+    describe("when colors are supported", function() {
+      stubColorSupport(true);
+
+      describe("when forceColor is not passed", function() {
+        it("returns a Chalk instance", function() {
+          assert.equal(getChalk({}).constructor, chalk.constructor);
+        });
+      });
+
+      describe("when forceColor is passed", function() {
+        it("returns a Chalk instance", function() {
+          assert.equal(
+            getChalk({ forceColor: true }).constructor,
+            chalk.constructor,
+          );
+        });
+      });
+    });
+
+    describe("when colors are supported", function() {
+      stubColorSupport(true);
+
+      describe("when forceColor is not passed", function() {
+        it("returns a Chalk instance", function() {
+          assert.equal(getChalk({}).constructor, chalk.constructor);
+        });
+      });
+
+      describe("when forceColor is passed", function() {
+        it("returns a Chalk instance", function() {
+          assert.equal(
+            getChalk({ forceColor: true }).constructor,
+            chalk.constructor,
+          );
+        });
+      });
+    });
+  });
+});
diff --git a/packages/babel-node/package.json b/packages/babel-node/package.json
index d038f0248585f..5861359cd82bc 100644
--- a/packages/babel-node/package.json
+++ b/packages/babel-node/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/node",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel command line",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -16,8 +16,8 @@
     "compiler"
   ],
   "dependencies": {
-    "@babel/polyfill": "7.0.0-beta.39",
-    "@babel/register": "7.0.0-beta.39",
+    "@babel/polyfill": "7.0.0-beta.42",
+    "@babel/register": "7.0.0-beta.42",
     "commander": "^2.8.1",
     "fs-readdir-recursive": "^1.0.0",
     "lodash": "^4.2.0",
@@ -25,11 +25,11 @@
     "v8flags": "^3.0.0"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-fixtures": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-fixtures": "7.0.0-beta.42"
   },
   "bin": {
     "babel-node": "./bin/babel-node.js"
diff --git a/packages/babel-node/src/babel-node.js b/packages/babel-node/src/babel-node.js
index cc1ed88c32c51..31e3634a1a8ae 100755
--- a/packages/babel-node/src/babel-node.js
+++ b/packages/babel-node/src/babel-node.js
@@ -46,6 +46,7 @@ getV8Flags(function(err, v8Flags) {
       case "--debug":
       case "--debug-brk":
       case "--inspect":
+      case "--inspect-brk":
         args.unshift(arg);
         break;
 
@@ -94,5 +95,9 @@ getV8Flags(function(err, v8Flags) {
         }
       });
     });
+    process.on("SIGINT", () => {
+      proc.kill("SIGINT");
+      process.exit(1);
+    });
   }
 });
diff --git a/packages/babel-node/test/index.js b/packages/babel-node/test/index.js
index 6e48f0f2abb29..4643475255e80 100644
--- a/packages/babel-node/test/index.js
+++ b/packages/babel-node/test/index.js
@@ -177,6 +177,16 @@ fs.readdirSync(fixtureLoc).forEach(function(binName) {
 
   const suiteLoc = path.join(fixtureLoc, binName);
   describe("bin/" + binName, function() {
+    let cwd;
+
+    beforeEach(() => {
+      cwd = process.cwd();
+    });
+
+    afterEach(() => {
+      process.chdir(cwd);
+    });
+
     fs.readdirSync(suiteLoc).forEach(function(testName) {
       if (testName[0] === ".") return;
 
diff --git a/packages/babel-plugin-external-helpers/package.json b/packages/babel-plugin-external-helpers/package.json
index cb7ab8253dcb6..dada76aed7c57 100644
--- a/packages/babel-plugin-external-helpers/package.json
+++ b/packages/babel-plugin-external-helpers/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-external-helpers",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "This plugin contains helper functions that’ll be placed at the top of the generated code",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-external-helpers",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-external-helpers/src/index.js b/packages/babel-plugin-external-helpers/src/index.js
index d11c7f19a0ee6..219da24f9b35b 100644
--- a/packages/babel-plugin-external-helpers/src/index.js
+++ b/packages/babel-plugin-external-helpers/src/index.js
@@ -1,9 +1,12 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     pre(file) {
       file.set("helpersNamespace", t.identifier("babelHelpers"));
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-async-generator-functions/package.json b/packages/babel-plugin-proposal-async-generator-functions/package.json
index 84cabee44325f..926ce0bc694ea 100644
--- a/packages/babel-plugin-proposal-async-generator-functions/package.json
+++ b/packages/babel-plugin-proposal-async-generator-functions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-async-generator-functions",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Turn async generator functions into ES2015 generators",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-async-generator-functions",
   "license": "MIT",
@@ -9,14 +9,15 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-remap-async-to-generator": "7.0.0-beta.39",
-    "@babel/plugin-syntax-async-generators": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/helper-remap-async-to-generator": "7.0.0-beta.42",
+    "@babel/plugin-syntax-async-generators": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-helper-remap-async-to-generator/src/for-await.js b/packages/babel-plugin-proposal-async-generator-functions/src/for-await.js
similarity index 75%
rename from packages/babel-helper-remap-async-to-generator/src/for-await.js
rename to packages/babel-plugin-proposal-async-generator-functions/src/for-await.js
index b9b55b615fff0..4763b2854ccf9 100644
--- a/packages/babel-helper-remap-async-to-generator/src/for-await.js
+++ b/packages/babel-plugin-proposal-async-generator-functions/src/for-await.js
@@ -1,8 +1,7 @@
-import * as t from "@babel/types";
-import template from "@babel/template";
+import { types as t, template } from "@babel/core";
 
-const awaitTemplate = `
-  function* wrapper() {
+const buildForAwait = template(`
+  async function wrapper() {
     var ITERATOR_COMPLETION = true;
     var ITERATOR_HAD_ERROR_KEY = false;
     var ITERATOR_ERROR_KEY;
@@ -10,9 +9,9 @@ const awaitTemplate = `
       for (
         var ITERATOR_KEY = GET_ITERATOR(OBJECT), STEP_KEY, STEP_VALUE;
         (
-          STEP_KEY = yield AWAIT(ITERATOR_KEY.next()),
+          STEP_KEY = await ITERATOR_KEY.next(),
           ITERATOR_COMPLETION = STEP_KEY.done,
-          STEP_VALUE = yield AWAIT(STEP_KEY.value),
+          STEP_VALUE = await STEP_KEY.value,
           !ITERATOR_COMPLETION
         );
         ITERATOR_COMPLETION = true) {
@@ -23,7 +22,7 @@ const awaitTemplate = `
     } finally {
       try {
         if (!ITERATOR_COMPLETION && ITERATOR_KEY.return != null) {
-          yield AWAIT(ITERATOR_KEY.return());
+          await ITERATOR_KEY.return();
         }
       } finally {
         if (ITERATOR_HAD_ERROR_KEY) {
@@ -32,13 +31,9 @@ const awaitTemplate = `
       }
     }
   }
-`;
-const buildForAwait = template(awaitTemplate);
-const buildForAwaitWithoutWrapping = template(
-  awaitTemplate.replace(/\bAWAIT\b/g, ""),
-);
+`);
 
-export default function(path, { getAsyncIterator, wrapAwait }) {
+export default function(path, { getAsyncIterator }) {
   const { node, scope, parent } = path;
 
   const stepKey = scope.generateUidIdentifier("step");
@@ -57,9 +52,7 @@ export default function(path, { getAsyncIterator, wrapAwait }) {
       t.variableDeclarator(left.declarations[0].id, stepValue),
     ]);
   }
-
-  const build = wrapAwait ? buildForAwait : buildForAwaitWithoutWrapping;
-  let template = build({
+  let template = buildForAwait({
     ITERATOR_HAD_ERROR_KEY: scope.generateUidIdentifier("didIteratorError"),
     ITERATOR_COMPLETION: scope.generateUidIdentifier(
       "iteratorNormalCompletion",
@@ -70,10 +63,9 @@ export default function(path, { getAsyncIterator, wrapAwait }) {
     OBJECT: node.right,
     STEP_VALUE: stepValue,
     STEP_KEY: stepKey,
-    ...(wrapAwait ? { AWAIT: wrapAwait } : {}),
   });
 
-  // remove generator function wrapper
+  // remove async function wrapper
   template = template.body.body;
 
   const isLabeledParent = t.isLabeledStatement(parent);
diff --git a/packages/babel-plugin-proposal-async-generator-functions/src/index.js b/packages/babel-plugin-proposal-async-generator-functions/src/index.js
index 4c55a9787eaee..f68cdaa6a282e 100644
--- a/packages/babel-plugin-proposal-async-generator-functions/src/index.js
+++ b/packages/babel-plugin-proposal-async-generator-functions/src/index.js
@@ -1,8 +1,12 @@
+import { declare } from "@babel/helper-plugin-utils";
 import remapAsyncToGenerator from "@babel/helper-remap-async-to-generator";
 import syntaxAsyncGenerators from "@babel/plugin-syntax-async-generators";
 import { types as t } from "@babel/core";
+import rewriteForAwait from "./for-await";
+
+export default declare(api => {
+  api.assertVersion(7);
 
-export default function() {
   const yieldStarVisitor = {
     Function(path) {
       path.skip();
@@ -18,19 +22,74 @@ export default function() {
     },
   };
 
+  const forAwaitVisitor = {
+    Function(path) {
+      path.skip();
+    },
+
+    ForOfStatement(path, { file }) {
+      const { node } = path;
+      if (!node.await) return;
+
+      const build = rewriteForAwait(path, {
+        getAsyncIterator: file.addHelper("asyncIterator"),
+      });
+
+      const { declar, loop } = build;
+      const block = loop.body;
+
+      // ensure that it's a block so we can take all its statements
+      path.ensureBlock();
+
+      // add the value declaration to the new loop body
+      if (declar) {
+        block.body.push(declar);
+      }
+
+      // push the rest of the original loop body onto our new body
+      block.body = block.body.concat(node.body.body);
+
+      t.inherits(loop, node);
+      t.inherits(loop.body, node.body);
+
+      if (build.replaceParent) {
+        path.parentPath.replaceWithMultiple(build.node);
+      } else {
+        path.replaceWithMultiple(build.node);
+      }
+    },
+  };
+
+  const visitor = {
+    Function(path, state) {
+      if (!path.node.async) return;
+
+      path.traverse(forAwaitVisitor, state);
+
+      if (!path.node.generator) return;
+
+      path.traverse(yieldStarVisitor, state);
+
+      remapAsyncToGenerator(path, {
+        wrapAsync: state.addHelper("wrapAsyncGenerator"),
+        wrapAwait: state.addHelper("awaitAsyncGenerator"),
+      });
+    },
+  };
+
   return {
     inherits: syntaxAsyncGenerators,
     visitor: {
-      Function(path, state) {
-        if (!path.node.async || !path.node.generator) return;
-
-        path.traverse(yieldStarVisitor, state);
-
-        remapAsyncToGenerator(path, state.file, {
-          wrapAsync: state.addHelper("wrapAsyncGenerator"),
-          wrapAwait: state.addHelper("awaitAsyncGenerator"),
-        });
+      Program(path, state) {
+        // We need to traverse the ast here (instead of just vising Function
+        // in the top level visitor) because for-await needs to run before the
+        // async-to-generator plugin. This is because for-await is transpiled
+        // using "await" expressions, which are then converted to "yield".
+        //
+        // This is bad for performance, but plugin ordering will allow as to
+        // directly visit Function in the top level visitor.
+        path.traverse(visitor, state);
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/for-await/async-function-no-transform/input.js b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/for-await/async-function-no-transform/input.js
new file mode 100644
index 0000000000000..daedfaf473635
--- /dev/null
+++ b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/for-await/async-function-no-transform/input.js
@@ -0,0 +1,3 @@
+async function foo() {
+	for await (const x of y) {}
+}
diff --git a/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/for-await/async-function-no-transform/options.json b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/for-await/async-function-no-transform/options.json
new file mode 100644
index 0000000000000..5adee4863d3d9
--- /dev/null
+++ b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/for-await/async-function-no-transform/options.json
@@ -0,0 +1,6 @@
+{
+  "plugins": [
+    "external-helpers",
+    "proposal-async-generator-functions"
+  ]
+}
diff --git a/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/for-await/async-function-no-transform/output.js b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/for-await/async-function-no-transform/output.js
new file mode 100644
index 0000000000000..d7801fa319365
--- /dev/null
+++ b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/for-await/async-function-no-transform/output.js
@@ -0,0 +1,25 @@
+async function foo() {
+  var _iteratorNormalCompletion = true;
+  var _didIteratorError = false;
+
+  var _iteratorError;
+
+  try {
+    for (var _iterator = babelHelpers.asyncIterator(y), _step, _value; _step = await _iterator.next(), _iteratorNormalCompletion = _step.done, _value = await _step.value, !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {
+      const x = _value;
+    }
+  } catch (err) {
+    _didIteratorError = true;
+    _iteratorError = err;
+  } finally {
+    try {
+      if (!_iteratorNormalCompletion && _iterator.return != null) {
+        await _iterator.return();
+      }
+    } finally {
+      if (_didIteratorError) {
+        throw _iteratorError;
+      }
+    }
+  }
+}
diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/5880/input.js b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/5880/input.js
similarity index 100%
rename from packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/5880/input.js
rename to packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/5880/input.js
diff --git a/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/5880/options.json b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/5880/options.json
new file mode 100644
index 0000000000000..94063e0c4f2ab
--- /dev/null
+++ b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/5880/options.json
@@ -0,0 +1,7 @@
+{
+  "plugins": [
+    "external-helpers",
+    "proposal-async-generator-functions",
+    "transform-destructuring"
+  ]
+}
diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/5880/output.js b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/5880/output.js
similarity index 75%
rename from packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/5880/output.js
rename to packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/5880/output.js
index f6c0f06d9ce1f..4b9e652d6cbcc 100644
--- a/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/5880/output.js
+++ b/packages/babel-plugin-proposal-async-generator-functions/test/fixtures/regression/5880/output.js
@@ -1,11 +1,11 @@
-babelHelpers.asyncToGenerator(function* () {
+(async () => {
   var _iteratorNormalCompletion = true;
   var _didIteratorError = false;
 
   var _iteratorError;
 
   try {
-    for (var _iterator = babelHelpers.asyncIterator(iterable), _step, _value; _step = yield _iterator.next(), _iteratorNormalCompletion = _step.done, _value = yield _step.value, !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {
+    for (var _iterator = babelHelpers.asyncIterator(iterable), _step, _value; _step = await _iterator.next(), _iteratorNormalCompletion = _step.done, _value = await _step.value, !_iteratorNormalCompletion; _iteratorNormalCompletion = true) {
       const _value2 = _value,
             _value3 = babelHelpers.slicedToArray(_value2, 1),
             value = _value3[0];
@@ -16,7 +16,7 @@ babelHelpers.asyncToGenerator(function* () {
   } finally {
     try {
       if (!_iteratorNormalCompletion && _iterator.return != null) {
-        yield _iterator.return();
+        await _iterator.return();
       }
     } finally {
       if (_didIteratorError) {
diff --git a/packages/babel-plugin-proposal-class-properties/package.json b/packages/babel-plugin-proposal-class-properties/package.json
index f38009fb302cb..c0616ffaa56ac 100644
--- a/packages/babel-plugin-proposal-class-properties/package.json
+++ b/packages/babel-plugin-proposal-class-properties/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-class-properties",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "This plugin transforms static class properties as well as properties declared with the property initializer syntax",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-class-properties",
   "license": "MIT",
@@ -9,14 +9,15 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-function-name": "7.0.0-beta.39",
-    "@babel/plugin-syntax-class-properties": "7.0.0-beta.39"
+    "@babel/helper-function-name": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-class-properties": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-class-properties/src/index.js b/packages/babel-plugin-proposal-class-properties/src/index.js
index 38ecd56fbd894..a826b310ea19c 100644
--- a/packages/babel-plugin-proposal-class-properties/src/index.js
+++ b/packages/babel-plugin-proposal-class-properties/src/index.js
@@ -1,8 +1,11 @@
+import { declare } from "@babel/helper-plugin-utils";
 import nameFunction from "@babel/helper-function-name";
 import syntaxClassProperties from "@babel/plugin-syntax-class-properties";
 import { template, types as t } from "@babel/core";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { loose } = options;
 
   const findBareSupers = {
@@ -247,4 +250,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/general/non-block-arrow-func/input.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/general/non-block-arrow-func/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/general/non-block-arrow-func/input.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/general/non-block-arrow-func/input.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/general/non-block-arrow-func/output.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/general/non-block-arrow-func/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/general/non-block-arrow-func/output.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/general/non-block-arrow-func/output.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T2983/input.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T2983/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T2983/input.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T2983/input.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T2983/output.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T2983/output.mjs
similarity index 67%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T2983/output.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T2983/output.mjs
index 221316a2f1a6d..8eadb530f3506 100644
--- a/packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T2983/output.js
+++ b/packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T2983/output.mjs
@@ -9,15 +9,15 @@ call((_temp = _class = function _class() {
   value: true
 }), _temp));
 
-var _class2 = function _class2() {
-  babelHelpers.classCallCheck(this, _class2);
+var _default = function _default() {
+  babelHelpers.classCallCheck(this, _default);
 };
 
-Object.defineProperty(_class2, "test", {
+Object.defineProperty(_default, "test", {
   configurable: true,
   enumerable: true,
   writable: true,
   value: true
 });
-export { _class2 as default };
+export { _default as default };
 ;
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T7364/input.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T7364/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T7364/input.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T7364/input.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T7364/output.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T7364/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T7364/output.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/general/regression-T7364/output.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/general/static-export/input.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/general/static-export/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/general/static-export/input.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/general/static-export/input.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/general/static-export/output.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/general/static-export/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/general/static-export/output.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/general/static-export/output.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/loose/non-block-arrow-func/input.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/loose/non-block-arrow-func/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/loose/non-block-arrow-func/input.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/loose/non-block-arrow-func/input.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/loose/non-block-arrow-func/output.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/loose/non-block-arrow-func/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/loose/non-block-arrow-func/output.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/loose/non-block-arrow-func/output.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/loose/static-export/input.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/loose/static-export/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/loose/static-export/input.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/loose/static-export/input.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/loose/static-export/output.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/loose/static-export/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/loose/static-export/output.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/loose/static-export/output.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/6154/output.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/6154/output.js
index c272ca164bf88..5561d047d73a5 100644
--- a/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/6154/output.js
+++ b/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/6154/output.js
@@ -2,7 +2,7 @@ function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterat
 
 function _instanceof(left, right) { if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) { return right[Symbol.hasInstance](left); } else { return left instanceof right; } }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
 
 function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
 
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T2983/input.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T2983/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T2983/input.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T2983/input.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T2983/output.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T2983/output.mjs
similarity index 51%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T2983/output.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T2983/output.mjs
index 1ab8d181d8351..371191a12b3dd 100644
--- a/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T2983/output.js
+++ b/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T2983/output.mjs
@@ -4,10 +4,10 @@ call((_temp = _class = function _class() {
   babelHelpers.classCallCheck(this, _class);
 }, _class.test = true, _temp));
 
-var _class2 = function _class2() {
-  babelHelpers.classCallCheck(this, _class2);
+var _default = function _default() {
+  babelHelpers.classCallCheck(this, _default);
 };
 
-_class2.test = true;
-export { _class2 as default };
+_default.test = true;
+export { _default as default };
 ;
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T7364/input.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T7364/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T7364/input.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T7364/input.mjs
diff --git a/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T7364/output.js b/packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T7364/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T7364/output.js
rename to packages/babel-plugin-proposal-class-properties/test/fixtures/regression/T7364/output.mjs
diff --git a/packages/babel-plugin-proposal-decorators/package.json b/packages/babel-plugin-proposal-decorators/package.json
index 08637a557ba99..081f3ea25e6bf 100644
--- a/packages/babel-plugin-proposal-decorators/package.json
+++ b/packages/babel-plugin-proposal-decorators/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-decorators",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "author": "Logan Smyth <loganfsmyth@gmail.com>",
   "license": "MIT",
   "description": "Compile class and object decorators to ES5",
@@ -12,13 +12,14 @@
     "decorators"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-decorators": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-decorators": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-decorators/src/index.js b/packages/babel-plugin-proposal-decorators/src/index.js
index 67884c13023ce..fee3f43d6b246 100644
--- a/packages/babel-plugin-proposal-decorators/src/index.js
+++ b/packages/babel-plugin-proposal-decorators/src/index.js
@@ -1,5 +1,6 @@
 // Fork of https://github.com/loganfsmyth/babel-plugin-proposal-decorators-legacy
 
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxDecorators from "@babel/plugin-syntax-decorators";
 import { template, types as t } from "@babel/core";
 
@@ -26,7 +27,9 @@ const buildGetObjectInitializer = template(`
     })
 `);
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   const WARNING_CALLS = new WeakSet();
 
   /**
@@ -276,4 +279,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/class-export-default/exec.js b/packages/babel-plugin-proposal-decorators/test/fixtures/class-export-default/exec.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-decorators/test/fixtures/class-export-default/exec.js
rename to packages/babel-plugin-proposal-decorators/test/fixtures/class-export-default/exec.mjs
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/class-decorators/input.js b/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/class-decorators/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/class-decorators/input.js
rename to packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/class-decorators/input.mjs
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/class-decorators/output.js b/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/class-decorators/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/class-decorators/output.js
rename to packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/class-decorators/output.mjs
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/method-decorators/input.js b/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/method-decorators/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/method-decorators/input.js
rename to packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/method-decorators/input.mjs
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/method-decorators/output.js b/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/method-decorators/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/method-decorators/output.js
rename to packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/method-decorators/output.mjs
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/no-decorators/input.js b/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/no-decorators/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/no-decorators/input.js
rename to packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/no-decorators/input.mjs
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/no-decorators/output.js b/packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/no-decorators/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/no-decorators/output.js
rename to packages/babel-plugin-proposal-decorators/test/fixtures/decl-to-expression/no-decorators/output.mjs
diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/regression/7030/output.js b/packages/babel-plugin-proposal-decorators/test/fixtures/regression/7030/output.js
index b47a62b382feb..c21f2cdab1528 100644
--- a/packages/babel-plugin-proposal-decorators/test/fixtures/regression/7030/output.js
+++ b/packages/babel-plugin-proposal-decorators/test/fixtures/regression/7030/output.js
@@ -4,7 +4,9 @@ function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterat
 
 function _classCallCheck(instance, Constructor) { if (!_instanceof(instance, Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+
+function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
 function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
 
diff --git a/packages/babel-plugin-proposal-do-expressions/README.md b/packages/babel-plugin-proposal-do-expressions/README.md
index cc5c3aabc84c4..177c9dc22e42f 100644
--- a/packages/babel-plugin-proposal-do-expressions/README.md
+++ b/packages/babel-plugin-proposal-do-expressions/README.md
@@ -113,6 +113,6 @@ require("@babel/core").transform("code", {
 ```
 
 ## References
-- [Proposal](http://wiki.ecmascript.org/doku.php?id=strawman:do_expressions)
+- [Proposal](https://github.com/tc39/proposal-do-expressions)
 - [You Don't Know JS](https://github.com/getify/You-Dont-Know-JS/blob/master/types%20%26%20grammar/ch5.md#statement-completion-values)
 - Very handy for conditions inside JSX: [reactjs/react-future#35](https://github.com/reactjs/react-future/issues/35#issuecomment-120009203)
diff --git a/packages/babel-plugin-proposal-do-expressions/package.json b/packages/babel-plugin-proposal-do-expressions/package.json
index 0a14c10866c6e..60d83441a2648 100644
--- a/packages/babel-plugin-proposal-do-expressions/package.json
+++ b/packages/babel-plugin-proposal-do-expressions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-do-expressions",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile do expressions to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-do-expressions",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-do-expressions": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-do-expressions": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-do-expressions/src/index.js b/packages/babel-plugin-proposal-do-expressions/src/index.js
index 731ddbb22ad2b..b9e8d6180ab95 100644
--- a/packages/babel-plugin-proposal-do-expressions/src/index.js
+++ b/packages/babel-plugin-proposal-do-expressions/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxDoExpressions from "@babel/plugin-syntax-do-expressions";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     inherits: syntaxDoExpressions,
 
@@ -17,4 +20,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-export-default-from/package.json b/packages/babel-plugin-proposal-export-default-from/package.json
index ad1b8ab112101..51a40c332ab74 100644
--- a/packages/babel-plugin-proposal-export-default-from/package.json
+++ b/packages/babel-plugin-proposal-export-default-from/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-export-default-from",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile export default to ES2015",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-export-default-from",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-export-default-from": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-export-default-from": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-export-default-from/src/index.js b/packages/babel-plugin-proposal-export-default-from/src/index.js
index c5c226f80bd11..204bdaa2e431b 100644
--- a/packages/babel-plugin-proposal-export-default-from/src/index.js
+++ b/packages/babel-plugin-proposal-export-default-from/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxExportDefaultFrom from "@babel/plugin-syntax-export-default-from";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     inherits: syntaxExportDefaultFrom,
 
@@ -33,4 +36,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-compound-es6/input.js b/packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-compound-es6/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-compound-es6/input.js
rename to packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-compound-es6/input.mjs
diff --git a/packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-compound-es6/output.js b/packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-compound-es6/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-compound-es6/output.js
rename to packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-compound-es6/output.mjs
diff --git a/packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-es6/input.js b/packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-es6/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-es6/input.js
rename to packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-es6/input.mjs
diff --git a/packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-es6/output.js b/packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-es6/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-es6/output.js
rename to packages/babel-plugin-proposal-export-default-from/test/fixtures/export-default/default-es6/output.mjs
diff --git a/packages/babel-plugin-proposal-export-namespace-from/package.json b/packages/babel-plugin-proposal-export-namespace-from/package.json
index 3b8dc633d2d69..f1c055bab8389 100644
--- a/packages/babel-plugin-proposal-export-namespace-from/package.json
+++ b/packages/babel-plugin-proposal-export-namespace-from/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-export-namespace-from",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile export namespace to ES2015",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-export-namespace-from",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-export-namespace-from": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-export-namespace-from": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-export-namespace-from/src/index.js b/packages/babel-plugin-proposal-export-namespace-from/src/index.js
index ec07791bebb19..3d9e4f48126b0 100644
--- a/packages/babel-plugin-proposal-export-namespace-from/src/index.js
+++ b/packages/babel-plugin-proposal-export-namespace-from/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxExportNamespaceFrom from "@babel/plugin-syntax-export-namespace-from";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     inherits: syntaxExportNamespaceFrom,
 
@@ -43,4 +46,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-compound-es6/input.js b/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-compound-es6/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-compound-es6/input.js
rename to packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-compound-es6/input.mjs
diff --git a/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-compound-es6/output.js b/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-compound-es6/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-compound-es6/output.js
rename to packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-compound-es6/output.mjs
diff --git a/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-default/input.js b/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-default/input.js
rename to packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-default/input.mjs
diff --git a/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-default/output.js b/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-default/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-default/output.js
rename to packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-default/output.mjs
diff --git a/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-es6/input.js b/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-es6/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-es6/input.js
rename to packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-es6/input.mjs
diff --git a/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-es6/output.js b/packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-es6/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-es6/output.js
rename to packages/babel-plugin-proposal-export-namespace-from/test/fixtures/export-namespace/namespace-es6/output.mjs
diff --git a/packages/babel-plugin-proposal-function-bind/package.json b/packages/babel-plugin-proposal-function-bind/package.json
index a85836d6a5d6f..7fdd8cec7422d 100644
--- a/packages/babel-plugin-proposal-function-bind/package.json
+++ b/packages/babel-plugin-proposal-function-bind/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-function-bind",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile function bind operator to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-function-bind",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-function-bind": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-function-bind": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-function-bind/src/index.js b/packages/babel-plugin-proposal-function-bind/src/index.js
index ca9939d039d0b..57a6a759e3503 100644
--- a/packages/babel-plugin-proposal-function-bind/src/index.js
+++ b/packages/babel-plugin-proposal-function-bind/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxFunctionBind from "@babel/plugin-syntax-function-bind";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   function getTempId(scope) {
     let id = scope.path.getData("functionBind");
     if (id) return id;
@@ -60,4 +63,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-function-bind/test/fixtures/function-bind/complex-call/input.js b/packages/babel-plugin-proposal-function-bind/test/fixtures/function-bind/complex-call/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-function-bind/test/fixtures/function-bind/complex-call/input.js
rename to packages/babel-plugin-proposal-function-bind/test/fixtures/function-bind/complex-call/input.mjs
diff --git a/packages/babel-plugin-proposal-function-bind/test/fixtures/function-bind/complex-call/output.js b/packages/babel-plugin-proposal-function-bind/test/fixtures/function-bind/complex-call/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-function-bind/test/fixtures/function-bind/complex-call/output.js
rename to packages/babel-plugin-proposal-function-bind/test/fixtures/function-bind/complex-call/output.mjs
diff --git a/packages/babel-plugin-proposal-function-bind/test/fixtures/regression/6458/input.js b/packages/babel-plugin-proposal-function-bind/test/fixtures/regression/6458/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-function-bind/test/fixtures/regression/6458/input.js
rename to packages/babel-plugin-proposal-function-bind/test/fixtures/regression/6458/input.mjs
diff --git a/packages/babel-plugin-proposal-function-sent/package.json b/packages/babel-plugin-proposal-function-sent/package.json
index ed80377e06c67..96ade28156593 100644
--- a/packages/babel-plugin-proposal-function-sent/package.json
+++ b/packages/babel-plugin-proposal-function-sent/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-function-sent",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile the function.sent meta propety to valid ES2015 code",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-function-sent",
   "license": "MIT",
@@ -9,14 +9,15 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-wrap-function": "7.0.0-beta.39",
-    "@babel/plugin-syntax-function-sent": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/helper-wrap-function": "7.0.0-beta.42",
+    "@babel/plugin-syntax-function-sent": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-function-sent/src/index.js b/packages/babel-plugin-proposal-function-sent/src/index.js
index 008f8dc88fc61..16237e0ac40c2 100644
--- a/packages/babel-plugin-proposal-function-sent/src/index.js
+++ b/packages/babel-plugin-proposal-function-sent/src/index.js
@@ -1,8 +1,11 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxFunctionSent from "@babel/plugin-syntax-function-sent";
 import wrapFunction from "@babel/helper-wrap-function";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   const isFunctionSent = node =>
     t.isIdentifier(node.meta, { name: "function" }) &&
     t.isIdentifier(node.property, { name: "sent" });
@@ -57,4 +60,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-anonymous/input.js b/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-anonymous/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-anonymous/input.js
rename to packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-anonymous/input.mjs
diff --git a/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-anonymous/output.js b/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-anonymous/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-anonymous/output.js
rename to packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-anonymous/output.mjs
diff --git a/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-named/input.js b/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-named/input.js
rename to packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-named/input.mjs
diff --git a/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-named/output.js b/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-named/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-named/output.js
rename to packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export-default-named/output.mjs
diff --git a/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export/input.js b/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export/input.js
rename to packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export/input.mjs
diff --git a/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export/output.js b/packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export/output.js
rename to packages/babel-plugin-proposal-function-sent/test/fixtures/generator-kinds/export/output.mjs
diff --git a/packages/babel-plugin-proposal-logical-assignment-operators/.npmignore b/packages/babel-plugin-proposal-logical-assignment-operators/.npmignore
new file mode 100644
index 0000000000000..f9806945836eb
--- /dev/null
+++ b/packages/babel-plugin-proposal-logical-assignment-operators/.npmignore
@@ -0,0 +1,3 @@
+src
+test
+*.log
diff --git a/packages/babel-plugin-proposal-logical-assignment-operators/README.md b/packages/babel-plugin-proposal-logical-assignment-operators/README.md
new file mode 100644
index 0000000000000..26fbaddfb7742
--- /dev/null
+++ b/packages/babel-plugin-proposal-logical-assignment-operators/README.md
@@ -0,0 +1,63 @@
+# @babel/plugin-proposal-logical-assignment-operator
+
+> Transforms logical assignment operators into short-circuited assignments
+
+## Example
+
+**In**
+
+```javascript
+a ||= b;
+obj.a.b ||= c;
+
+a &&= b;
+obj.a.b &&= c;
+```
+
+**Out**
+
+```javascript
+var _obj$a, _obj$a2;
+
+a || (a = b);
+(_obj$a = obj.a).b || (_obj$a.b = c);
+
+a && (a = b);
+(_obj$a2 = obj.a).b && (_obj$a2.b = c);
+```
+
+## Installation
+
+```sh
+npm install --save-dev @babel/plugin-proposal-logical-assignment-operators
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "plugins": ["@babel/plugin-proposal-logical-assignment-operators"]
+}
+```
+
+### Via CLI
+
+```sh
+babel --plugins @babel/plugin-proposal-logical-assignment-operators script.js
+```
+
+### Via Node API
+
+```javascript
+require("@babel/core").transform("code", {
+  plugins: ["@babel/plugin-proposal-logical-assignment-operators"]
+});
+```
+
+## References
+
+* [Proposal: Logical Assignment Operators](https://github.com/jridgewell/proposal-logical-assignment-operators)
diff --git a/packages/babel-plugin-proposal-logical-assignment-operators/package.json b/packages/babel-plugin-proposal-logical-assignment-operators/package.json
new file mode 100644
index 0000000000000..d1547eb140dd7
--- /dev/null
+++ b/packages/babel-plugin-proposal-logical-assignment-operators/package.json
@@ -0,0 +1,22 @@
+{
+  "name": "@babel/plugin-proposal-logical-assignment-operators",
+  "version": "7.0.0-beta.42",
+  "description": "Transforms logical assignment operators into short-circuited assignments",
+  "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-logical-assignment-operators",
+  "license": "MIT",
+  "main": "lib",
+  "keywords": [
+    "babel-plugin"
+  ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-logical-assignment-operators": "7.0.0-beta.42"
+  },
+  "peerDependencies": {
+    "@babel/core": "7.0.0-beta.42"
+  },
+  "devDependencies": {
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
+  }
+}
diff --git a/packages/babel-plugin-proposal-logical-assignment-operators/src/index.js b/packages/babel-plugin-proposal-logical-assignment-operators/src/index.js
new file mode 100644
index 0000000000000..8c3c2e15f020f
--- /dev/null
+++ b/packages/babel-plugin-proposal-logical-assignment-operators/src/index.js
@@ -0,0 +1,45 @@
+import { declare } from "@babel/helper-plugin-utils";
+import syntaxLogicalAssignmentOperators from "@babel/plugin-syntax-logical-assignment-operators";
+import { types as t } from "@babel/core";
+
+export default declare(api => {
+  api.assertVersion(7);
+
+  return {
+    inherits: syntaxLogicalAssignmentOperators,
+
+    visitor: {
+      AssignmentExpression(path) {
+        const { node, scope } = path;
+        const { operator, left, right } = node;
+        if (operator !== "||=" && operator !== "&&=") {
+          return;
+        }
+
+        let ref;
+        if (t.isMemberExpression(left)) {
+          const { object } = left;
+          const memo = scope.maybeGenerateMemoised(object);
+          if (memo) {
+            path
+              .get("left.object")
+              .replaceWith(
+                t.assignmentExpression("=", t.cloneNode(memo), object),
+              );
+
+            ref = t.cloneNode(left);
+            ref.object = t.cloneNode(memo);
+          }
+        }
+
+        path.replaceWith(
+          t.logicalExpression(
+            operator.slice(0, -1),
+            left,
+            t.assignmentExpression("=", ref || t.cloneNode(left), right),
+          ),
+        );
+      },
+    },
+  };
+});
diff --git a/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/exec.js b/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/exec.js
new file mode 100644
index 0000000000000..57865464cd716
--- /dev/null
+++ b/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/exec.js
@@ -0,0 +1,40 @@
+var x = 0;
+var sets = 0;
+var obj = {
+  get x() {
+    return x;
+  },
+
+  set x(value) {
+    sets++;
+    x = value;
+  },
+};
+
+assert.equal(obj.x ||= 1, 1);
+assert.equal(sets, 1);
+assert.equal(obj.x ||= 2, 1);
+assert.equal(sets, 1);
+
+assert.equal(obj.x &&= 0, 0);
+assert.equal(sets, 2);
+assert.equal(obj.x &&= 3, 0);
+assert.equal(sets, 2);
+
+var gets = 0;
+var deep = {
+  get obj() {
+    gets++;
+    return obj;
+  },
+};
+
+assert.equal(deep.obj.x ||= 1, 1);
+assert.equal(gets, 1);
+assert.equal(deep.obj.x ||= 2, 1);
+assert.equal(gets, 2);
+
+assert.equal(deep.obj.x &&= 0, 0);
+assert.equal(gets, 3);
+assert.equal(deep.obj.x &&= 3, 0);
+assert.equal(gets, 4);
diff --git a/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/input.js b/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/input.js
new file mode 100644
index 0000000000000..57865464cd716
--- /dev/null
+++ b/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/input.js
@@ -0,0 +1,40 @@
+var x = 0;
+var sets = 0;
+var obj = {
+  get x() {
+    return x;
+  },
+
+  set x(value) {
+    sets++;
+    x = value;
+  },
+};
+
+assert.equal(obj.x ||= 1, 1);
+assert.equal(sets, 1);
+assert.equal(obj.x ||= 2, 1);
+assert.equal(sets, 1);
+
+assert.equal(obj.x &&= 0, 0);
+assert.equal(sets, 2);
+assert.equal(obj.x &&= 3, 0);
+assert.equal(sets, 2);
+
+var gets = 0;
+var deep = {
+  get obj() {
+    gets++;
+    return obj;
+  },
+};
+
+assert.equal(deep.obj.x ||= 1, 1);
+assert.equal(gets, 1);
+assert.equal(deep.obj.x ||= 2, 1);
+assert.equal(gets, 2);
+
+assert.equal(deep.obj.x &&= 0, 0);
+assert.equal(gets, 3);
+assert.equal(deep.obj.x &&= 3, 0);
+assert.equal(gets, 4);
diff --git a/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/options.json b/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/options.json
new file mode 100644
index 0000000000000..259c77d8e49cf
--- /dev/null
+++ b/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["proposal-logical-assignment-operators"]
+}
diff --git a/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/output.js b/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/output.js
new file mode 100644
index 0000000000000..fb5c9b38b482f
--- /dev/null
+++ b/packages/babel-plugin-proposal-logical-assignment-operators/test/fixtures/logical-assignment/general-semantics/output.js
@@ -0,0 +1,39 @@
+var _deep$obj, _deep$obj2, _deep$obj3, _deep$obj4;
+
+var x = 0;
+var sets = 0;
+var obj = {
+  get x() {
+    return x;
+  },
+
+  set x(value) {
+    sets++;
+    x = value;
+  }
+
+};
+assert.equal(obj.x || (obj.x = 1), 1);
+assert.equal(sets, 1);
+assert.equal(obj.x || (obj.x = 2), 1);
+assert.equal(sets, 1);
+assert.equal(obj.x && (obj.x = 0), 0);
+assert.equal(sets, 2);
+assert.equal(obj.x && (obj.x = 3), 0);
+assert.equal(sets, 2);
+var gets = 0;
+var deep = {
+  get obj() {
+    gets++;
+    return obj;
+  }
+
+};
+assert.equal((_deep$obj = deep.obj).x || (_deep$obj.x = 1), 1);
+assert.equal(gets, 1);
+assert.equal((_deep$obj2 = deep.obj).x || (_deep$obj2.x = 2), 1);
+assert.equal(gets, 2);
+assert.equal((_deep$obj3 = deep.obj).x && (_deep$obj3.x = 0), 0);
+assert.equal(gets, 3);
+assert.equal((_deep$obj4 = deep.obj).x && (_deep$obj4.x = 3), 0);
+assert.equal(gets, 4);
diff --git a/packages/babel-plugin-proposal-logical-assignment-operators/test/index.js b/packages/babel-plugin-proposal-logical-assignment-operators/test/index.js
new file mode 100644
index 0000000000000..1b534b8fc64af
--- /dev/null
+++ b/packages/babel-plugin-proposal-logical-assignment-operators/test/index.js
@@ -0,0 +1,3 @@
+import runner from "@babel/helper-plugin-test-runner";
+
+runner(__dirname);
diff --git a/packages/babel-plugin-proposal-nullish-coalescing-operator/README.md b/packages/babel-plugin-proposal-nullish-coalescing-operator/README.md
index d433354f269b2..2b01b5f2a864f 100644
--- a/packages/babel-plugin-proposal-nullish-coalescing-operator/README.md
+++ b/packages/babel-plugin-proposal-nullish-coalescing-operator/README.md
@@ -60,7 +60,7 @@ require("@babel/core").transform("code", {
 `boolean`, defaults to `false`.
 
 When `true`, this transform will pretend `document.all` does not exist,
-and perform loose equality checks with `null` instead of string equality checks
+and perform loose equality checks with `null` instead of strict equality checks
 against both `null` and `undefined`.
 
 #### Example
diff --git a/packages/babel-plugin-proposal-nullish-coalescing-operator/package.json b/packages/babel-plugin-proposal-nullish-coalescing-operator/package.json
index 383ce8994cc0b..ceeb90295f8ea 100644
--- a/packages/babel-plugin-proposal-nullish-coalescing-operator/package.json
+++ b/packages/babel-plugin-proposal-nullish-coalescing-operator/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-nullish-coalescing-operator",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Remove nullish coalescing operator",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-nullish-coalescing-opearator",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-nullish-coalescing-operator": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-nullish-coalescing-operator": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-nullish-coalescing-operator/src/index.js b/packages/babel-plugin-proposal-nullish-coalescing-operator/src/index.js
index b9469081af355..454b4c057a8c7 100644
--- a/packages/babel-plugin-proposal-nullish-coalescing-operator/src/index.js
+++ b/packages/babel-plugin-proposal-nullish-coalescing-operator/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxNullishCoalescingOperator from "@babel/plugin-syntax-nullish-coalescing-operator";
 import { types as t } from "@babel/core";
 
-export default function(api, { loose = false }) {
+export default declare((api, { loose = false }) => {
+  api.assertVersion(7);
+
   return {
     inherits: syntaxNullishCoalescingOperator,
 
@@ -43,4 +46,4 @@ export default function(api, { loose = false }) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-numeric-separator/package.json b/packages/babel-plugin-proposal-numeric-separator/package.json
index a386ac4fd28e4..1ce1d3b838d50 100644
--- a/packages/babel-plugin-proposal-numeric-separator/package.json
+++ b/packages/babel-plugin-proposal-numeric-separator/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-numeric-separator",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Remove numeric separators from Decimal, Binary, Hex and Octal literals",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-numeric-separator",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-numeric-separator": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-numeric-separator": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-numeric-separator/src/index.js b/packages/babel-plugin-proposal-numeric-separator/src/index.js
index d81cc3f98f885..822ade1b8c4de 100644
--- a/packages/babel-plugin-proposal-numeric-separator/src/index.js
+++ b/packages/babel-plugin-proposal-numeric-separator/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxNumericSeparator from "@babel/plugin-syntax-numeric-separator";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   function replaceNumberArg({ node }) {
     if (node.callee.name !== "Number") {
       return;
@@ -29,4 +32,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-object-rest-spread/README.md b/packages/babel-plugin-proposal-object-rest-spread/README.md
index f5beaa4df9819..9c1b785b94bcb 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/README.md
+++ b/packages/babel-plugin-proposal-object-rest-spread/README.md
@@ -54,18 +54,33 @@ require("@babel/core").transform("code", {
 
 ## Options
 
+By default, this plugin will produce spec compliant code by using Babel's `objectSpread` helper.
+
+### `loose`
+
+`boolean`, defaults to `false`.
+
+Enabling this option will use Babel's `extends` helper, which is basically the same as `Object.assign` (see `useBuiltIns` below to use it directly).
+
+:warning: Please keep in mind that even if they're almost equivalent, there's an important difference between spread and `Object.assign`: **spread _defines_ new properties, while `Object.assign()` _sets_ them**, so using this mode might produce unexpected results in some cases.
+
+For detailed information please check out [Spread VS. Object.assign](http://2ality.com/2016/10/rest-spread-properties.html#spreading-objects-versus-objectassign) and [Assigning VS. defining properties](http://exploringjs.com/es6/ch_oop-besides-classes.html#sec_assigning-vs-defining-properties).
+
+
 ### `useBuiltIns`
 
 `boolean`, defaults to `false`.
 
-By default, this plugin uses Babel's `extends` helper which polyfills `Object.assign`. Enabling this option will use `Object.assign` directly.
+Enabling this option will use `Object.assign` directly instead of the Babel's `extends` helper. 
+
+##### Example
 
 **.babelrc**
 
 ```json
 {
   "plugins": [
-    ["@babel/plugin-proposal-object-rest-spread", { "useBuiltIns": true }]
+    ["@babel/plugin-proposal-object-rest-spread", { "loose": true, "useBuiltIns": true }]
   ]
 }
 ```
@@ -86,3 +101,5 @@ z = Object.assign({ x }, y);
 
 * [Proposal: Object Rest/Spread Properties for ECMAScript](https://github.com/sebmarkbage/ecmascript-rest-spread)
 * [Spec](http://sebmarkbage.github.io/ecmascript-rest-spread)
+* [Spread VS. Object.assign](http://2ality.com/2016/10/rest-spread-properties.html#spreading-objects-versus-objectassign)
+* [Assigning VS. defining properties](http://exploringjs.com/es6/ch_oop-besides-classes.html#sec_assigning-vs-defining-properties)
diff --git a/packages/babel-plugin-proposal-object-rest-spread/package.json b/packages/babel-plugin-proposal-object-rest-spread/package.json
index 49a5e00e20c7c..07bffb5b3b6ef 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/package.json
+++ b/packages/babel-plugin-proposal-object-rest-spread/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-object-rest-spread",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile object rest and spread to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-object-rest-spread",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-object-rest-spread/src/index.js b/packages/babel-plugin-proposal-object-rest-spread/src/index.js
index 7b9d854555fe1..d43a5a7b11d6f 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/src/index.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/src/index.js
@@ -1,21 +1,46 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxObjectRestSpread from "@babel/plugin-syntax-object-rest-spread";
 import { types as t } from "@babel/core";
 
-export default function(api, opts) {
-  const { useBuiltIns = false } = opts;
-  if (typeof useBuiltIns !== "boolean") {
-    throw new Error(".useBuiltIns must be a boolean, or undefined");
+export default declare((api, opts) => {
+  api.assertVersion(7);
+
+  const { useBuiltIns = false, loose = false } = opts;
+
+  if (typeof loose !== "boolean") {
+    throw new Error(".loose must be a boolean, or undefined");
+  }
+
+  function getExtendsHelper(file) {
+    return useBuiltIns
+      ? t.memberExpression(t.identifier("Object"), t.identifier("assign"))
+      : file.addHelper("extends");
   }
 
   function hasRestElement(path) {
     let foundRestElement = false;
+    visitRestElements(path, () => {
+      foundRestElement = true;
+      path.stop();
+    });
+    return foundRestElement;
+  }
+
+  function visitRestElements(path, visitor) {
     path.traverse({
-      RestElement() {
-        foundRestElement = true;
-        path.stop();
+      Expression(path) {
+        const parentType = path.parent.type;
+        if (
+          (parentType == "AssignmentPattern" && path.key === "right") ||
+          (parentType == "ObjectProperty" &&
+            path.parent.computed &&
+            path.key === "key")
+        ) {
+          path.skip();
+        }
       },
+      RestElement: visitor,
     });
-    return foundRestElement;
   }
 
   function hasSpread(node) {
@@ -78,6 +103,17 @@ export default function(api, opts) {
     const impureComputedPropertyDeclarators = replaceImpureComputedKeys(path);
     const { keys, allLiteral } = extractNormalizedKeys(path);
 
+    if (keys.length === 0) {
+      return [
+        impureComputedPropertyDeclarators,
+        restElement.argument,
+        t.callExpression(getExtendsHelper(file), [
+          t.objectExpression([]),
+          t.cloneNode(objRef),
+        ]),
+      ];
+    }
+
     let keyExpression;
     if (!allLiteral) {
       // map to toPropertyKey to handle the possible non-string values
@@ -146,108 +182,102 @@ export default function(api, opts) {
         }
 
         let insertionPath = path;
+        const originalPath = path;
+
+        visitRestElements(path.get("id"), path => {
+          if (!path.parentPath.isObjectPattern()) {
+            // Return early if the parent is not an ObjectPattern, but
+            // (for example) an ArrayPattern or Function, because that
+            // means this RestElement is an not an object property.
+            return;
+          }
 
-        path.get("id").traverse(
-          {
-            RestElement(path) {
-              if (!path.parentPath.isObjectPattern()) {
-                // Return early if the parent is not an ObjectPattern, but
-                // (for example) an ArrayPattern or Function, because that
-                // means this RestElement is an not an object property.
-                return;
-              }
-
-              if (
-                // skip single-property case, e.g.
-                // const { ...x } = foo();
-                // since the RHS will not be duplicated
-                this.originalPath.node.id.properties.length > 1 &&
-                !t.isIdentifier(this.originalPath.node.init)
-              ) {
-                // const { a, ...b } = foo();
-                // to avoid calling foo() twice, as a first step convert it to:
-                // const _foo = foo(),
-                //       { a, ...b } = _foo;
-                const initRef = path.scope.generateUidIdentifierBasedOnNode(
-                  this.originalPath.node.init,
-                  "ref",
-                );
-                // insert _foo = foo()
-                this.originalPath.insertBefore(
-                  t.variableDeclarator(initRef, this.originalPath.node.init),
-                );
-                // replace foo() with _foo
-                this.originalPath.replaceWith(
-                  t.variableDeclarator(
-                    this.originalPath.node.id,
-                    t.cloneNode(initRef),
-                  ),
-                );
-
-                return;
-              }
-
-              let ref = this.originalPath.node.init;
-              const refPropertyPath = [];
-              let kind;
-
-              path.findParent(path => {
-                if (path.isObjectProperty()) {
-                  refPropertyPath.unshift(path.node.key.name);
-                } else if (path.isVariableDeclarator()) {
-                  kind = path.parentPath.node.kind;
-                  return true;
-                }
-              });
-
-              if (refPropertyPath.length) {
-                refPropertyPath.forEach(prop => {
-                  ref = t.memberExpression(ref, t.identifier(prop));
-                });
-              }
-
-              const objectPatternPath = path.findParent(path =>
-                path.isObjectPattern(),
-              );
-              const [
-                impureComputedPropertyDeclarators,
-                argument,
-                callExpression,
-              ] = createObjectSpread(objectPatternPath, file, ref);
-
-              t.assertIdentifier(argument);
-
-              insertionPath.insertBefore(impureComputedPropertyDeclarators);
-
-              insertionPath.insertAfter(
-                t.variableDeclarator(argument, callExpression),
-              );
-
-              insertionPath = insertionPath.getSibling(insertionPath.key + 1);
-
-              path.scope.registerBinding(kind, insertionPath);
-
-              if (objectPatternPath.node.properties.length === 0) {
-                objectPatternPath
-                  .findParent(
-                    path =>
-                      path.isObjectProperty() || path.isVariableDeclarator(),
-                  )
-                  .remove();
-              }
-            },
-          },
-          {
-            originalPath: path,
-          },
-        );
+          if (
+            // skip single-property case, e.g.
+            // const { ...x } = foo();
+            // since the RHS will not be duplicated
+            originalPath.node.id.properties.length > 1 &&
+            !t.isIdentifier(originalPath.node.init)
+          ) {
+            // const { a, ...b } = foo();
+            // to avoid calling foo() twice, as a first step convert it to:
+            // const _foo = foo(),
+            //       { a, ...b } = _foo;
+            const initRef = path.scope.generateUidIdentifierBasedOnNode(
+              originalPath.node.init,
+              "ref",
+            );
+            // insert _foo = foo()
+            originalPath.insertBefore(
+              t.variableDeclarator(initRef, originalPath.node.init),
+            );
+            // replace foo() with _foo
+            originalPath.replaceWith(
+              t.variableDeclarator(originalPath.node.id, t.cloneNode(initRef)),
+            );
+
+            return;
+          }
+
+          let ref = originalPath.node.init;
+          const refPropertyPath = [];
+          let kind;
+
+          path.findParent(path => {
+            if (path.isObjectProperty()) {
+              refPropertyPath.unshift(path.node.key.name);
+            } else if (path.isVariableDeclarator()) {
+              kind = path.parentPath.node.kind;
+              return true;
+            }
+          });
+
+          if (refPropertyPath.length) {
+            refPropertyPath.forEach(prop => {
+              ref = t.memberExpression(ref, t.identifier(prop));
+            });
+          }
+
+          const objectPatternPath = path.findParent(path =>
+            path.isObjectPattern(),
+          );
+          const [
+            impureComputedPropertyDeclarators,
+            argument,
+            callExpression,
+          ] = createObjectSpread(objectPatternPath, file, ref);
+
+          t.assertIdentifier(argument);
+
+          insertionPath.insertBefore(impureComputedPropertyDeclarators);
+
+          insertionPath.insertAfter(
+            t.variableDeclarator(argument, callExpression),
+          );
+
+          insertionPath = insertionPath.getSibling(insertionPath.key + 1);
+
+          path.scope.registerBinding(kind, insertionPath);
+
+          if (objectPatternPath.node.properties.length === 0) {
+            objectPatternPath
+              .findParent(
+                path => path.isObjectProperty() || path.isVariableDeclarator(),
+              )
+              .remove();
+          }
+        });
       },
       // taken from transform-destructuring/src/index.js#visitor
       // export var { a, ...b } = c;
       ExportNamedDeclaration(path) {
         const declaration = path.get("declaration");
         if (!declaration.isVariableDeclaration()) return;
-        if (!hasRestElement(declaration)) return;
+
+        const hasRest = declaration
+          .get("declarations")
+          .some(path => hasRestElement(path.get("id")));
+        if (!hasRest) return;
 
         const specifiers = [];
 
@@ -366,6 +396,10 @@ export default function(api, opts) {
           props = [];
         }
 
+        if (t.isSpreadElement(path.node.properties[0])) {
+          args.push(t.objectExpression([]));
+        }
+
         for (const prop of (path.node.properties: Array)) {
           if (t.isSpreadElement(prop)) {
             push();
@@ -377,16 +411,15 @@ export default function(api, opts) {
 
         push();
 
-        if (!t.isObjectExpression(args[0])) {
-          args.unshift(t.objectExpression([]));
+        let helper;
+        if (loose) {
+          helper = getExtendsHelper(file);
+        } else {
+          helper = file.addHelper("objectSpread");
         }
 
-        const helper = useBuiltIns
-          ? t.memberExpression(t.identifier("Object"), t.identifier("assign"))
-          : file.addHelper("extends");
-
         path.replaceWith(t.callExpression(helper, args));
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/catch-clause/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/catch-clause/output.js
index bf49f3ad4e9bd..3d2528632ed1b 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/catch-clause/output.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/catch-clause/output.js
@@ -1,5 +1,5 @@
 try {} catch (_ref) {
-  let a34 = babelHelpers.objectWithoutProperties(_ref, []);
+  let a34 = babelHelpers.extends({}, _ref);
 }
 
 try {} catch (_ref2) {
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/duplicate-decl-bug/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/duplicate-decl-bug/output.js
index 87abb8f817a16..0be57aba8d68e 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/duplicate-decl-bug/output.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/duplicate-decl-bug/output.js
@@ -3,5 +3,5 @@ it("es7.objectRestSpread", () => {
     a: 1,
     b: 2
   };
-  let copy = babelHelpers.objectWithoutProperties(original, []);
+  let copy = babelHelpers.extends({}, original);
 });
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/export/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/export/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/export/input.js
rename to packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/export/input.mjs
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/export/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/export/output.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/export/output.js
rename to packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/export/output.mjs
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-computed-key/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-computed-key/input.js
new file mode 100644
index 0000000000000..74d87a14954b5
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-computed-key/input.js
@@ -0,0 +1,6 @@
+const {
+  [({ ...rest }) => {
+    let { ...b } = {};
+  }]: a,
+  [({ ...d } = {})]: c,
+} = {};
\ No newline at end of file
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-computed-key/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-computed-key/output.js
new file mode 100644
index 0000000000000..fd457cfdc6636
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-computed-key/output.js
@@ -0,0 +1,9 @@
+var _ref2;
+
+const {
+  [(_ref) => {
+    let rest = babelHelpers.extends({}, _ref);
+    let b = babelHelpers.extends({}, {});
+  }]: a,
+  [(_ref2 = {}, ({} = _ref2), d = babelHelpers.extends({}, _ref2), _ref2)]: c
+} = {};
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-default-value/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-default-value/input.js
new file mode 100644
index 0000000000000..7537d685b3d87
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-default-value/input.js
@@ -0,0 +1,6 @@
+const {
+  a = ({ ...rest }) => {
+    let { ...b } = {};
+  },
+  c = ({ ...d } = {}),
+} = {};
\ No newline at end of file
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-default-value/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-default-value/output.js
new file mode 100644
index 0000000000000..f1ad422c4de08
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-default-value/output.js
@@ -0,0 +1,9 @@
+var _ref2;
+
+const {
+  a = (_ref) => {
+    let rest = babelHelpers.extends({}, _ref);
+    let b = babelHelpers.extends({}, {});
+  },
+  c = (_ref2 = {}, ({} = _ref2), d = babelHelpers.extends({}, _ref2), _ref2)
+} = {};
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-order/exec.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-order/exec.js
new file mode 100644
index 0000000000000..bdccb5b708b40
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-order/exec.js
@@ -0,0 +1,21 @@
+var result = "";
+
+var obj = {
+  get foo() {
+    result += "foo"
+  },
+  a: {
+    get bar() {
+      result += "bar";
+    }
+  },
+  b: {
+    get baz() {
+      result += "baz";
+    }
+  }
+};
+
+var { a: { ...bar }, b: { ...baz }, ...foo } = obj;
+
+assert.strictEqual(result, "barbazfoo");
\ No newline at end of file
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-order/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-order/input.js
new file mode 100644
index 0000000000000..76876286cd230
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-order/input.js
@@ -0,0 +1 @@
+const { a: { ...bar }, b: { ...baz }, ...foo } = obj;
\ No newline at end of file
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-order/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-order/output.js
new file mode 100644
index 0000000000000..f9973cfc45a59
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/nested-order/output.js
@@ -0,0 +1,3 @@
+const bar = babelHelpers.extends({}, obj.a),
+      baz = babelHelpers.extends({}, obj.b),
+      foo = babelHelpers.extends({}, obj);
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/parameters/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/parameters/output.js
index 39cbd5c047064..3fcf29325f962 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/parameters/output.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/parameters/output.js
@@ -1,5 +1,5 @@
 function a(_ref) {
-  let a34 = babelHelpers.objectWithoutProperties(_ref, []);
+  let a34 = babelHelpers.extends({}, _ref);
 }
 
 function a2(_ref2) {
@@ -57,7 +57,7 @@ function a7(_ref8 = {}) {
 }
 
 function a8([_ref9]) {
-  let a1 = babelHelpers.objectWithoutProperties(_ref9, []);
+  let a1 = babelHelpers.extends({}, _ref9);
 }
 
 function a9([_ref10]) {
@@ -68,7 +68,7 @@ function a9([_ref10]) {
 }
 
 function a10([a1, _ref11]) {
-  let a2 = babelHelpers.objectWithoutProperties(_ref11, []);
+  let a2 = babelHelpers.extends({}, _ref11);
 } // Unchanged
 
 
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/variable-destructuring/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/variable-destructuring/output.js
index 0bebdd2fa2248..6772f31baf398 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/variable-destructuring/output.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-rest/variable-destructuring/output.js
@@ -1,10 +1,10 @@
 var z = {};
-var x = babelHelpers.objectWithoutProperties(z, []);
-var a = babelHelpers.objectWithoutProperties({
+var x = babelHelpers.extends({}, z);
+var a = babelHelpers.extends({}, {
   a: 1
-}, []);
-var x = babelHelpers.objectWithoutProperties(a.b, []);
-var x = babelHelpers.objectWithoutProperties(a(), []);
+});
+var x = babelHelpers.extends({}, a.b);
+var x = babelHelpers.extends({}, a());
 var {
   x1
 } = z,
@@ -36,7 +36,7 @@ let {
   }
 } = complex,
     asdf = babelHelpers.objectWithoutProperties(complex.x, ["a", d].map(babelHelpers.toPropertyKey)),
-    d = babelHelpers.objectWithoutProperties(complex.y, []),
+    d = babelHelpers.extends({}, complex.y),
     g = babelHelpers.objectWithoutProperties(complex, ["x"]);
 let {} = z,
-    y4 = babelHelpers.objectWithoutProperties(z.x4, []);
+    y4 = babelHelpers.extends({}, z.x4);
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/assignment/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/assignment/output.js
index b5926abf94ca9..33939f0e46221 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/assignment/output.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/assignment/output.js
@@ -1,9 +1,11 @@
-function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }
 
-z = _extends({
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+z = _objectSpread({
   x
 }, y);
 z = {
   x,
-  w: _extends({}, y)
+  w: _objectSpread({}, y)
 };
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/expression/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/expression/input.js
index e03ef8bdb2f54..2fd31d2ffdace 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/expression/input.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/expression/input.js
@@ -1 +1,7 @@
 ({ x, ...y, a, ...b, c });
+
+({ ...Object.prototype });
+
+({ ...{ foo: 'bar' } });
+
+({ ...{ get foo () { return 'foo' } } });
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/expression/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/expression/output.js
index 5d69448744d1f..11eb0dfa987d1 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/expression/output.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/expression/output.js
@@ -1,9 +1,24 @@
-function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }
 
-_extends({
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+_objectSpread({
   x
 }, y, {
   a
 }, b, {
   c
 });
+
+_objectSpread({}, Object.prototype);
+
+_objectSpread({}, {
+  foo: 'bar'
+});
+
+_objectSpread({}, {
+  get foo() {
+    return 'foo';
+  }
+
+});
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode-builtins/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode-builtins/input.js
new file mode 100644
index 0000000000000..6f0367fb7c701
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode-builtins/input.js
@@ -0,0 +1,3 @@
+z = { x, ...y };
+
+z = { x, w: { ...y } };
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode-builtins/options.json b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode-builtins/options.json
new file mode 100644
index 0000000000000..9adc9bd0890d2
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode-builtins/options.json
@@ -0,0 +1,5 @@
+{
+  "plugins": [
+    ["proposal-object-rest-spread", { "loose": true, "useBuiltIns": true }]
+  ]
+}
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode-builtins/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode-builtins/output.js
new file mode 100644
index 0000000000000..457fa6a6069d3
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode-builtins/output.js
@@ -0,0 +1,7 @@
+z = Object.assign({
+  x
+}, y);
+z = {
+  x,
+  w: Object.assign({}, y)
+};
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode/input.js
new file mode 100644
index 0000000000000..6f0367fb7c701
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode/input.js
@@ -0,0 +1,3 @@
+z = { x, ...y };
+
+z = { x, w: { ...y } };
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode/options.json b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode/options.json
new file mode 100644
index 0000000000000..7f3c40b6a6e8e
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode/options.json
@@ -0,0 +1,5 @@
+{
+  "plugins": [
+    ["proposal-object-rest-spread", { "loose": true }]
+  ]
+}
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode/output.js
new file mode 100644
index 0000000000000..b5926abf94ca9
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/loose-mode/output.js
@@ -0,0 +1,9 @@
+function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
+
+z = _extends({
+  x
+}, y);
+z = {
+  x,
+  w: _extends({}, y)
+};
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/no-object-assign-exec/exec.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/no-object-assign-exec/exec.js
new file mode 100644
index 0000000000000..c3115b2ba17d6
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/no-object-assign-exec/exec.js
@@ -0,0 +1,40 @@
+Object.defineProperty(Object.prototype, 'NOSET', {
+  set(value) {
+    // noop
+  },
+});
+
+Object.defineProperty(Object.prototype, 'NOWRITE', {
+  writable: false,
+  value: 'abc',
+});
+
+const obj = { NOSET: 123 };
+// this wouldn't work as expected if transformed as Object.assign (or equivalent)
+// because those trigger object setters (spread don't)
+const objSpread = { ...obj };
+
+const obj2 = { NOSET: 123, NOWRITE: 456 };
+// this line would throw `TypeError: Cannot assign to read only property 'NOWRITE'`
+// if transformed as Object.assign (or equivalent) because those use *assignment* for creating properties
+// (spread defines them)
+const obj2Spread = { ...obj2 };
+
+assert.deepEqual(obj, objSpread);
+assert.deepEqual(obj2, obj2Spread);
+
+const KEY = Symbol('key');
+const obj3Spread = { ...{ get foo () { return 'bar' } }, [KEY]: 'symbol' };
+assert.equal(Object.getOwnPropertyDescriptor(obj3Spread, 'foo').value, 'bar');
+assert.equal(Object.getOwnPropertyDescriptor(obj3Spread, KEY).value, 'symbol');
+
+const obj4Spread = { ...Object.prototype };
+assert.isUndefined(Object.getOwnPropertyDescriptor(obj4Spread, 'hasOwnProperty'));
+
+assert.doesNotThrow(() => ({ ...null, ...undefined }));
+
+const o = Object.create(null);
+o.a = 'foo';
+o.__proto__ = [];
+const o2 = { ...o };
+assert.equal(false, Array.isArray(Object.getPrototypeOf(o2)));
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/variable-declaration/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/variable-declaration/output.js
index 73be92643eb77..0bfa38715a446 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/variable-declaration/output.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/object-spread/variable-declaration/output.js
@@ -1,3 +1,5 @@
-function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }
 
-var z = _extends({}, x);
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+var z = _objectSpread({}, x);
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/T7178/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/T7178/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/T7178/input.js
rename to packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/T7178/input.mjs
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/T7178/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/T7178/output.js
index 328e6aaa237f7..356e9f948f372 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/T7178/output.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/T7178/output.js
@@ -5,6 +5,6 @@ var _props = babelHelpers.interopRequireDefault(require("props"));
 console.log(_props.default);
 
 (function () {
-  const props = babelHelpers.objectWithoutProperties(this.props, []);
+  const props = babelHelpers.extends({}, this.props);
   console.log(props);
 })();
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-5151/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-5151/output.js
index 1018162504987..23255c44a7898 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-5151/output.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-5151/output.js
@@ -3,7 +3,7 @@ const {
 } = a,
       y = babelHelpers.objectWithoutProperties(a, ["x"]),
       z = foo(y);
-const s = babelHelpers.objectWithoutProperties(r, []),
+const s = babelHelpers.extends({}, r),
       t = foo(s); // ordering is preserved
 
 var l = foo(),
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7304/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7304/input.mjs
similarity index 100%
rename from packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7304/input.js
rename to packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7304/input.mjs
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7304/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7304/output.js
index b0abfb9a44aa3..f162415e914eb 100644
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7304/output.js
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7304/output.js
@@ -7,7 +7,7 @@ exports.default = void 0;
 
 class _default {
   method(_ref) {
-    let object = babelHelpers.objectWithoutProperties(_ref, []);
+    let object = Object.assign({}, _ref);
   }
 
 }
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7388/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7388/input.js
new file mode 100644
index 0000000000000..a311921880c3a
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7388/input.js
@@ -0,0 +1,12 @@
+function fn0(obj0) {
+  const {
+    fn1 = (obj1 = {}) => {
+      const {
+        fn2 = (obj2 = {}) => {
+          const {a, ...rest} = obj2;
+          console.log(rest);
+        }
+      } = obj1;
+    }
+  } = obj0;
+}
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7388/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7388/output.js
new file mode 100644
index 0000000000000..97254741cbeab
--- /dev/null
+++ b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7388/output.js
@@ -0,0 +1,15 @@
+function fn0(obj0) {
+  const {
+    fn1 = (obj1 = {}) => {
+      const {
+        fn2 = (obj2 = {}) => {
+          const {
+            a
+          } = obj2,
+                rest = babelHelpers.objectWithoutProperties(obj2, ["a"]);
+          console.log(rest);
+        }
+      } = obj1;
+    }
+  } = obj0;
+}
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-invalid-option/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-invalid-option/input.js
deleted file mode 100644
index 8d610842d85f6..0000000000000
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-invalid-option/input.js
+++ /dev/null
@@ -1 +0,0 @@
-z = { x, ...y };
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-invalid-option/options.json b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-invalid-option/options.json
deleted file mode 100644
index b3c8b7856dca2..0000000000000
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-invalid-option/options.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "plugins": [["proposal-object-rest-spread", { "useBuiltIns": "invalidOption" }]],
-  "throws": ".useBuiltIns must be a boolean, or undefined"
-}
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-true/input.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-true/input.js
deleted file mode 100644
index 8d610842d85f6..0000000000000
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-true/input.js
+++ /dev/null
@@ -1 +0,0 @@
-z = { x, ...y };
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-true/output.js b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-true/output.js
deleted file mode 100644
index 0bf9ce91beac0..0000000000000
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/assignment-true/output.js
+++ /dev/null
@@ -1,3 +0,0 @@
-z = Object.assign({
-  x
-}, y);
diff --git a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/options.json b/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/options.json
deleted file mode 100644
index 6efcc3ceb44d4..0000000000000
--- a/packages/babel-plugin-proposal-object-rest-spread/test/fixtures/useBuiltIns/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "plugins": [["proposal-object-rest-spread", { "useBuiltIns": true }]]
-}
diff --git a/packages/babel-plugin-proposal-optional-catch-binding/package.json b/packages/babel-plugin-proposal-optional-catch-binding/package.json
index 31f337ef1aaee..8c1b484c906fc 100644
--- a/packages/babel-plugin-proposal-optional-catch-binding/package.json
+++ b/packages/babel-plugin-proposal-optional-catch-binding/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-optional-catch-binding",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile optional catch bindings",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-optional-catch-binding",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-optional-catch-binding/src/index.js b/packages/babel-plugin-proposal-optional-catch-binding/src/index.js
index 8c2758fec20f4..f3f0daa99a0ee 100644
--- a/packages/babel-plugin-proposal-optional-catch-binding/src/index.js
+++ b/packages/babel-plugin-proposal-optional-catch-binding/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxOptionalCatchBinding from "@babel/plugin-syntax-optional-catch-binding";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     inherits: syntaxOptionalCatchBinding,
 
@@ -14,4 +17,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-optional-chaining/package.json b/packages/babel-plugin-proposal-optional-chaining/package.json
index 3dc2ff74191e8..52b6635f0684a 100644
--- a/packages/babel-plugin-proposal-optional-chaining/package.json
+++ b/packages/babel-plugin-proposal-optional-chaining/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-optional-chaining",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Transform optional chaining operators into a series of nil checks",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-optional-chaining",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-optional-chaining": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-optional-chaining": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-optional-chaining/src/index.js b/packages/babel-plugin-proposal-optional-chaining/src/index.js
index 1a854c082bdbe..0da7c84238bcf 100644
--- a/packages/babel-plugin-proposal-optional-chaining/src/index.js
+++ b/packages/babel-plugin-proposal-optional-chaining/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxOptionalChaining from "@babel/plugin-syntax-optional-chaining";
 import { types as t } from "@babel/core";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { loose = false } = options;
 
   function optional(path, replacementPath) {
@@ -136,4 +139,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-pipeline-operator/package.json b/packages/babel-plugin-proposal-pipeline-operator/package.json
index 64f11507dbea1..1ea6c1e4b2f53 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/package.json
+++ b/packages/babel-plugin-proposal-pipeline-operator/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-pipeline-operator",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Transform pipeline operator into call expressions",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-pipeline-operator",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-pipeline-operator": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-pipeline-operator": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-pipeline-operator/src/index.js b/packages/babel-plugin-proposal-pipeline-operator/src/index.js
index e96bd2231a9a4..c56b5c84255d9 100644
--- a/packages/babel-plugin-proposal-pipeline-operator/src/index.js
+++ b/packages/babel-plugin-proposal-pipeline-operator/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxPipelineOperator from "@babel/plugin-syntax-pipeline-operator";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     inherits: syntaxPipelineOperator,
 
@@ -57,4 +60,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-throw-expressions/README.md b/packages/babel-plugin-proposal-throw-expressions/README.md
index ee7756895e4d5..5ffb4de615e21 100644
--- a/packages/babel-plugin-proposal-throw-expressions/README.md
+++ b/packages/babel-plugin-proposal-throw-expressions/README.md
@@ -44,4 +44,4 @@ require("@babel/core").transform("code", {
 
 ## References
 
-* [Proposal: Numeric Separators](https://github.com/tc39/proposal-throw-expressions)
+* [Proposal: ECMAScript throw expressions](https://github.com/tc39/proposal-throw-expressions)
diff --git a/packages/babel-plugin-proposal-throw-expressions/package.json b/packages/babel-plugin-proposal-throw-expressions/package.json
index be03aa5f59184..b6f5564338ce5 100644
--- a/packages/babel-plugin-proposal-throw-expressions/package.json
+++ b/packages/babel-plugin-proposal-throw-expressions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-throw-expressions",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Wraps Throw Expressions in an IIFE",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-throw-expressions",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-throw-expressions": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-throw-expressions": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-throw-expressions/src/index.js b/packages/babel-plugin-proposal-throw-expressions/src/index.js
index f5020492637f8..17cc945784a54 100644
--- a/packages/babel-plugin-proposal-throw-expressions/src/index.js
+++ b/packages/babel-plugin-proposal-throw-expressions/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxThrowExpressions from "@babel/plugin-syntax-throw-expressions";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     inherits: syntaxThrowExpressions,
 
@@ -20,4 +23,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-proposal-unicode-property-regex/package.json b/packages/babel-plugin-proposal-unicode-property-regex/package.json
index 7d80de17c86a9..d022068127ee9 100644
--- a/packages/babel-plugin-proposal-unicode-property-regex/package.json
+++ b/packages/babel-plugin-proposal-unicode-property-regex/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-proposal-unicode-property-regex",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile Unicode property escapes in Unicode regular expressions to ES5.",
   "homepage": "https://babeljs.io/",
   "license": "MIT",
@@ -19,14 +19,15 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-proposal-unicode-property-regex",
   "bugs": "https://github.com/babel/babel/issues",
   "dependencies": {
-    "@babel/helper-regex": "7.0.0-beta.39",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/helper-regex": "7.0.0-beta.42",
     "regexpu-core": "^4.1.3"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-proposal-unicode-property-regex/src/index.js b/packages/babel-plugin-proposal-unicode-property-regex/src/index.js
index 5da0afc52b2df..e48298ed89990 100644
--- a/packages/babel-plugin-proposal-unicode-property-regex/src/index.js
+++ b/packages/babel-plugin-proposal-unicode-property-regex/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import rewritePattern from "regexpu-core";
 import * as regex from "@babel/helper-regex";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { useUnicodeFlag = true } = options;
   if (typeof useUnicodeFlag !== "boolean") {
     throw new Error(".useUnicodeFlag must be a boolean, or undefined");
@@ -24,4 +27,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-async-generators/package.json b/packages/babel-plugin-syntax-async-generators/package.json
index d028fe60513a6..db7f3f8caeca5 100644
--- a/packages/babel-plugin-syntax-async-generators/package.json
+++ b/packages/babel-plugin-syntax-async-generators/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-async-generators",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of async generator functions",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-async-generators",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-async-generators/src/index.js b/packages/babel-plugin-syntax-async-generators/src/index.js
index f94586ed81c03..44e1b1dd52aab 100644
--- a/packages/babel-plugin-syntax-async-generators/src/index.js
+++ b/packages/babel-plugin-syntax-async-generators/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("asyncGenerators");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-class-properties/package.json b/packages/babel-plugin-syntax-class-properties/package.json
index 64d4df4a8663b..035bb27909794 100644
--- a/packages/babel-plugin-syntax-class-properties/package.json
+++ b/packages/babel-plugin-syntax-class-properties/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-class-properties",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of class properties",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-class-properties",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-class-properties/src/index.js b/packages/babel-plugin-syntax-class-properties/src/index.js
index 496f07c664764..8f4ee109291a0 100644
--- a/packages/babel-plugin-syntax-class-properties/src/index.js
+++ b/packages/babel-plugin-syntax-class-properties/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("classProperties");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-decorators/package.json b/packages/babel-plugin-syntax-decorators/package.json
index e8ebfeb0896d2..3b15523f0502a 100644
--- a/packages/babel-plugin-syntax-decorators/package.json
+++ b/packages/babel-plugin-syntax-decorators/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-decorators",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of decorators",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-decorators",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-decorators/src/index.js b/packages/babel-plugin-syntax-decorators/src/index.js
index f29917451a4b4..950d6ebc518bd 100644
--- a/packages/babel-plugin-syntax-decorators/src/index.js
+++ b/packages/babel-plugin-syntax-decorators/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("decorators");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-do-expressions/package.json b/packages/babel-plugin-syntax-do-expressions/package.json
index 533bb324faf12..e17cb8165c7f5 100644
--- a/packages/babel-plugin-syntax-do-expressions/package.json
+++ b/packages/babel-plugin-syntax-do-expressions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-do-expressions",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of do expressions",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-do-expressions",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-do-expressions/src/index.js b/packages/babel-plugin-syntax-do-expressions/src/index.js
index 2b91fd23fdbb5..5105beed9c644 100644
--- a/packages/babel-plugin-syntax-do-expressions/src/index.js
+++ b/packages/babel-plugin-syntax-do-expressions/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("doExpressions");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-dynamic-import/package.json b/packages/babel-plugin-syntax-dynamic-import/package.json
index 59e7d4ed6b65c..1861f3f02ebb1 100644
--- a/packages/babel-plugin-syntax-dynamic-import/package.json
+++ b/packages/babel-plugin-syntax-dynamic-import/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-dynamic-import",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of import()",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-dynamic-import",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-dynamic-import/src/index.js b/packages/babel-plugin-syntax-dynamic-import/src/index.js
index bac1815edcea6..bb6dde61e46bd 100644
--- a/packages/babel-plugin-syntax-dynamic-import/src/index.js
+++ b/packages/babel-plugin-syntax-dynamic-import/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("dynamicImport");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-export-default-from/package.json b/packages/babel-plugin-syntax-export-default-from/package.json
index 43147cffd4067..4b424814c8321 100644
--- a/packages/babel-plugin-syntax-export-default-from/package.json
+++ b/packages/babel-plugin-syntax-export-default-from/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-export-default-from",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of export default from",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-export-default-from",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-export-default-from/src/index.js b/packages/babel-plugin-syntax-export-default-from/src/index.js
index 6d7a78feea8a5..fcb0b794492c5 100644
--- a/packages/babel-plugin-syntax-export-default-from/src/index.js
+++ b/packages/babel-plugin-syntax-export-default-from/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("exportDefaultFrom");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-export-namespace-from/package.json b/packages/babel-plugin-syntax-export-namespace-from/package.json
index fd620b2d87720..9fbaf1f774f8e 100644
--- a/packages/babel-plugin-syntax-export-namespace-from/package.json
+++ b/packages/babel-plugin-syntax-export-namespace-from/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-export-namespace-from",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of export namespace from",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-export-namespace-from",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-export-namespace-from/src/index.js b/packages/babel-plugin-syntax-export-namespace-from/src/index.js
index 15dfac7d900bd..21446499a6a0d 100644
--- a/packages/babel-plugin-syntax-export-namespace-from/src/index.js
+++ b/packages/babel-plugin-syntax-export-namespace-from/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("exportNamespaceFrom");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-flow/package.json b/packages/babel-plugin-syntax-flow/package.json
index 4b5cae07dbfe1..ec5455dcbd9e9 100644
--- a/packages/babel-plugin-syntax-flow/package.json
+++ b/packages/babel-plugin-syntax-flow/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-flow",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of the flow syntax",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-flow",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-flow/src/index.js b/packages/babel-plugin-syntax-flow/src/index.js
index 0043b1455fe21..3ad2fbb2db4bc 100644
--- a/packages/babel-plugin-syntax-flow/src/index.js
+++ b/packages/babel-plugin-syntax-flow/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("flow");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-function-bind/package.json b/packages/babel-plugin-syntax-function-bind/package.json
index e67e82f47d2df..429baea7627b8 100644
--- a/packages/babel-plugin-syntax-function-bind/package.json
+++ b/packages/babel-plugin-syntax-function-bind/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-function-bind",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of function bind",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-function-bind",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-function-bind/src/index.js b/packages/babel-plugin-syntax-function-bind/src/index.js
index 31ddfa50c6c95..98c5082f88bcf 100644
--- a/packages/babel-plugin-syntax-function-bind/src/index.js
+++ b/packages/babel-plugin-syntax-function-bind/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("functionBind");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-function-sent/package.json b/packages/babel-plugin-syntax-function-sent/package.json
index 275f71439e62c..78b9a06696b24 100644
--- a/packages/babel-plugin-syntax-function-sent/package.json
+++ b/packages/babel-plugin-syntax-function-sent/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-function-sent",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of the function.sent meta property",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-function-sent",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-function-sent/src/index.js b/packages/babel-plugin-syntax-function-sent/src/index.js
index 9481f1983a056..cb8471dd4af32 100644
--- a/packages/babel-plugin-syntax-function-sent/src/index.js
+++ b/packages/babel-plugin-syntax-function-sent/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("functionSent");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-import-meta/package.json b/packages/babel-plugin-syntax-import-meta/package.json
index 2ff574a97aaf2..a762dadc4f92b 100644
--- a/packages/babel-plugin-syntax-import-meta/package.json
+++ b/packages/babel-plugin-syntax-import-meta/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-import-meta",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of import.meta",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-import-meta",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-import-meta/src/index.js b/packages/babel-plugin-syntax-import-meta/src/index.js
index 0aad339bfc70e..36e22743b08cc 100644
--- a/packages/babel-plugin-syntax-import-meta/src/index.js
+++ b/packages/babel-plugin-syntax-import-meta/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("importMeta");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-jsx/package.json b/packages/babel-plugin-syntax-jsx/package.json
index 8ceae7f4b0be9..2d2aac8931414 100644
--- a/packages/babel-plugin-syntax-jsx/package.json
+++ b/packages/babel-plugin-syntax-jsx/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-jsx",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of jsx",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-jsx",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-jsx/src/index.js b/packages/babel-plugin-syntax-jsx/src/index.js
index eb8986ab28abb..3a17865e6dc8f 100644
--- a/packages/babel-plugin-syntax-jsx/src/index.js
+++ b/packages/babel-plugin-syntax-jsx/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("jsx");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-logical-assignment-operators/.npmignore b/packages/babel-plugin-syntax-logical-assignment-operators/.npmignore
new file mode 100644
index 0000000000000..f9806945836eb
--- /dev/null
+++ b/packages/babel-plugin-syntax-logical-assignment-operators/.npmignore
@@ -0,0 +1,3 @@
+src
+test
+*.log
diff --git a/packages/babel-plugin-syntax-logical-assignment-operators/README.md b/packages/babel-plugin-syntax-logical-assignment-operators/README.md
new file mode 100644
index 0000000000000..07c5371cc3b69
--- /dev/null
+++ b/packages/babel-plugin-syntax-logical-assignment-operators/README.md
@@ -0,0 +1,35 @@
+# @babel/plugin-syntax-logical-assignment-operators
+
+> Allow parsing of the logical assignment operators.
+
+## Installation
+
+```sh
+npm install --save-dev @babel/plugin-syntax-logical-assignment-operators
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "plugins": ["@babel/plugin-syntax-logical-assignment-operators"]
+}
+```
+
+### Via CLI
+
+```sh
+babel --plugins @babel/plugin-syntax-logical-assignment-operators script.js
+```
+
+### Via Node API
+
+```javascript
+require("@babel/core").transform("code", {
+  plugins: ["@babel/plugin-syntax-logical-assignment-operators"]
+});
+```
diff --git a/packages/babel-plugin-syntax-logical-assignment-operators/package.json b/packages/babel-plugin-syntax-logical-assignment-operators/package.json
new file mode 100644
index 0000000000000..4f458b777c449
--- /dev/null
+++ b/packages/babel-plugin-syntax-logical-assignment-operators/package.json
@@ -0,0 +1,20 @@
+{
+  "name": "@babel/plugin-syntax-logical-assignment-operators",
+  "version": "7.0.0-beta.42",
+  "description": "Allow parsing of the logical assignment operators",
+  "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-logical-assignment-operators",
+  "license": "MIT",
+  "main": "lib",
+  "keywords": [
+    "babel-plugin"
+  ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
+  "peerDependencies": {
+    "@babel/core": "7.0.0-beta.42"
+  },
+  "devDependencies": {
+    "@babel/core": "7.0.0-beta.42"
+  }
+}
diff --git a/packages/babel-plugin-syntax-logical-assignment-operators/src/index.js b/packages/babel-plugin-syntax-logical-assignment-operators/src/index.js
new file mode 100644
index 0000000000000..d283645e1cffd
--- /dev/null
+++ b/packages/babel-plugin-syntax-logical-assignment-operators/src/index.js
@@ -0,0 +1,11 @@
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
+  return {
+    manipulateOptions(opts, parserOpts) {
+      parserOpts.plugins.push("logicalAssignment");
+    },
+  };
+});
diff --git a/packages/babel-plugin-syntax-nullish-coalescing-operator/package.json b/packages/babel-plugin-syntax-nullish-coalescing-operator/package.json
index 05e8338b84d52..991bcb62b499d 100644
--- a/packages/babel-plugin-syntax-nullish-coalescing-operator/package.json
+++ b/packages/babel-plugin-syntax-nullish-coalescing-operator/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-nullish-coalescing-operator",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of the nullish-coalescing operator",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-nullish-coalescing-operator",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-nullish-coalescing-operator/src/index.js b/packages/babel-plugin-syntax-nullish-coalescing-operator/src/index.js
index d5cf5faa5afce..69578ca419a1d 100644
--- a/packages/babel-plugin-syntax-nullish-coalescing-operator/src/index.js
+++ b/packages/babel-plugin-syntax-nullish-coalescing-operator/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("nullishCoalescingOperator");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-numeric-separator/package.json b/packages/babel-plugin-syntax-numeric-separator/package.json
index 3764de1b998a2..9c811ec9807bc 100644
--- a/packages/babel-plugin-syntax-numeric-separator/package.json
+++ b/packages/babel-plugin-syntax-numeric-separator/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-numeric-separator",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of Decimal, Binary, Hex and Octal literals that contain a Numeric Literal Separator",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-numeric-separator",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-numeric-separator/src/index.js b/packages/babel-plugin-syntax-numeric-separator/src/index.js
index 7d7fbd4f74b82..8a9cd625ed31f 100644
--- a/packages/babel-plugin-syntax-numeric-separator/src/index.js
+++ b/packages/babel-plugin-syntax-numeric-separator/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("numericSeparator");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-object-rest-spread/package.json b/packages/babel-plugin-syntax-object-rest-spread/package.json
index 43c5a18fcb86c..bf4948b5b923e 100644
--- a/packages/babel-plugin-syntax-object-rest-spread/package.json
+++ b/packages/babel-plugin-syntax-object-rest-spread/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-object-rest-spread",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of object rest/spread",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-object-rest-spread",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-object-rest-spread/src/index.js b/packages/babel-plugin-syntax-object-rest-spread/src/index.js
index 6eb03aa8195ae..7cd1b759a403b 100644
--- a/packages/babel-plugin-syntax-object-rest-spread/src/index.js
+++ b/packages/babel-plugin-syntax-object-rest-spread/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("objectRestSpread");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-optional-catch-binding/package.json b/packages/babel-plugin-syntax-optional-catch-binding/package.json
index 704bf69f23fba..46cd999af02f5 100644
--- a/packages/babel-plugin-syntax-optional-catch-binding/package.json
+++ b/packages/babel-plugin-syntax-optional-catch-binding/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-optional-catch-binding",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of optional catch bindings",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-optional-catch-binding",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-optional-catch-binding/src/index.js b/packages/babel-plugin-syntax-optional-catch-binding/src/index.js
index 769a8df74fd1e..466b78e570f32 100644
--- a/packages/babel-plugin-syntax-optional-catch-binding/src/index.js
+++ b/packages/babel-plugin-syntax-optional-catch-binding/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("optionalCatchBinding");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-optional-chaining/package.json b/packages/babel-plugin-syntax-optional-chaining/package.json
index 89ea74f7c2a61..5d9fc743e6090 100644
--- a/packages/babel-plugin-syntax-optional-chaining/package.json
+++ b/packages/babel-plugin-syntax-optional-chaining/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-optional-chaining",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of optional properties",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-optional-chaining",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-optional-chaining/src/index.js b/packages/babel-plugin-syntax-optional-chaining/src/index.js
index 76d014a88a6a6..5677a39ee9d7f 100644
--- a/packages/babel-plugin-syntax-optional-chaining/src/index.js
+++ b/packages/babel-plugin-syntax-optional-chaining/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("optionalChaining");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-pipeline-operator/package.json b/packages/babel-plugin-syntax-pipeline-operator/package.json
index 9272fb7aa2a96..553efad561591 100644
--- a/packages/babel-plugin-syntax-pipeline-operator/package.json
+++ b/packages/babel-plugin-syntax-pipeline-operator/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-pipeline-operator",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of the pipeline operator",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-pipeline-operator",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-pipeline-operator/src/index.js b/packages/babel-plugin-syntax-pipeline-operator/src/index.js
index 0021ae691cfc3..c77a915babaed 100644
--- a/packages/babel-plugin-syntax-pipeline-operator/src/index.js
+++ b/packages/babel-plugin-syntax-pipeline-operator/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("pipelineOperator");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-throw-expressions/package.json b/packages/babel-plugin-syntax-throw-expressions/package.json
index 809ab7e0dead6..ac30d8898b818 100644
--- a/packages/babel-plugin-syntax-throw-expressions/package.json
+++ b/packages/babel-plugin-syntax-throw-expressions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-throw-expressions",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of Throw Expressions",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-throw-expressions",
   "license": "MIT",
@@ -8,10 +8,13 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-throw-expressions/src/index.js b/packages/babel-plugin-syntax-throw-expressions/src/index.js
index 72df255074554..62150d3655d00 100644
--- a/packages/babel-plugin-syntax-throw-expressions/src/index.js
+++ b/packages/babel-plugin-syntax-throw-expressions/src/index.js
@@ -1,7 +1,11 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("throwExpressions");
     },
   };
-}
+});
diff --git a/packages/babel-plugin-syntax-typescript/package.json b/packages/babel-plugin-syntax-typescript/package.json
index c06ed54ffeca1..e95f1c55f7383 100644
--- a/packages/babel-plugin-syntax-typescript/package.json
+++ b/packages/babel-plugin-syntax-typescript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-syntax-typescript",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Allow parsing of TypeScript syntax",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-syntax-typescript",
   "license": "MIT",
@@ -9,10 +9,13 @@
     "babel-plugin",
     "typescript"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-syntax-typescript/src/index.js b/packages/babel-plugin-syntax-typescript/src/index.js
index 5dee6ceed19d7..09be2c66a879b 100644
--- a/packages/babel-plugin-syntax-typescript/src/index.js
+++ b/packages/babel-plugin-syntax-typescript/src/index.js
@@ -1,4 +1,8 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push(
@@ -8,4 +12,4 @@ export default function() {
       );
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-arrow-functions/package.json b/packages/babel-plugin-transform-arrow-functions/package.json
index ad3817db1a6cd..f23b89d2e70dd 100644
--- a/packages/babel-plugin-transform-arrow-functions/package.json
+++ b/packages/babel-plugin-transform-arrow-functions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-arrow-functions",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 arrow functions to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-arrow-functions",
   "license": "MIT",
@@ -8,12 +8,15 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39",
-    "@babel/traverse": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42",
+    "@babel/traverse": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-arrow-functions/src/index.js b/packages/babel-plugin-transform-arrow-functions/src/index.js
index 2f02cd0d94ac7..bc74d0eedf988 100644
--- a/packages/babel-plugin-transform-arrow-functions/src/index.js
+++ b/packages/babel-plugin-transform-arrow-functions/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import type NodePath from "@babel/traverse";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { spec } = options;
   return {
     visitor: {
@@ -20,4 +23,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-async-to-generator/package.json b/packages/babel-plugin-transform-async-to-generator/package.json
index f77414b9db728..785c0c89832dd 100644
--- a/packages/babel-plugin-transform-async-to-generator/package.json
+++ b/packages/babel-plugin-transform-async-to-generator/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-async-to-generator",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Turn async functions into ES2015 generators",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-async-to-generator",
   "license": "MIT",
@@ -9,14 +9,15 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-module-imports": "7.0.0-beta.39",
-    "@babel/helper-remap-async-to-generator": "7.0.0-beta.39"
+    "@babel/helper-module-imports": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/helper-remap-async-to-generator": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-async-to-generator/src/index.js b/packages/babel-plugin-transform-async-to-generator/src/index.js
index abb0b11311131..d0aaf7d5c0c17 100644
--- a/packages/babel-plugin-transform-async-to-generator/src/index.js
+++ b/packages/babel-plugin-transform-async-to-generator/src/index.js
@@ -1,8 +1,11 @@
+import { declare } from "@babel/helper-plugin-utils";
 import remapAsyncToGenerator from "@babel/helper-remap-async-to-generator";
 import { addNamed } from "@babel/helper-module-imports";
 import { types as t } from "@babel/core";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { method, module } = options;
 
   if (method && module) {
@@ -18,9 +21,7 @@ export default function(api, options) {
             wrapAsync = state.methodWrapper = addNamed(path, method, module);
           }
 
-          remapAsyncToGenerator(path, state.file, {
-            wrapAsync,
-          });
+          remapAsyncToGenerator(path, { wrapAsync });
         },
       },
     };
@@ -31,10 +32,10 @@ export default function(api, options) {
       Function(path, state) {
         if (!path.node.async || path.node.generator) return;
 
-        remapAsyncToGenerator(path, state.file, {
+        remapAsyncToGenerator(path, {
           wrapAsync: state.addHelper("asyncToGenerator"),
         });
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/async-to-generator/shadowed-promise-import/input.js b/packages/babel-plugin-transform-async-to-generator/test/fixtures/async-to-generator/shadowed-promise-import/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-async-to-generator/test/fixtures/async-to-generator/shadowed-promise-import/input.js
rename to packages/babel-plugin-transform-async-to-generator/test/fixtures/async-to-generator/shadowed-promise-import/input.mjs
diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/async-to-generator/shadowed-promise-import/output.js b/packages/babel-plugin-transform-async-to-generator/test/fixtures/async-to-generator/shadowed-promise-import/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-async-to-generator/test/fixtures/async-to-generator/shadowed-promise-import/output.js
rename to packages/babel-plugin-transform-async-to-generator/test/fixtures/async-to-generator/shadowed-promise-import/output.mjs
diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/default-arrow-export/input.js b/packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/default-arrow-export/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/default-arrow-export/input.js
rename to packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/default-arrow-export/input.mjs
diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/default-export/input.js b/packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/default-export/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/default-export/input.js
rename to packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/default-export/input.mjs
diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/import-and-export/input.js b/packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/import-and-export/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/import-and-export/input.js
rename to packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/import-and-export/input.mjs
diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/lone-export/input.js b/packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/lone-export/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/lone-export/input.js
rename to packages/babel-plugin-transform-async-to-generator/test/fixtures/export-async/lone-export/input.mjs
diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/5880/options.json b/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/5880/options.json
deleted file mode 100644
index 9ed92359fffbf..0000000000000
--- a/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/5880/options.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "plugins": [
-    "external-helpers",
-    "transform-async-to-generator",
-    "transform-destructuring",
-    "syntax-async-generators"
-  ]
-}
diff --git a/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/7178/output.js b/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/7178/output.js
index 509f1f64c90da..834e46ca35ad4 100644
--- a/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/7178/output.js
+++ b/packages/babel-plugin-transform-async-to-generator/test/fixtures/regression/7178/output.js
@@ -4,7 +4,9 @@ function action() {
   return _action.apply(this, arguments);
 }
 
-var _ref = React.createElement(Contact, {
+var _ref =
+/*#__PURE__*/
+React.createElement(Contact, {
   title: title
 });
 
diff --git a/packages/babel-plugin-transform-block-scoped-functions/README.md b/packages/babel-plugin-transform-block-scoped-functions/README.md
index 835d7424bb690..95985cf600a11 100644
--- a/packages/babel-plugin-transform-block-scoped-functions/README.md
+++ b/packages/babel-plugin-transform-block-scoped-functions/README.md
@@ -20,11 +20,10 @@ name("Steve");
 
 ```javascript
 {
-  var _name = function _name(n) {
+  let name = function (n) {
     return n;
   };
 }
-
 name("Steve");
 ```
 
diff --git a/packages/babel-plugin-transform-block-scoped-functions/package.json b/packages/babel-plugin-transform-block-scoped-functions/package.json
index 2a99a5048e5e3..cc49f82317a52 100644
--- a/packages/babel-plugin-transform-block-scoped-functions/package.json
+++ b/packages/babel-plugin-transform-block-scoped-functions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-block-scoped-functions",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel plugin to ensure function declarations at the block level are block scoped",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-block-scoped-functions",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-block-scoped-functions/src/index.js b/packages/babel-plugin-transform-block-scoped-functions/src/index.js
index 29d7a141fdc3f..1f1783dc9e86a 100644
--- a/packages/babel-plugin-transform-block-scoped-functions/src/index.js
+++ b/packages/babel-plugin-transform-block-scoped-functions/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   function statementList(key, path) {
     const paths: Array = path.get(key);
 
@@ -41,4 +44,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-block-scoped-functions/test/fixtures/block-scoped-functions/basic/input.js b/packages/babel-plugin-transform-block-scoped-functions/test/fixtures/block-scoped-functions/basic/input.js
new file mode 100644
index 0000000000000..fe3cbae18f37d
--- /dev/null
+++ b/packages/babel-plugin-transform-block-scoped-functions/test/fixtures/block-scoped-functions/basic/input.js
@@ -0,0 +1,7 @@
+{
+  function name (n) {
+    return n;
+  }
+}
+
+name("Steve");
diff --git a/packages/babel-plugin-transform-block-scoped-functions/test/fixtures/block-scoped-functions/basic/options.json b/packages/babel-plugin-transform-block-scoped-functions/test/fixtures/block-scoped-functions/basic/options.json
new file mode 100644
index 0000000000000..de68899ab3c2e
--- /dev/null
+++ b/packages/babel-plugin-transform-block-scoped-functions/test/fixtures/block-scoped-functions/basic/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["transform-block-scoped-functions"]
+}
diff --git a/packages/babel-plugin-transform-block-scoped-functions/test/fixtures/block-scoped-functions/basic/output.js b/packages/babel-plugin-transform-block-scoped-functions/test/fixtures/block-scoped-functions/basic/output.js
new file mode 100644
index 0000000000000..3a82ac158794b
--- /dev/null
+++ b/packages/babel-plugin-transform-block-scoped-functions/test/fixtures/block-scoped-functions/basic/output.js
@@ -0,0 +1,6 @@
+{
+  let name = function (n) {
+    return n;
+  };
+}
+name("Steve");
diff --git a/packages/babel-plugin-transform-block-scoped-functions/test/index.js b/packages/babel-plugin-transform-block-scoped-functions/test/index.js
new file mode 100644
index 0000000000000..1b534b8fc64af
--- /dev/null
+++ b/packages/babel-plugin-transform-block-scoped-functions/test/index.js
@@ -0,0 +1,3 @@
+import runner from "@babel/helper-plugin-test-runner";
+
+runner(__dirname);
diff --git a/packages/babel-plugin-transform-block-scoping/package.json b/packages/babel-plugin-transform-block-scoping/package.json
index aaae3d66f39fa..d5bfae9b0aec7 100644
--- a/packages/babel-plugin-transform-block-scoping/package.json
+++ b/packages/babel-plugin-transform-block-scoping/package.json
@@ -1,21 +1,22 @@
 {
   "name": "@babel/plugin-transform-block-scoping",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 block scoping (const and let) to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-block-scoping",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
     "lodash": "^4.2.0"
   },
   "keywords": [
     "babel-plugin"
   ],
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-block-scoping/src/index.js b/packages/babel-plugin-transform-block-scoping/src/index.js
index 17349a14bddd2..560368cf0fbf7 100644
--- a/packages/babel-plugin-transform-block-scoping/src/index.js
+++ b/packages/babel-plugin-transform-block-scoping/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import type NodePath from "@babel/traverse";
 import type Scope from "@babel/traverse";
 import { visitor as tdzVisitor } from "./tdz";
@@ -7,7 +8,9 @@ import { traverse, template, types as t } from "@babel/core";
 
 const DONE = new WeakSet();
 
-export default function(api, opts) {
+export default declare((api, opts) => {
+  api.assertVersion(7);
+
   const { throwIfClosureRequired = false, tdz: tdzEnabled = false } = opts;
   if (typeof throwIfClosureRequired !== "boolean") {
     throw new Error(`.throwIfClosureRequired must be a boolean, or undefined`);
@@ -94,7 +97,7 @@ export default function(api, opts) {
       },
     },
   };
-}
+});
 
 function ignoreBlock(path) {
   return t.isLoop(path.parent) || t.isCatchClause(path.parent);
diff --git a/packages/babel-plugin-transform-block-scoping/test/fixtures/pass/export.js b/packages/babel-plugin-transform-block-scoping/test/fixtures/pass/export.mjs
similarity index 100%
rename from packages/babel-plugin-transform-block-scoping/test/fixtures/pass/export.js
rename to packages/babel-plugin-transform-block-scoping/test/fixtures/pass/export.mjs
diff --git a/packages/babel-plugin-transform-classes/package.json b/packages/babel-plugin-transform-classes/package.json
index e6d9c2afa1b91..0cdea2967fbe8 100644
--- a/packages/babel-plugin-transform-classes/package.json
+++ b/packages/babel-plugin-transform-classes/package.json
@@ -1,26 +1,28 @@
 {
   "name": "@babel/plugin-transform-classes",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 classes to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-classes",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-annotate-as-pure": "7.0.0-beta.39",
-    "@babel/helper-define-map": "7.0.0-beta.39",
-    "@babel/helper-function-name": "7.0.0-beta.39",
-    "@babel/helper-optimise-call-expression": "7.0.0-beta.39",
-    "@babel/helper-replace-supers": "7.0.0-beta.39",
+    "@babel/helper-annotate-as-pure": "7.0.0-beta.42",
+    "@babel/helper-define-map": "7.0.0-beta.42",
+    "@babel/helper-function-name": "7.0.0-beta.42",
+    "@babel/helper-optimise-call-expression": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/helper-replace-supers": "7.0.0-beta.42",
+    "@babel/helper-split-export-declaration": "7.0.0-beta.42",
     "globals": "^11.1.0"
   },
   "keywords": [
     "babel-plugin"
   ],
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-classes/src/index.js b/packages/babel-plugin-transform-classes/src/index.js
index a93fe739edee4..926d3cce5afb5 100644
--- a/packages/babel-plugin-transform-classes/src/index.js
+++ b/packages/babel-plugin-transform-classes/src/index.js
@@ -1,7 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import LooseTransformer from "./loose";
 import VanillaTransformer from "./vanilla";
 import annotateAsPure from "@babel/helper-annotate-as-pure";
 import nameFunction from "@babel/helper-function-name";
+import splitExportDeclaration from "@babel/helper-split-export-declaration";
 import { types as t } from "@babel/core";
 import globals from "globals";
 
@@ -13,7 +15,9 @@ const builtinClasses = new Set([
   ...getBuiltinClasses("browser"),
 ]);
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { loose } = options;
   const Constructor = loose ? LooseTransformer : VanillaTransformer;
 
@@ -24,19 +28,7 @@ export default function(api, options) {
     visitor: {
       ExportDefaultDeclaration(path) {
         if (!path.get("declaration").isClassDeclaration()) return;
-
-        const { node } = path;
-        const ref =
-          node.declaration.id || path.scope.generateUidIdentifier("class");
-        node.declaration.id = ref;
-
-        // Split the class declaration and the export into two separate statements.
-        path.replaceWith(node.declaration);
-        path.insertAfter(
-          t.exportNamedDeclaration(null, [
-            t.exportSpecifier(t.cloneNode(ref), t.identifier("default")),
-          ]),
-        );
+        splitExportDeclaration(path);
       },
 
       ClassDeclaration(path) {
@@ -76,4 +68,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/extend-builtins/loose/output.js b/packages/babel-plugin-transform-classes/test/fixtures/extend-builtins/loose/output.js
index 90a34b02cd602..35bb5541b9093 100644
--- a/packages/babel-plugin-transform-classes/test/fixtures/extend-builtins/loose/output.js
+++ b/packages/babel-plugin-transform-classes/test/fixtures/extend-builtins/loose/output.js
@@ -1,14 +1,12 @@
 function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
 
-var _gPO = Object.getPrototypeOf || function _gPO(o) { return o.__proto__; };
+function _gPO(o) { _gPO = Object.getPrototypeOf || function _gPO(o) { return o.__proto__; }; return _gPO(o); }
 
-var _sPO = Object.setPrototypeOf || function _sPO(o, p) { o.__proto__ = p; return o; };
+function _sPO(o, p) { _sPO = Object.setPrototypeOf || function _sPO(o, p) { o.__proto__ = p; return o; }; return _sPO(o, p); }
 
-var _construct = typeof Reflect === "object" && Reflect.construct || function _construct(Parent, args, Class) { var Constructor, a = [null]; a.push.apply(a, args); Constructor = Parent.bind.apply(Parent, a); return _sPO(new Constructor(), Class.prototype); };
+function _construct(Parent, args, Class) { _construct = typeof Reflect === "object" && Reflect.construct || function _construct(Parent, args, Class) { var Constructor, a = [null]; a.push.apply(a, args); Constructor = Parent.bind.apply(Parent, a); return _sPO(new Constructor(), Class.prototype); }; return _construct(Parent, args, Class); }
 
-var _cache = typeof Map === "function" && new Map();
-
-function _wrapNativeSuper(Class) { if (typeof Class !== "function") { throw new TypeError("Super expression must either be null or a function"); } if (typeof _cache !== "undefined") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() {} Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writeable: true, configurable: true } }); return _sPO(Wrapper, _sPO(function Super() { return _construct(Class, arguments, _gPO(this).constructor); }, Class)); }
+function _wrapNativeSuper(Class) { var _cache = typeof Map === "function" ? new Map() : undefined; _wrapNativeSuper = function _wrapNativeSuper(Class) { if (typeof Class !== "function") { throw new TypeError("Super expression must either be null or a function"); } if (typeof _cache !== "undefined") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() {} Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writable: true, configurable: true } }); return _sPO(Wrapper, _sPO(function Super() { return _construct(Class, arguments, _gPO(this).constructor); }, Class)); }; return _wrapNativeSuper(Class); }
 
 var List =
 /*#__PURE__*/
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/extend-builtins/spec/output.js b/packages/babel-plugin-transform-classes/test/fixtures/extend-builtins/spec/output.js
index b6a5b878b7d84..877197c6617ee 100644
--- a/packages/babel-plugin-transform-classes/test/fixtures/extend-builtins/spec/output.js
+++ b/packages/babel-plugin-transform-classes/test/fixtures/extend-builtins/spec/output.js
@@ -1,18 +1,18 @@
 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
-function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
+function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
 
-function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
+function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-var _gPO = Object.getPrototypeOf || function _gPO(o) { return o.__proto__; };
+function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
 
-var _sPO = Object.setPrototypeOf || function _sPO(o, p) { o.__proto__ = p; return o; };
+function _gPO(o) { _gPO = Object.getPrototypeOf || function _gPO(o) { return o.__proto__; }; return _gPO(o); }
 
-var _construct = typeof Reflect === "object" && Reflect.construct || function _construct(Parent, args, Class) { var Constructor, a = [null]; a.push.apply(a, args); Constructor = Parent.bind.apply(Parent, a); return _sPO(new Constructor(), Class.prototype); };
+function _sPO(o, p) { _sPO = Object.setPrototypeOf || function _sPO(o, p) { o.__proto__ = p; return o; }; return _sPO(o, p); }
 
-var _cache = typeof Map === "function" && new Map();
+function _construct(Parent, args, Class) { _construct = typeof Reflect === "object" && Reflect.construct || function _construct(Parent, args, Class) { var Constructor, a = [null]; a.push.apply(a, args); Constructor = Parent.bind.apply(Parent, a); return _sPO(new Constructor(), Class.prototype); }; return _construct(Parent, args, Class); }
 
-function _wrapNativeSuper(Class) { if (typeof Class !== "function") { throw new TypeError("Super expression must either be null or a function"); } if (typeof _cache !== "undefined") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() {} Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writeable: true, configurable: true } }); return _sPO(Wrapper, _sPO(function Super() { return _construct(Class, arguments, _gPO(this).constructor); }, Class)); }
+function _wrapNativeSuper(Class) { var _cache = typeof Map === "function" ? new Map() : undefined; _wrapNativeSuper = function _wrapNativeSuper(Class) { if (typeof Class !== "function") { throw new TypeError("Super expression must either be null or a function"); } if (typeof _cache !== "undefined") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() {} Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writable: true, configurable: true } }); return _sPO(Wrapper, _sPO(function Super() { return _construct(Class, arguments, _gPO(this).constructor); }, Class)); }; return _wrapNativeSuper(Class); }
 
 var List =
 /*#__PURE__*/
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/regression/2663/input.js b/packages/babel-plugin-transform-classes/test/fixtures/regression/2663/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-classes/test/fixtures/regression/2663/input.js
rename to packages/babel-plugin-transform-classes/test/fixtures/regression/2663/input.mjs
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/regression/2694/input.js b/packages/babel-plugin-transform-classes/test/fixtures/regression/2694/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-classes/test/fixtures/regression/2694/input.js
rename to packages/babel-plugin-transform-classes/test/fixtures/regression/2694/input.mjs
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/regression/2775/input.js b/packages/babel-plugin-transform-classes/test/fixtures/regression/2775/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-classes/test/fixtures/regression/2775/input.js
rename to packages/babel-plugin-transform-classes/test/fixtures/regression/2775/input.mjs
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/regression/2775/output.js b/packages/babel-plugin-transform-classes/test/fixtures/regression/2775/output.js
index 786d7c177df46..599a3a5438d37 100644
--- a/packages/babel-plugin-transform-classes/test/fixtures/regression/2775/output.js
+++ b/packages/babel-plugin-transform-classes/test/fixtures/regression/2775/output.js
@@ -5,7 +5,7 @@ Object.defineProperty(exports, "__esModule", {
 });
 exports.default = void 0;
 
-var _react = babelHelpers.interopRequireWildcard(require("react"));
+var _react = babelHelpers.interopRequireDefault(require("react"));
 
 var RandomComponent =
 /*#__PURE__*/
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/regression/2941/input.js b/packages/babel-plugin-transform-classes/test/fixtures/regression/2941/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-classes/test/fixtures/regression/2941/input.js
rename to packages/babel-plugin-transform-classes/test/fixtures/regression/2941/input.mjs
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/regression/2941/output.js b/packages/babel-plugin-transform-classes/test/fixtures/regression/2941/output.js
index 3e311d72a65b9..9c148ffe0c530 100644
--- a/packages/babel-plugin-transform-classes/test/fixtures/regression/2941/output.js
+++ b/packages/babel-plugin-transform-classes/test/fixtures/regression/2941/output.js
@@ -5,8 +5,8 @@ Object.defineProperty(exports, "__esModule", {
 });
 exports.default = void 0;
 
-var _class = function _class() {
-  babelHelpers.classCallCheck(this, _class);
+var _default = function _default() {
+  babelHelpers.classCallCheck(this, _default);
 };
 
-exports.default = _class;
+exports.default = _default;
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/regression/3028/input.js b/packages/babel-plugin-transform-classes/test/fixtures/regression/3028/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-classes/test/fixtures/regression/3028/input.js
rename to packages/babel-plugin-transform-classes/test/fixtures/regression/3028/input.mjs
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/regression/T6750/input.js b/packages/babel-plugin-transform-classes/test/fixtures/regression/T6750/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-classes/test/fixtures/regression/T6750/input.js
rename to packages/babel-plugin-transform-classes/test/fixtures/regression/T6750/input.mjs
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/regression/T7537/output.js b/packages/babel-plugin-transform-classes/test/fixtures/regression/T7537/output.js
index dc8a3c6389a0c..3b47c5925e210 100644
--- a/packages/babel-plugin-transform-classes/test/fixtures/regression/T7537/output.js
+++ b/packages/babel-plugin-transform-classes/test/fixtures/regression/T7537/output.js
@@ -1,6 +1,8 @@
 function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+
+function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
 function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
 
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/spec/export-default/input.js b/packages/babel-plugin-transform-classes/test/fixtures/spec/export-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-classes/test/fixtures/spec/export-default/input.js
rename to packages/babel-plugin-transform-classes/test/fixtures/spec/export-default/input.mjs
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/spec/export-default/output.js b/packages/babel-plugin-transform-classes/test/fixtures/spec/export-default/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-classes/test/fixtures/spec/export-default/output.js
rename to packages/babel-plugin-transform-classes/test/fixtures/spec/export-default/output.mjs
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/spec/export-super-class/input.js b/packages/babel-plugin-transform-classes/test/fixtures/spec/export-super-class/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-classes/test/fixtures/spec/export-super-class/input.js
rename to packages/babel-plugin-transform-classes/test/fixtures/spec/export-super-class/input.mjs
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/spec/export-super-class/output.js b/packages/babel-plugin-transform-classes/test/fixtures/spec/export-super-class/output.js
deleted file mode 100644
index 7360483607989..0000000000000
--- a/packages/babel-plugin-transform-classes/test/fixtures/spec/export-super-class/output.js
+++ /dev/null
@@ -1,14 +0,0 @@
-var _class =
-/*#__PURE__*/
-function (_A) {
-  babelHelpers.inherits(_class, _A);
-
-  function _class() {
-    babelHelpers.classCallCheck(this, _class);
-    return babelHelpers.possibleConstructorReturn(this, (_class.__proto__ || Object.getPrototypeOf(_class)).apply(this, arguments));
-  }
-
-  return _class;
-}(A);
-
-export { _class as default };
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/spec/export-super-class/output.mjs b/packages/babel-plugin-transform-classes/test/fixtures/spec/export-super-class/output.mjs
new file mode 100644
index 0000000000000..6aafe37c5ac59
--- /dev/null
+++ b/packages/babel-plugin-transform-classes/test/fixtures/spec/export-super-class/output.mjs
@@ -0,0 +1,14 @@
+var _default =
+/*#__PURE__*/
+function (_A) {
+  babelHelpers.inherits(_default, _A);
+
+  function _default() {
+    babelHelpers.classCallCheck(this, _default);
+    return babelHelpers.possibleConstructorReturn(this, (_default.__proto__ || Object.getPrototypeOf(_default)).apply(this, arguments));
+  }
+
+  return _default;
+}(A);
+
+export { _default as default };
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/spec/name-method-collision/input.js b/packages/babel-plugin-transform-classes/test/fixtures/spec/name-method-collision/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-classes/test/fixtures/spec/name-method-collision/input.js
rename to packages/babel-plugin-transform-classes/test/fixtures/spec/name-method-collision/input.mjs
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/spec/super-reference-before-bare-super-inline/output.js b/packages/babel-plugin-transform-classes/test/fixtures/spec/super-reference-before-bare-super-inline/output.js
index e019eadfd9d24..ef3b23c9b24da 100644
--- a/packages/babel-plugin-transform-classes/test/fixtures/spec/super-reference-before-bare-super-inline/output.js
+++ b/packages/babel-plugin-transform-classes/test/fixtures/spec/super-reference-before-bare-super-inline/output.js
@@ -1,6 +1,6 @@
 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
-function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
+function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
 
 function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
 
diff --git a/packages/babel-plugin-transform-classes/test/fixtures/spec/super-reference-before-bare-super/output.js b/packages/babel-plugin-transform-classes/test/fixtures/spec/super-reference-before-bare-super/output.js
index 854033398beb9..9413bc4a635e8 100644
--- a/packages/babel-plugin-transform-classes/test/fixtures/spec/super-reference-before-bare-super/output.js
+++ b/packages/babel-plugin-transform-classes/test/fixtures/spec/super-reference-before-bare-super/output.js
@@ -1,6 +1,6 @@
 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
-function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
+function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
 
 function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
 
diff --git a/packages/babel-plugin-transform-computed-properties/package.json b/packages/babel-plugin-transform-computed-properties/package.json
index d9a327256e529..3ae6f1f7df3d9 100644
--- a/packages/babel-plugin-transform-computed-properties/package.json
+++ b/packages/babel-plugin-transform-computed-properties/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-computed-properties",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 computed properties to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-computed-properties",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-computed-properties/src/index.js b/packages/babel-plugin-transform-computed-properties/src/index.js
index 7fb80c227bb92..e751f50088778 100644
--- a/packages/babel-plugin-transform-computed-properties/src/index.js
+++ b/packages/babel-plugin-transform-computed-properties/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { template, types as t } from "@babel/core";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { loose } = options;
   const pushComputedProps = loose
     ? pushComputedPropsLoose
@@ -199,4 +202,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-computed-properties/test/fixtures/regression/7144/input.js b/packages/babel-plugin-transform-computed-properties/test/fixtures/regression/7144/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-computed-properties/test/fixtures/regression/7144/input.js
rename to packages/babel-plugin-transform-computed-properties/test/fixtures/regression/7144/input.mjs
diff --git a/packages/babel-plugin-transform-computed-properties/test/fixtures/regression/7144/output.js b/packages/babel-plugin-transform-computed-properties/test/fixtures/regression/7144/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-computed-properties/test/fixtures/regression/7144/output.js
rename to packages/babel-plugin-transform-computed-properties/test/fixtures/regression/7144/output.mjs
diff --git a/packages/babel-plugin-transform-destructuring/README.md b/packages/babel-plugin-transform-destructuring/README.md
index 93c9fcdf0c697..33d1677a19597 100644
--- a/packages/babel-plugin-transform-destructuring/README.md
+++ b/packages/babel-plugin-transform-destructuring/README.md
@@ -51,3 +51,42 @@ require("@babel/core").transform("code", {
   plugins: ["@babel/plugin-transform-destructuring"]
 });
 ```
+
+## Options
+
+### `loose`
+
+`boolean`, defaults to `false`.
+
+Enabling this option will assume that what you want to destructure is an array and won't use `Array.from` on other iterables.
+
+### `useBuiltIns`
+
+`boolean`, defaults to `false`.
+
+Enabling this option will use `Object.assign` directly instead of the Babel's `extends` helper. 
+
+##### Example
+
+**.babelrc**
+
+```json
+{
+  "plugins": [
+    ["@babel/plugin-transform-destructuring", { "useBuiltIns": true }]
+  ]
+}
+```
+
+**In**
+
+```js
+var { ...x } = z;
+```
+
+**Out**
+
+```js
+var _z = z,
+    x = Object.assign({}, _z);
+```
diff --git a/packages/babel-plugin-transform-destructuring/package.json b/packages/babel-plugin-transform-destructuring/package.json
index 7046d1ae856e8..3e829265ab5ad 100644
--- a/packages/babel-plugin-transform-destructuring/package.json
+++ b/packages/babel-plugin-transform-destructuring/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-destructuring",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 destructuring to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-destructuring",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-destructuring/src/index.js b/packages/babel-plugin-transform-destructuring/src/index.js
index 2308c0af45a41..60dcdcda1bbcb 100644
--- a/packages/babel-plugin-transform-destructuring/src/index.js
+++ b/packages/babel-plugin-transform-destructuring/src/index.js
@@ -1,13 +1,23 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function(api, options) {
-  const { loose = false } = options;
+export default declare((api, options) => {
+  api.assertVersion(7);
+
+  const { loose = false, useBuiltIns = false } = options;
+
   if (typeof loose !== "boolean") {
     throw new Error(`.loose must be a boolean or undefined`);
   }
 
   const arrayOnlySpread = loose;
 
+  function getExtendsHelper(file) {
+    return useBuiltIns
+      ? t.memberExpression(t.identifier("Object"), t.identifier("assign"))
+      : file.addHelper("extends");
+  }
+
   /**
    * Test if a VariableDeclaration's declarations contains any Patterns.
    */
@@ -108,43 +118,40 @@ export default function(api, options) {
       }
     }
 
-    pushAssignmentPattern(pattern, valueRef) {
+    pushAssignmentPattern({ left, right }, valueRef) {
       // we need to assign the current value of the assignment to avoid evaluating
       // it more than once
+      const tempId = this.scope.generateUidIdentifierBasedOnNode(valueRef);
 
-      const tempValueRef = this.scope.generateUidBasedOnNode(valueRef);
-
-      const declar = t.variableDeclaration("var", [
-        t.variableDeclarator(t.identifier(tempValueRef), valueRef),
-      ]);
-      declar._blockHoist = this.blockHoist;
-      this.nodes.push(declar);
-
-      //
+      this.nodes.push(this.buildVariableDeclaration(tempId, valueRef));
 
       const tempConditional = t.conditionalExpression(
         t.binaryExpression(
           "===",
-          t.identifier(tempValueRef),
+          t.cloneNode(tempId),
           this.scope.buildUndefinedNode(),
         ),
-        pattern.right,
-        t.identifier(tempValueRef),
+        right,
+        t.cloneNode(tempId),
       );
 
-      const left = pattern.left;
       if (t.isPattern(left)) {
-        const tempValueDefault = t.expressionStatement(
-          t.assignmentExpression(
-            "=",
-            t.identifier(tempValueRef),
-            tempConditional,
-          ),
-        );
-        tempValueDefault._blockHoist = this.blockHoist;
+        let patternId;
+        let node;
 
-        this.nodes.push(tempValueDefault);
-        this.push(left, t.identifier(tempValueRef));
+        if (this.kind === "const") {
+          patternId = this.scope.generateUidIdentifier(tempId.name);
+          node = this.buildVariableDeclaration(patternId, tempConditional);
+        } else {
+          patternId = tempId;
+
+          node = t.expressionStatement(
+            t.assignmentExpression("=", t.cloneNode(tempId), tempConditional),
+          );
+        }
+
+        this.nodes.push(node);
+        this.push(left, patternId);
       } else {
         this.nodes.push(this.buildVariableAssignment(left, tempConditional));
       }
@@ -172,14 +179,21 @@ export default function(api, options) {
         keys.push(t.cloneNode(key));
       }
 
-      keys = t.arrayExpression(keys);
+      let value;
+      if (keys.length === 0) {
+        value = t.callExpression(getExtendsHelper(this), [
+          t.objectExpression([]),
+          t.cloneNode(objRef),
+        ]);
+      } else {
+        keys = t.arrayExpression(keys);
 
-      //
+        value = t.callExpression(this.addHelper("objectWithoutProperties"), [
+          t.cloneNode(objRef),
+          keys,
+        ]);
+      }
 
-      const value = t.callExpression(
-        this.addHelper("objectWithoutProperties"),
-        [t.cloneNode(objRef), keys],
-      );
       this.nodes.push(this.buildVariableAssignment(spreadProp.argument, value));
     }
 
@@ -583,4 +597,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/exec.js b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/exec.js
new file mode 100644
index 0000000000000..e05920b47f65e
--- /dev/null
+++ b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/exec.js
@@ -0,0 +1,5 @@
+const getState = () => ({});
+
+const { data: { courses: oldCourses = [] } = {} } = getState();
+
+assert.deepEqual(oldCourses, []);
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/input.js b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/input.js
new file mode 100644
index 0000000000000..09e29d6f8b280
--- /dev/null
+++ b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/input.js
@@ -0,0 +1 @@
+const { data: { courses: oldCourses = [] } = {} } = getState();
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/options.json b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/options.json
new file mode 100644
index 0000000000000..84e28c07f51e9
--- /dev/null
+++ b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["transform-destructuring"]
+}
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/output.js b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/output.js
new file mode 100644
index 0000000000000..708ac3713300b
--- /dev/null
+++ b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/const/output.js
@@ -0,0 +1,5 @@
+const _getState = getState(),
+      _getState$data = _getState.data,
+      _getState$data2 = _getState$data === void 0 ? {} : _getState$data,
+      _getState$data2$cours = _getState$data2.courses,
+      oldCourses = _getState$data2$cours === void 0 ? [] : _getState$data2$cours;
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest-builtins/input.js b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest-builtins/input.js
new file mode 100644
index 0000000000000..20b5387a592e1
--- /dev/null
+++ b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest-builtins/input.js
@@ -0,0 +1,7 @@
+var z = {};
+var { ...x } = z;
+var { x, ...y } = z;
+var { [x]: x, ...y } = z;
+(function({ x, ...y }) { });
+
+({ x, y, ...z } = o);
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest-builtins/options.json b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest-builtins/options.json
new file mode 100644
index 0000000000000..a4a5f2d213ea7
--- /dev/null
+++ b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest-builtins/options.json
@@ -0,0 +1,11 @@
+{
+  "plugins": [
+    "external-helpers",
+    ["transform-destructuring", { "useBuiltIns": true }],
+    "transform-spread",
+    "transform-parameters",
+    "transform-block-scoping",
+    "proposal-object-rest-spread",
+    "transform-regenerator"
+  ]
+}
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest-builtins/output.js b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest-builtins/output.js
new file mode 100644
index 0000000000000..8e8f967908537
--- /dev/null
+++ b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest-builtins/output.js
@@ -0,0 +1,20 @@
+var z = {};
+var _z = z,
+    x = Object.assign({}, _z);
+var _z2 = z,
+    x = _z2.x,
+    y = babelHelpers.objectWithoutProperties(_z2, ["x"]);
+var _z3 = z,
+    x = _z3[x],
+    y = babelHelpers.objectWithoutProperties(_z3, [x]);
+
+(function (_ref) {
+  var x = _ref.x,
+      y = babelHelpers.objectWithoutProperties(_ref, ["x"]);
+});
+
+var _o = o;
+x = _o.x;
+y = _o.y;
+z = babelHelpers.objectWithoutProperties(_o, ["x", "y"]);
+_o;
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest/output.js b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest/output.js
index 5c7315f73b0b3..0729c49dd0e2c 100644
--- a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest/output.js
+++ b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/es7-object-rest/output.js
@@ -1,6 +1,6 @@
 var z = {};
 var _z = z,
-    x = babelHelpers.objectWithoutProperties(_z, []);
+    x = babelHelpers.extends({}, _z);
 var _z2 = z,
     x = _z2.x,
     y = babelHelpers.objectWithoutProperties(_z2, ["x"]);
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/export-variable/input.js b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/export-variable/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/export-variable/input.js
rename to packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/export-variable/input.mjs
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/export-variable/output.js b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/export-variable/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/export-variable/output.js
rename to packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/export-variable/output.mjs
diff --git a/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/issue-6373/input.js b/packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/issue-6373/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/issue-6373/input.js
rename to packages/babel-plugin-transform-destructuring/test/fixtures/destructuring/issue-6373/input.mjs
diff --git a/packages/babel-plugin-transform-dotall-regex/package.json b/packages/babel-plugin-transform-dotall-regex/package.json
index 1600807c7662b..9a1d44e45929d 100644
--- a/packages/babel-plugin-transform-dotall-regex/package.json
+++ b/packages/babel-plugin-transform-dotall-regex/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-dotall-regex",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile regular expressions using the `s` (`dotAll`) flag to ES5.",
   "homepage": "https://babeljs.io/",
   "license": "MIT",
@@ -21,14 +21,15 @@
   },
   "bugs": "https://github.com/babel/babel/issues",
   "dependencies": {
-    "@babel/helper-regex": "7.0.0-beta.39",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/helper-regex": "7.0.0-beta.42",
     "regexpu-core": "^4.1.3"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-dotall-regex/src/index.js b/packages/babel-plugin-transform-dotall-regex/src/index.js
index 4a25982031fbb..e1303cd903117 100644
--- a/packages/babel-plugin-transform-dotall-regex/src/index.js
+++ b/packages/babel-plugin-transform-dotall-regex/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import rewritePattern from "regexpu-core";
 import * as regex from "@babel/helper-regex";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       RegExpLiteral(path) {
@@ -17,4 +20,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-duplicate-keys/package.json b/packages/babel-plugin-transform-duplicate-keys/package.json
index 072991a1bd7cd..0875add7e354b 100644
--- a/packages/babel-plugin-transform-duplicate-keys/package.json
+++ b/packages/babel-plugin-transform-duplicate-keys/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-duplicate-keys",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile objects with duplicate keys to valid strict ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-duplicate-keys",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-duplicate-keys/src/index.js b/packages/babel-plugin-transform-duplicate-keys/src/index.js
index 4c80dd0eb4b9c..ff69a0b49f835 100644
--- a/packages/babel-plugin-transform-duplicate-keys/src/index.js
+++ b/packages/babel-plugin-transform-duplicate-keys/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
 function getName(key) {
@@ -7,7 +8,9 @@ function getName(key) {
   return key.value.toString();
 }
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       ObjectExpression(path) {
@@ -65,4 +68,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-exponentiation-operator/package.json b/packages/babel-plugin-transform-exponentiation-operator/package.json
index be68898cda2fb..b35f0a95f2ef9 100644
--- a/packages/babel-plugin-transform-exponentiation-operator/package.json
+++ b/packages/babel-plugin-transform-exponentiation-operator/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-exponentiation-operator",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile exponentiation operator to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-exponentiation-operator",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-builder-binary-assignment-operator-visitor": "7.0.0-beta.39"
+    "@babel/helper-builder-binary-assignment-operator-visitor": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-exponentiation-operator/src/index.js b/packages/babel-plugin-transform-exponentiation-operator/src/index.js
index 58bc8d38396b7..92fa3a95bc23d 100644
--- a/packages/babel-plugin-transform-exponentiation-operator/src/index.js
+++ b/packages/babel-plugin-transform-exponentiation-operator/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import build from "@babel/helper-builder-binary-assignment-operator-visitor";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: build({
       operator: "**",
@@ -14,4 +17,4 @@ export default function() {
       },
     }),
   };
-}
+});
diff --git a/packages/babel-plugin-transform-flow-comments/package.json b/packages/babel-plugin-transform-flow-comments/package.json
index fdd4465dcda96..dea4d0c53d523 100644
--- a/packages/babel-plugin-transform-flow-comments/package.json
+++ b/packages/babel-plugin-transform-flow-comments/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-flow-comments",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Turn flow type annotations into comments",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-flow-comments",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-flow": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-flow": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-flow-comments/src/index.js b/packages/babel-plugin-transform-flow-comments/src/index.js
index 6dec27d2880f7..2ea870857ee52 100644
--- a/packages/babel-plugin-transform-flow-comments/src/index.js
+++ b/packages/babel-plugin-transform-flow-comments/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxFlow from "@babel/plugin-syntax-flow";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   function wrapInFlowComment(path, parent) {
     let attach = path.getPrevSibling();
     let where = "trailing";
@@ -143,4 +146,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-export/input.js b/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-export/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-export/input.js
rename to packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-export/input.mjs
diff --git a/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-export/output.js b/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-export/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-export/output.js
rename to packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-export/output.mjs
diff --git a/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-type-alias/input.js b/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-type-alias/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-type-alias/input.js
rename to packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-type-alias/input.mjs
diff --git a/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-type-alias/output.js b/packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-type-alias/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-type-alias/output.js
rename to packages/babel-plugin-transform-flow-comments/test/fixtures/flow-comments/import-type-alias/output.mjs
diff --git a/packages/babel-plugin-transform-flow-strip-types/package.json b/packages/babel-plugin-transform-flow-strip-types/package.json
index 4de62870009a6..a6c1f6a8a75a2 100644
--- a/packages/babel-plugin-transform-flow-strip-types/package.json
+++ b/packages/babel-plugin-transform-flow-strip-types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-flow-strip-types",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Strip flow type annotations from your output code.",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-flow-strip-types",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-flow": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-flow": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-flow-strip-types/src/index.js b/packages/babel-plugin-transform-flow-strip-types/src/index.js
index 4ec8ab65882de..ae633effd3307 100644
--- a/packages/babel-plugin-transform-flow-strip-types/src/index.js
+++ b/packages/babel-plugin-transform-flow-strip-types/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxFlow from "@babel/plugin-syntax-flow";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   const FLOW_DIRECTIVE = "@flow";
 
   let skipStrip = false;
@@ -107,4 +110,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/input.js b/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/input.js
rename to packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/input.mjs
diff --git a/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/output.js b/packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/output.js
rename to packages/babel-plugin-transform-flow-strip-types/test/fixtures/strip-types/strip-type-annotations/output.mjs
diff --git a/packages/babel-plugin-transform-for-of/package.json b/packages/babel-plugin-transform-for-of/package.json
index e75567ed2b971..c7cda58c5b49e 100644
--- a/packages/babel-plugin-transform-for-of/package.json
+++ b/packages/babel-plugin-transform-for-of/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-for-of",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 for...of to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-for-of",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-for-of/src/index.js b/packages/babel-plugin-transform-for-of/src/index.js
index 43503dfc93fd0..01fe2359819e2 100644
--- a/packages/babel-plugin-transform-for-of/src/index.js
+++ b/packages/babel-plugin-transform-for-of/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { template, types as t } from "@babel/core";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { loose, assumeArray } = options;
 
   if (loose === true && assumeArray === true) {
@@ -332,4 +335,4 @@ export default function(api, options) {
       node: template,
     };
   }
-}
+});
diff --git a/packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-amd/input.js b/packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-amd/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-amd/input.js
rename to packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-amd/input.mjs
diff --git a/packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-commonjs/input.js b/packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-commonjs/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-commonjs/input.js
rename to packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-commonjs/input.mjs
diff --git a/packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-es2015/input.js b/packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-es2015/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-es2015/input.js
rename to packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-es2015/input.mjs
diff --git a/packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-es2015/output.js b/packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-es2015/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-es2015/output.js
rename to packages/babel-plugin-transform-for-of/test/fixtures/for-of-as-array/for-of-import-es2015/output.mjs
diff --git a/packages/babel-plugin-transform-function-name/package.json b/packages/babel-plugin-transform-function-name/package.json
index 6432e8cfe5dd7..c1eb2c436acbd 100644
--- a/packages/babel-plugin-transform-function-name/package.json
+++ b/packages/babel-plugin-transform-function-name/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-function-name",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Apply ES2015 function.name semantics to all functions",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-function-name",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-function-name": "7.0.0-beta.39"
+    "@babel/helper-function-name": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-function-name/src/index.js b/packages/babel-plugin-transform-function-name/src/index.js
index 27f626a49a0f9..733a56096aaf7 100644
--- a/packages/babel-plugin-transform-function-name/src/index.js
+++ b/packages/babel-plugin-transform-function-name/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import nameFunction from "@babel/helper-function-name";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       FunctionExpression: {
@@ -21,4 +24,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/await/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/await/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/await/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/await/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/await/output.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/await/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/await/output.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/await/output.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-2/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-2/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-2/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-3/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-3/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-3/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-es3/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-es3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-es3/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-es3/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-amd/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-amd/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-amd/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-amd/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-es6/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-es6/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-es6/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-es6/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-es6/output.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-es6/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-es6/output.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-es6/output.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-system/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-system/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-system/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-system/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-system/output.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-system/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-system/output.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-system/output.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-umd/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-umd/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-umd/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming-module-umd/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export-default-arrow-renaming/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/output.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/output.mjs
similarity index 99%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/output.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/output.mjs
index 1fff013ff6639..c686b4d026672 100644
--- a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/output.js
+++ b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/output.mjs
@@ -1,13 +1,14 @@
-export { _whatever as whatever };
-export { _wowzers as default };
 var _foo = "yes",
     foob = "no";
 export { _foo as foo, foob };
 
 function _whatever() {}
 
+export { _whatever as whatever };
+
 function _wowzers() {}
 
+export { _wowzers as default };
 var bar = {
   foo: function foo() {
     _foo;
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-2/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-2/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-2/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-3/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-3/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-3/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-4/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-4/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-4/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-4/output.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-4/output.mjs
similarity index 99%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-4/output.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-4/output.mjs
index 9f010a251925f..8ce7e6c3c46d2 100644
--- a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-4/output.js
+++ b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules-4/output.mjs
@@ -1,7 +1,6 @@
-export { _foo as foo };
-
 function _foo(bar) {}
 
+export { _foo as foo };
 var bar = {
   foo: function foo() {
     _foo;
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/function-name/modules/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/issues/5004/input.js b/packages/babel-plugin-transform-function-name/test/fixtures/issues/5004/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/issues/5004/input.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/issues/5004/input.mjs
diff --git a/packages/babel-plugin-transform-function-name/test/fixtures/issues/5004/output.js b/packages/babel-plugin-transform-function-name/test/fixtures/issues/5004/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-function-name/test/fixtures/issues/5004/output.js
rename to packages/babel-plugin-transform-function-name/test/fixtures/issues/5004/output.mjs
diff --git a/packages/babel-plugin-transform-instanceof/package.json b/packages/babel-plugin-transform-instanceof/package.json
index 02078b0c25ce0..41c7902e366ea 100644
--- a/packages/babel-plugin-transform-instanceof/package.json
+++ b/packages/babel-plugin-transform-instanceof/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-instanceof",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "This plugin transforms all the ES2015 'instanceof' methods",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-instanceof",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-instanceof/src/index.js b/packages/babel-plugin-transform-instanceof/src/index.js
index 4cb516b174291..dc9d402880dcc 100644
--- a/packages/babel-plugin-transform-instanceof/src/index.js
+++ b/packages/babel-plugin-transform-instanceof/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       BinaryExpression(path) {
@@ -25,4 +28,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-jscript/package.json b/packages/babel-plugin-transform-jscript/package.json
index 8aae588da9964..1c83637e0e9f1 100644
--- a/packages/babel-plugin-transform-jscript/package.json
+++ b/packages/babel-plugin-transform-jscript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-jscript",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel plugin to fix buggy JScript named function expressions",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-jscript",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-jscript/src/index.js b/packages/babel-plugin-transform-jscript/src/index.js
index 02a5ddeed9d39..868f94c000ada 100644
--- a/packages/babel-plugin-transform-jscript/src/index.js
+++ b/packages/babel-plugin-transform-jscript/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       FunctionExpression: {
@@ -25,4 +28,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-literals/package.json b/packages/babel-plugin-transform-literals/package.json
index f768961fa5e47..ad764cf9f8fbd 100644
--- a/packages/babel-plugin-transform-literals/package.json
+++ b/packages/babel-plugin-transform-literals/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-literals",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 unicode string and number literals to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-literals",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-literals/src/index.js b/packages/babel-plugin-transform-literals/src/index.js
index 2d3a30d03dc0a..82c90e8604430 100644
--- a/packages/babel-plugin-transform-literals/src/index.js
+++ b/packages/babel-plugin-transform-literals/src/index.js
@@ -1,4 +1,8 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       NumericLiteral({ node }) {
@@ -16,4 +20,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-member-expression-literals/package.json b/packages/babel-plugin-transform-member-expression-literals/package.json
index 3632d9cae1a07..22e85a7954eb4 100644
--- a/packages/babel-plugin-transform-member-expression-literals/package.json
+++ b/packages/babel-plugin-transform-member-expression-literals/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-member-expression-literals",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Ensure that reserved words are quoted in property accesses",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-member-expression-literals",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-member-expression-literals/src/index.js b/packages/babel-plugin-transform-member-expression-literals/src/index.js
index 1358af8114730..d31b955247f40 100644
--- a/packages/babel-plugin-transform-member-expression-literals/src/index.js
+++ b/packages/babel-plugin-transform-member-expression-literals/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       MemberExpression: {
@@ -19,4 +22,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-modules-amd/package.json b/packages/babel-plugin-transform-modules-amd/package.json
index e3df229b244b0..f91f087a398e6 100644
--- a/packages/babel-plugin-transform-modules-amd/package.json
+++ b/packages/babel-plugin-transform-modules-amd/package.json
@@ -1,21 +1,22 @@
 {
   "name": "@babel/plugin-transform-modules-amd",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "This plugin transforms ES2015 modules to AMD",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-modules-amd",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-module-transforms": "7.0.0-beta.39"
+    "@babel/helper-module-transforms": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "keywords": [
     "babel-plugin"
   ],
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-modules-amd/src/index.js b/packages/babel-plugin-transform-modules-amd/src/index.js
index fe1744f4b31c4..2bceb843c346c 100644
--- a/packages/babel-plugin-transform-modules-amd/src/index.js
+++ b/packages/babel-plugin-transform-modules-amd/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import {
   isModule,
   rewriteModuleStatementsAndPrepareHeader,
@@ -14,7 +15,9 @@ const buildWrapper = template(`
   })
 `);
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { loose, allowTopLevelThis, strict, strictMode, noInterop } = options;
   return {
     visitor: {
@@ -97,4 +100,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-10/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-10/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-10/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-10/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-2/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-2/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-3/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-3/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-4/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-4/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-5/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-5/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-6/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-6/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-6/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-6/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-7/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-7/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-7/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-7/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-8/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-8/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-8/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-8/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-9/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-9/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-9/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default-9/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-2/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-2/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-3/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-3/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-4/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-4/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-5/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-5/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-6/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-6/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-6/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from-6/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-from/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-2/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-2/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-3/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-3/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-4/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-4/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-5/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-5/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-specifier-default/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-specifier-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-specifier-default/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/export-specifier-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/exports-variable/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/exports-variable/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/exports-variable/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/exports-variable/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/get-module-name-option/options.json b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/get-module-name-option/options.json
index 6d0cdb5a6f0cc..ef11b00e2ba23 100644
--- a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/get-module-name-option/options.json
+++ b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/get-module-name-option/options.json
@@ -1,4 +1,5 @@
 {
+  "sourceType": "module",
   "moduleIds": true,
   "moduleId": "my custom module name"
 }
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/hoist-function-exports/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/hoist-function-exports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/hoist-function-exports/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/hoist-function-exports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/import-order/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/import-order/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/import-order/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/import-order/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-default/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-default/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-glob/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-glob/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-glob/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-glob/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-mixing/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-mixing/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-mixing/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-mixing/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-named/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-named/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/imports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/module-name/options.json b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/module-name/options.json
index be49a87d0b82f..5b0398abbe6f8 100644
--- a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/module-name/options.json
+++ b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/module-name/options.json
@@ -1,3 +1,4 @@
 {
+  "sourceType": "module",
   "moduleIds": true
 }
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/module-name/output.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/module-name/output.js
index a869bce301008..46d5e5e2744dc 100644
--- a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/module-name/output.js
+++ b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/module-name/output.js
@@ -1,4 +1,4 @@
-define("amd/module-name/output", [], function () {
+define("amd/module-name/input", [], function () {
   "use strict";
 
   foobar();
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/noInterop-export-from/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/noInterop-export-from/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/noInterop-export-from/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/noInterop-export-from/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/noInterop-import-default-only/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/noInterop-import-default-only/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/noInterop-import-default-only/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/noInterop-import-default-only/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/overview/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/overview/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/overview/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/overview/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/remap/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/amd/remap/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/amd/remap/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/amd/remap/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-10/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-10/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-10/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-10/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-2/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-2/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-3/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-3/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-4/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-4/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-5/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-5/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-6/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-6/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-6/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-6/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-7/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-7/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-7/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-7/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-8/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-8/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-8/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-8/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-9/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-9/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-9/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default-9/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-2/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-2/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-3/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-3/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-4/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-4/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-5/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-5/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-6/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-6/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-6/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from-6/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-from/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-2/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-2/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-3/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-3/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-4/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-4/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-5/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-5/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-specifier-default/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-specifier-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-specifier-default/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/export-specifier-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/exports-variable/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/exports-variable/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/exports-variable/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/exports-variable/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/get-module-name-option/options.json b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/get-module-name-option/options.json
index 0b446c533467a..be939b1999ea6 100644
--- a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/get-module-name-option/options.json
+++ b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/get-module-name-option/options.json
@@ -1,4 +1,5 @@
 {
+  "sourceType": "module",
   "moduleIds": true,
   "moduleId": "my custom module name",
   "plugins": [
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/hoist-function-exports/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/hoist-function-exports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/hoist-function-exports/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/hoist-function-exports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/import-order/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/import-order/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/import-order/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/import-order/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-default/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-default/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-glob/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-glob/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-glob/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-glob/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-mixing/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-mixing/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-mixing/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-mixing/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-named/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-named/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/imports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/module-name/options.json b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/module-name/options.json
index 7f54a2b7f9feb..c72a7c5942cc4 100644
--- a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/module-name/options.json
+++ b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/module-name/options.json
@@ -1,4 +1,5 @@
 {
+  "sourceType": "module",
   "moduleIds": true,
   "plugins": [
     "external-helpers",
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/module-name/output.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/module-name/output.js
index 347aadf7a0020..253b4805f7347 100644
--- a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/module-name/output.js
+++ b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/module-name/output.js
@@ -1,4 +1,4 @@
-define("loose/module-name/output", [], function () {
+define("loose/module-name/input", [], function () {
   "use strict";
 
   foobar();
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/noInterop-export-from/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/noInterop-export-from/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/noInterop-export-from/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/noInterop-export-from/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/noInterop-import-default-only/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/noInterop-import-default-only/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/noInterop-import-default-only/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/noInterop-import-default-only/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/overview/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/overview/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/overview/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/overview/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/remap/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/loose/remap/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/loose/remap/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/loose/remap/input.mjs
diff --git a/packages/babel-plugin-transform-modules-amd/test/fixtures/regression/4192/input.js b/packages/babel-plugin-transform-modules-amd/test/fixtures/regression/4192/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-amd/test/fixtures/regression/4192/input.js
rename to packages/babel-plugin-transform-modules-amd/test/fixtures/regression/4192/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/package.json b/packages/babel-plugin-transform-modules-commonjs/package.json
index e2c11f7f97141..a6c90fdfaff1b 100644
--- a/packages/babel-plugin-transform-modules-commonjs/package.json
+++ b/packages/babel-plugin-transform-modules-commonjs/package.json
@@ -1,23 +1,24 @@
 {
   "name": "@babel/plugin-transform-modules-commonjs",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "This plugin transforms ES2015 modules to CommonJS",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-modules-commonjs",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-module-transforms": "7.0.0-beta.39",
-    "@babel/helper-simple-access": "7.0.0-beta.39"
+    "@babel/helper-module-transforms": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/helper-simple-access": "7.0.0-beta.42"
   },
   "keywords": [
     "babel-plugin"
   ],
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39",
-    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42",
+    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-modules-commonjs/src/index.js b/packages/babel-plugin-transform-modules-commonjs/src/index.js
index 30adf43142be4..6bf6ff4829566 100644
--- a/packages/babel-plugin-transform-modules-commonjs/src/index.js
+++ b/packages/babel-plugin-transform-modules-commonjs/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import {
   isModule,
   rewriteModuleStatementsAndPrepareHeader,
@@ -9,9 +10,19 @@ import {
 import simplifyAccess from "@babel/helper-simple-access";
 import { template, types as t } from "@babel/core";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const {
     loose,
+
+    // 'true' for non-mjs files to strictly have .default, instead of having
+    // destructuring-like behavior for their properties.
+    strictNamespace = false,
+
+    // 'true' for mjs files to strictly have .default, instead of having
+    // destructuring-like behavior for their properties.
+    mjsStrictNamespace = true,
     allowTopLevelThis,
     strict,
     strictMode,
@@ -29,9 +40,19 @@ export default function(api, options) {
     throw new Error(`.lazy must be a boolean, array of strings, or a function`);
   }
 
+  if (typeof strictNamespace !== "boolean") {
+    throw new Error(`.strictNamespace must be a boolean, or undefined`);
+  }
+  if (typeof mjsStrictNamespace !== "boolean") {
+    throw new Error(`.mjsStrictNamespace must be a boolean, or undefined`);
+  }
+
   const getAssertion = localName => template.expression.ast`
     (function(){
-      throw new Error("The CommonJS '" + "${localName}" + "' variable is not available in ES6 modules.");
+      throw new Error(
+        "The CommonJS '" + "${localName}" + "' variable is not available in ES6 modules." +
+        "Consider setting setting sourceType:script or sourceType:unambiguous in your " +
+        "Babel config for this file.");
     })()
   `;
 
@@ -97,10 +118,8 @@ export default function(api, options) {
   return {
     visitor: {
       Program: {
-        exit(path) {
-          // For now this requires unambiguous rather that just sourceType
-          // because Babel currently parses all files as sourceType:module.
-          if (!isModule(path, true /* requireUnambiguous */)) return;
+        exit(path, state) {
+          if (!isModule(path)) return;
 
           // Rename the bindings auto-injected into the scope so there is no
           // risk of conflict between the bindings.
@@ -133,6 +152,11 @@ export default function(api, options) {
               allowTopLevelThis,
               noInterop,
               lazy,
+              esNamespaceOnly:
+                typeof state.filename === "string" &&
+                /\.mjs$/.test(state.filename)
+                  ? mjsStrictNamespace
+                  : strictNamespace,
             },
           );
 
@@ -178,4 +202,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/copied-nodes.js b/packages/babel-plugin-transform-modules-commonjs/test/copied-nodes.js
index 4bdcaa89531e2..f28341da50598 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/copied-nodes.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/copied-nodes.js
@@ -5,6 +5,7 @@ test("Doesn't use the same object for two different nodes in the AST", function(
   const code = 'import Foo from "bar"; Foo; Foo;';
 
   const ast = babel.transform(code, {
+    ast: true,
     plugins: [[require("../"), { loose: true }]],
   }).ast;
 
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/auxiliary-comment/overview/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/auxiliary-comment/overview/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/auxiliary-comment/overview/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/auxiliary-comment/overview/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/auxiliary-comment/overview/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/auxiliary-comment/overview/output.js
index 5ce6650470687..dfa19a51ab031 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/auxiliary-comment/overview/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/auxiliary-comment/overview/output.js
@@ -31,7 +31,7 @@ _foo2 = babelHelpers.interopRequireDefault(require("foo2"))
 
 var
 /*before*/
-foo2 = babelHelpers.interopRequireWildcard(require("foo3"))
+foo2 = babelHelpers.interopRequireDefault(require("foo3"))
 /*after*/
 ;
 
@@ -61,25 +61,49 @@ exports.test2 = test2;
 /*after*/
 
 /*before*/
-(0, _foo4.bar)
+(0,
+/*after*/
+
+/*before*/
+_foo4
+/*after*/
+.
+/*before*/
+bar)
 /*after*/
 (
 /*before*/
-_foo2.default
+_foo2
+/*after*/
+.
+/*before*/
+default
 /*after*/
 ,
 /*before*/
-_foo5.foo
+_foo5
+/*after*/
+.
+/*before*/
+foo
 /*after*/
 );
 /* my comment */
 
 /*before*/
-_foo5.foo
+_foo5
+/*after*/
+.
+/*before*/
+foo
 /*after*/
 ;
 
 /*before*/
-_foo2.default
+_foo2
+/*after*/
+.
+/*before*/
+default
 /*after*/
 ;
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/disable-strict-mode/strictMode-false/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/disable-strict-mode/strictMode-false/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/disable-strict-mode/strictMode-false/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/disable-strict-mode/strictMode-false/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-10/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-10/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-10/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-10/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-11/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-11/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-11/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-11/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-2/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-2/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-3/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-3/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-4/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-4/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-5/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-5/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-6/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-6/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-6/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-6/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-7/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-7/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-7/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-7/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-8/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-8/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-8/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-8/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-9/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-9/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-9/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default-9/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-destructured/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-destructured/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-destructured/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-destructured/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-2/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-2/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-3/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-3/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-4/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-4/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-5/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-5/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-6/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-6/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-6/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-6/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-7/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-7/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-7/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-7/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-8/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-8/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-8/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from-8/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-from/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-2/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-2/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-3/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-3/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-4/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-4/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-5/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-5/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/export-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/exports-variable/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/exports-variable/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/exports-variable/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/exports-variable/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/hoist-function-exports/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/hoist-function-exports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/hoist-function-exports/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/hoist-function-exports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/illegal-export-esmodule-2/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/illegal-export-esmodule-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/illegal-export-esmodule-2/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/illegal-export-esmodule-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/illegal-export-esmodule/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/illegal-export-esmodule/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/illegal-export-esmodule/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/illegal-export-esmodule/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-default/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-default/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-hoisting/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-hoisting/output.js
index f88741ee450f2..f3ae7f097128e 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-hoisting/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-hoisting/output.js
@@ -1,5 +1,9 @@
-var _taggedTemplateLiteral = require("@babel/runtime/helpers/taggedTemplateLiteral");
+"use strict";
 
-var _templateObject = /*#__PURE__*/ _taggedTemplateLiteral(["foo"], ["foo"]);
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+var _taggedTemplateLiteral2 = _interopRequireDefault(require("@babel/runtime/helpers/taggedTemplateLiteral"));
+
+var _templateObject = /*#__PURE__*/ (0, _taggedTemplateLiteral2.default)(["foo"]);
 
 tag(_templateObject);
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-named/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-named/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-ordering/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-ordering/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-ordering/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports-ordering/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/imports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/module-shadow/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/module-shadow/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/module-shadow/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/module-shadow/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/multi-load/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/multi-load/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/multi-load/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/multi-load/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/options.json b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/options.json
index 4a31dd9de28f2..0f456743bc929 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/options.json
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/options.json
@@ -1,4 +1,5 @@
 {
+  "sourceType": "module",
   "plugins": [
     "external-helpers",
     ["transform-modules-commonjs", { "loose": true }]
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/remap/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/remap/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/remap/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop-loose/remap/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-10/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-10/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-10/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-10/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-11/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-11/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-11/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-11/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-2/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-2/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-3/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-3/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-4/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-4/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-5/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-5/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-6/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-6/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-6/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-6/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-7/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-7/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-7/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-7/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-8/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-8/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-8/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-8/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-9/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-9/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-9/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default-9/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-destructured/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-destructured/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-destructured/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-destructured/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-2/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-2/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-3/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-3/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-4/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-4/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-5/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-5/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-6/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-6/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-6/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-6/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-7/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-7/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-7/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-7/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-8/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-8/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-8/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from-8/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-from/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-2/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-2/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-3/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-3/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-4/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-4/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-5/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-5/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/export-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/exports-variable/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/exports-variable/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/exports-variable/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/exports-variable/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/hoist-function-exports/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/hoist-function-exports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/hoist-function-exports/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/hoist-function-exports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/illegal-export-esmodule-2/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/illegal-export-esmodule-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/illegal-export-esmodule-2/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/illegal-export-esmodule-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/illegal-export-esmodule/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/illegal-export-esmodule/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/illegal-export-esmodule/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/illegal-export-esmodule/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-default/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-default/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-hoisting/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-hoisting/output.js
index f88741ee450f2..f3ae7f097128e 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-hoisting/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-hoisting/output.js
@@ -1,5 +1,9 @@
-var _taggedTemplateLiteral = require("@babel/runtime/helpers/taggedTemplateLiteral");
+"use strict";
 
-var _templateObject = /*#__PURE__*/ _taggedTemplateLiteral(["foo"], ["foo"]);
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+var _taggedTemplateLiteral2 = _interopRequireDefault(require("@babel/runtime/helpers/taggedTemplateLiteral"));
+
+var _templateObject = /*#__PURE__*/ (0, _taggedTemplateLiteral2.default)(["foo"]);
 
 tag(_templateObject);
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-named/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-named/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-ordering/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-ordering/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-ordering/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports-ordering/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/imports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/module-shadow/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/module-shadow/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/module-shadow/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/module-shadow/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/multi-load/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/multi-load/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/multi-load/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/multi-load/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/options.json b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/options.json
index e38115115dca1..47d0b962b92f3 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/options.json
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/options.json
@@ -1,3 +1,4 @@
 {
+  "sourceType": "module",
   "plugins": ["external-helpers", "transform-modules-commonjs"]
 }
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/remap/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/remap/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/remap/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/interop/remap/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-default/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-default/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-named/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-named/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-namespace/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-namespace/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-namespace/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-namespace/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-namespace/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-namespace/output.js
index e720a87205fbd..ef26faaebcf22 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-namespace/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/import-namespace/output.js
@@ -1,7 +1,7 @@
 "use strict";
 
 function foo() {
-  const data = babelHelpers.interopRequireWildcard(require("foo"));
+  const data = babelHelpers.interopRequireDefault(require("foo"));
 
   foo = function () {
     return data;
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-all/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-all/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-all/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-all/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-default/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-default/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-named/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-named/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-namespace/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-namespace/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-namespace/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-namespace/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-namespace/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-namespace/output.js
index 239f67e25a871..cb6dab1f41627 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-namespace/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/reexport-namespace/output.js
@@ -6,7 +6,7 @@ Object.defineProperty(exports, "__esModule", {
 exports.namespace = void 0;
 
 function namespace() {
-  const data = babelHelpers.interopRequireWildcard(require("foo"));
+  const data = babelHelpers.interopRequireDefault(require("foo"));
 
   namespace = function () {
     return data;
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/sideeffect/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/sideeffect/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/sideeffect/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-dep/sideeffect/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-default/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-default/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-named/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-named/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-namespace/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-namespace/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-namespace/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-namespace/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-namespace/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-namespace/output.js
index d041921ee450e..ffdc4d8163469 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-namespace/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/import-namespace/output.js
@@ -1,4 +1,4 @@
 "use strict";
 
-var foo = babelHelpers.interopRequireWildcard(require("./foo"));
+var foo = babelHelpers.interopRequireDefault(require("./foo"));
 console.log(foo);
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-all/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-all/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-all/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-all/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-default/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-default/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-named/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-named/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-namespace/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-namespace/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-namespace/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-namespace/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-namespace/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-namespace/output.js
index 6aad5e4726b74..82e3c24904e18 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-namespace/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/reexport-namespace/output.js
@@ -4,5 +4,5 @@ Object.defineProperty(exports, "__esModule", {
   value: true
 });
 exports.namespace = void 0;
-var namespace = babelHelpers.interopRequireWildcard(require("./foo"));
+var namespace = babelHelpers.interopRequireDefault(require("./foo"));
 exports.namespace = namespace;
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/sideeffect/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/sideeffect/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/sideeffect/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-local/sideeffect/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-default/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-default/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-named/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-named/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-namespace/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-namespace/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-namespace/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-namespace/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-namespace/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-namespace/output.js
index 703d0cdd86d90..848b8cb1d317c 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-namespace/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/import-namespace/output.js
@@ -1,9 +1,9 @@
 "use strict";
 
-var foo1 = babelHelpers.interopRequireWildcard(require("white"));
+var foo1 = babelHelpers.interopRequireDefault(require("white"));
 
 function foo2() {
-  const data = babelHelpers.interopRequireWildcard(require("black"));
+  const data = babelHelpers.interopRequireDefault(require("black"));
 
   foo2 = function () {
     return data;
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-all/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-all/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-all/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-all/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-default/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-default/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-named/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-named/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-namespace/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-namespace/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-namespace/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-namespace/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-namespace/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-namespace/output.js
index 7e52454406e74..999143700b192 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-namespace/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/reexport-namespace/output.js
@@ -4,11 +4,11 @@ Object.defineProperty(exports, "__esModule", {
   value: true
 });
 exports.namespace2 = exports.namespace1 = void 0;
-var namespace1 = babelHelpers.interopRequireWildcard(require("white"));
+var namespace1 = babelHelpers.interopRequireDefault(require("white"));
 exports.namespace1 = namespace1;
 
 function namespace2() {
-  const data = babelHelpers.interopRequireWildcard(require("black"));
+  const data = babelHelpers.interopRequireDefault(require("black"));
 
   namespace2 = function () {
     return data;
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/sideeffect/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/sideeffect/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/sideeffect/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/lazy-whitelist/sideeffect/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/exec.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/exec.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/exec.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/exec.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/options.json b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/options.json
new file mode 100644
index 0000000000000..fd06b45cf2e4e
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters-star/options.json
@@ -0,0 +1,5 @@
+{
+  "plugins": [
+    ["transform-modules-commonjs", { "mjsStrictNamespace": false }]
+  ]
+}
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/exec.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/exec.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/exec.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/exec.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/output.js
index c545f5310d856..721f9af381e82 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/copy-getters-setters/output.js
@@ -16,6 +16,6 @@ Object.defineProperty(exports, "baz", {
   }
 });
 
-var _moduleWithGetter = _interopRequireWildcard(require("./moduleWithGetter"));
+var _moduleWithGetter = _interopRequireDefault(require("./moduleWithGetter"));
 
-function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/import-const-throw/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/import-const-throw/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/import-const-throw/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/import-const-throw/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/import-const-throw/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/import-const-throw/output.js
index 2433845dbdc23..7b05f0c824580 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/import-const-throw/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/import-const-throw/output.js
@@ -2,12 +2,10 @@
 
 var _foo = _interopRequireDefault(require("foo"));
 
-var Bar = _interopRequireWildcard(require("bar"));
+var Bar = _interopRequireDefault(require("bar"));
 
 var _baz = require("baz");
 
-function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
-
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
 _foo.default = (42, function () {
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/local-exports-decl/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/local-exports-decl/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/local-exports-decl/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/local-exports-decl/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/module-exports/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/module-exports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/module-exports/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/module-exports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/module-exports/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/module-exports/output.js
index e1138b612d84b..3e9254c59bf29 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/module-exports/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/module-exports/output.js
@@ -3,56 +3,56 @@
 require("foo");
 
 console.log(function () {
-  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }());
 console.log(function () {
-  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }().prop);
 
 exports = function () {
-  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }() + 1;
 
 exports = function () {
-  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }() + 4;
 
 ({
   exports
 } = ({}, function () {
-  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }()));
 [exports] = ([], function () {
-  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }());
 exports = {};
 (function () {
-  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "exports" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 })().prop = "";
 console.log(function () {
-  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }());
 console.log(function () {
-  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }().exports);
 
 module = function () {
-  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }() + 1;
 
 module = function () {
-  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }() + 4;
 
 ({
   module
 } = ({}, function () {
-  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }()));
 [module] = ([], function () {
-  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 }());
 module = {};
 (function () {
-  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules.");
+  throw new Error("The CommonJS '" + "module" + "' variable is not available in ES6 modules." + "Consider setting setting sourceType:script or sourceType:unambiguous in your " + "Babel config for this file.");
 })().prop = "";
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/input.mjs b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/input.mjs
new file mode 100644
index 0000000000000..b85fcb659efb6
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/input.mjs
@@ -0,0 +1,14 @@
+import aDefault from "one";
+import { aNamed } from "two";
+import { orig as anAliased } from "three";
+import * as aNamespace from "four";
+
+console.log(aDefault);
+console.log(aNamed);
+console.log(anAliased);
+console.log(aNamespace);
+
+console.log(aDefault());
+console.log(aNamed());
+console.log(anAliased());
+console.log(aNamespace());
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/options.json b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/options.json
new file mode 100644
index 0000000000000..e38115115dca1
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers", "transform-modules-commonjs"]
+}
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/output.js
new file mode 100644
index 0000000000000..c40ee11036e2b
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/output.js
@@ -0,0 +1,17 @@
+"use strict";
+
+var _one = babelHelpers.interopRequireDefault(require("one"));
+
+var _two = require("two");
+
+var _three = require("three");
+
+var aNamespace = babelHelpers.interopRequireDefault(require("four"));
+console.log(_one.default);
+console.log(_two.aNamed);
+console.log(_three.orig);
+console.log(aNamespace);
+console.log((0, _one.default)());
+console.log((0, _two.aNamed)());
+console.log((0, _three.orig)());
+console.log(aNamespace());
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/source-mappings.json b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/source-mappings.json
new file mode 100644
index 0000000000000..c26d511a52a02
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/source-mappings.json
@@ -0,0 +1,162 @@
+[
+  {
+    "generated": {
+      "line": 10,
+      "column": 12
+    },
+    "original": {
+      "line": 6,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 10,
+      "column": 23
+    },
+    "original": {
+      "line": 6,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 11,
+      "column": 12
+    },
+    "original": {
+      "line": 7,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 11,
+      "column": 22
+    },
+    "original": {
+      "line": 7,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 12,
+      "column": 12
+    },
+    "original": {
+      "line": 8,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 12,
+      "column": 22
+    },
+    "original": {
+      "line": 8,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 13,
+      "column": 12
+    },
+    "original": {
+      "line": 9,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 13,
+      "column": 21
+    },
+    "original": {
+      "line": 9,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 14,
+      "column": 16
+    },
+    "original": {
+      "line": 11,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 14,
+      "column": 27
+    },
+    "original": {
+      "line": 11,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 15,
+      "column": 16
+    },
+    "original": {
+      "line": 12,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 15,
+      "column": 26
+    },
+    "original": {
+      "line": 12,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 16,
+      "column": 16
+    },
+    "original": {
+      "line": 13,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 16,
+      "column": 26
+    },
+    "original": {
+      "line": 13,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 17,
+      "column": 12
+    },
+    "original": {
+      "line": 14,
+      "column": 12
+    }
+  },
+  {
+    "generated": {
+      "line": 17,
+      "column": 21
+    },
+    "original": {
+      "line": 14,
+      "column": 12
+    }
+  }
+]
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/export-from/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/export-from/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/export-from/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/export-from/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/import-default-only/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/import-default-only/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/import-default-only/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/import-default-only/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/import-wildcard/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/import-wildcard/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/import-wildcard/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/noInterop/import-wildcard/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/4462-T7565/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/4462-T7565/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/4462-T7565/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/4462-T7565/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7160/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7160/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7160/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7160/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7165/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7165/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7165/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7165/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7199/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7199/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7199/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7199/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7199/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7199/output.js
index 47c956825184e..563d49889bffa 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7199/output.js
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7199/output.js
@@ -4,9 +4,13 @@ var _foo = _interopRequireDefault(require("foo"));
 
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
 
-function _sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
+function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }
 
-function _slicedToArray(arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return _sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }
+function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }
+
+function _iterableToArrayLimit(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
+
+function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
 
 const _bar = bar,
       _bar2 = _slicedToArray(_bar, 1),
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7272/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7272/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7272/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/T7272/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-class/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-class/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-class/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-class/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-function/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-function/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-function/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-function/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-named-class/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-named-class/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-named-class/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-named-class/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-named-function/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-named-function/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-named-function/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility-named-function/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/es3-compatibility/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/lazy-7176/input.mjs b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/lazy-7176/input.mjs
new file mode 100644
index 0000000000000..b6c0b8c947463
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/lazy-7176/input.mjs
@@ -0,0 +1,5 @@
+import * as mod from "mod";
+import { named } from "mod";
+
+named;
+mod;
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/lazy-7176/options.json b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/lazy-7176/options.json
new file mode 100644
index 0000000000000..4d4cb95420155
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/lazy-7176/options.json
@@ -0,0 +1,6 @@
+{
+  "plugins": [
+    ["transform-modules-commonjs", {"lazy": true}],
+    "external-helpers"
+  ]
+}
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/lazy-7176/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/lazy-7176/output.js
new file mode 100644
index 0000000000000..7ed4c7dfaf61b
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/regression/lazy-7176/output.js
@@ -0,0 +1,14 @@
+"use strict";
+
+function mod() {
+  const data = babelHelpers.interopRequireDefault(require("mod"));
+
+  mod = function () {
+    return data;
+  };
+
+  return data;
+}
+
+mod().named;
+mod();
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-1/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-1/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-1/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-1/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-2/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-2/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-2/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-3/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-3/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-3/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-3/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-all/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-all/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-all/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-all/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array-default-params/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array-default-params/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array-default-params/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array-default-params/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array-rest/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array-rest/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array-rest/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array-rest/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-array/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-deep/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-deep/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-deep/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-deep/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-default-params/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-default-params/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-default-params/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-default-params/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-rest/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-rest/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-rest/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object-rest/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export-const-destructuring-object/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/export/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/import-wildcard/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/import-wildcard/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/import-wildcard/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/import-wildcard/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/import/input.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/import/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/import/input.js
rename to packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/import/input.mjs
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/options.json b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/options.json
index 4b1163fa6190a..1654d4e359bd3 100644
--- a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/options.json
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/strict/options.json
@@ -2,6 +2,6 @@
   "plugins": [
     "external-helpers",
     "syntax-object-rest-spread",
-    ["transform-modules-commonjs", { "strict": true }]
+    ["transform-modules-commonjs", { "strict": true, "mjsStrictNamespace": false }]
   ]
 }
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/negative-suffix/input.mjs b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/negative-suffix/input.mjs
new file mode 100644
index 0000000000000..4b99ecd9c235a
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/negative-suffix/input.mjs
@@ -0,0 +1,7 @@
+export let diffLevel = 0;
+
+export function diff() {
+  if (!--diffLevel) {
+    console.log("hey");
+  }
+}
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/negative-suffix/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/negative-suffix/output.js
new file mode 100644
index 0000000000000..c881117d50d58
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/negative-suffix/output.js
@@ -0,0 +1,15 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.diff = diff;
+exports.diffLevel = void 0;
+let diffLevel = 0;
+exports.diffLevel = diffLevel;
+
+function diff() {
+  if (!(exports.diffLevel = diffLevel = diffLevel - 1)) {
+    console.log("hey");
+  }
+}
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/options.json b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/options.json
new file mode 100644
index 0000000000000..ab27afaee30bf
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers", ["transform-modules-commonjs"]]
+}
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/positive-suffix/input.mjs b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/positive-suffix/input.mjs
new file mode 100644
index 0000000000000..a815395f6a897
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/positive-suffix/input.mjs
@@ -0,0 +1,7 @@
+export let diffLevel = 0;
+
+export function diff() {
+  if (!++diffLevel) {
+    console.log("hey");
+  }
+}
diff --git a/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/positive-suffix/output.js b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/positive-suffix/output.js
new file mode 100644
index 0000000000000..6fd88b919dac4
--- /dev/null
+++ b/packages/babel-plugin-transform-modules-commonjs/test/fixtures/update-expression/positive-suffix/output.js
@@ -0,0 +1,15 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.diff = diff;
+exports.diffLevel = void 0;
+let diffLevel = 0;
+exports.diffLevel = diffLevel;
+
+function diff() {
+  if (!(exports.diffLevel = diffLevel = diffLevel + 1)) {
+    console.log("hey");
+  }
+}
diff --git a/packages/babel-plugin-transform-modules-systemjs/package.json b/packages/babel-plugin-transform-modules-systemjs/package.json
index d9f40286edf8e..fd67ccc75bddb 100644
--- a/packages/babel-plugin-transform-modules-systemjs/package.json
+++ b/packages/babel-plugin-transform-modules-systemjs/package.json
@@ -1,22 +1,23 @@
 {
   "name": "@babel/plugin-transform-modules-systemjs",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "This plugin transforms ES2015 modules to SystemJS",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-modules-systemjs",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-hoist-variables": "7.0.0-beta.39"
+    "@babel/helper-hoist-variables": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "keywords": [
     "babel-plugin"
   ],
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39",
-    "@babel/plugin-syntax-dynamic-import": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42",
+    "@babel/plugin-syntax-dynamic-import": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-modules-systemjs/src/index.js b/packages/babel-plugin-transform-modules-systemjs/src/index.js
index 73f62f5cad218..a323250359188 100644
--- a/packages/babel-plugin-transform-modules-systemjs/src/index.js
+++ b/packages/babel-plugin-transform-modules-systemjs/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import hoistVariables from "@babel/helper-hoist-variables";
 import { template, types as t } from "@babel/core";
 
@@ -22,7 +23,9 @@ const buildExportAll = template(`
 
 const TYPE_IMPORT = "Import";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { systemGlobal = "System" } = options;
   const IGNORE_REASSIGNMENT_SYMBOL = Symbol();
 
@@ -407,4 +410,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
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rename from packages/babel-plugin-transform-modules-systemjs/test/fixtures/systemjs/overview/output.js
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diff --git a/packages/babel-plugin-transform-modules-systemjs/test/fixtures/systemjs/remap/input.js b/packages/babel-plugin-transform-modules-systemjs/test/fixtures/systemjs/remap/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-systemjs/test/fixtures/systemjs/remap/input.js
rename to packages/babel-plugin-transform-modules-systemjs/test/fixtures/systemjs/remap/input.mjs
diff --git a/packages/babel-plugin-transform-modules-systemjs/test/fixtures/systemjs/remap/output.js b/packages/babel-plugin-transform-modules-systemjs/test/fixtures/systemjs/remap/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-systemjs/test/fixtures/systemjs/remap/output.js
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diff --git a/packages/babel-plugin-transform-modules-umd/package.json b/packages/babel-plugin-transform-modules-umd/package.json
index e458c8c0ac400..65e4c70b030f8 100644
--- a/packages/babel-plugin-transform-modules-umd/package.json
+++ b/packages/babel-plugin-transform-modules-umd/package.json
@@ -1,21 +1,22 @@
 {
   "name": "@babel/plugin-transform-modules-umd",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "This plugin transforms ES2015 modules to UMD",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-modules-umd",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-module-transforms": "7.0.0-beta.39"
+    "@babel/helper-module-transforms": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "keywords": [
     "babel-plugin"
   ],
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-modules-umd/src/index.js b/packages/babel-plugin-transform-modules-umd/src/index.js
index 15b69ebd0655d..0e7979d9c8b44 100644
--- a/packages/babel-plugin-transform-modules-umd/src/index.js
+++ b/packages/babel-plugin-transform-modules-umd/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { basename, extname } from "path";
 import {
   isModule,
@@ -30,7 +31,9 @@ const buildWrapper = template(`
   })
 `);
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const {
     globals,
     exactGlobals,
@@ -225,4 +228,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named-4/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named-4/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named-4/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named-5/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named-5/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/export-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/exports-variable/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/exports-variable/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/exports-variable/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/exports-variable/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/get-module-name-option/options.json b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/get-module-name-option/options.json
index fd01b12b80a53..b053905b03a9b 100644
--- a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/get-module-name-option/options.json
+++ b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/get-module-name-option/options.json
@@ -1,4 +1,5 @@
 {
+  "sourceType": "module",
   "moduleIds": true,
   "moduleId": "my custom module name",
   "plugins": [
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/hoist-function-exports/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/hoist-function-exports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/hoist-function-exports/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/hoist-function-exports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-default/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-default/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-false-with-overrides/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-false-with-overrides/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-false-with-overrides/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-false-with-overrides/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-false/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-false/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-false/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-false/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-true-with-overrides/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-true-with-overrides/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-true-with-overrides/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-true-with-overrides/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-true/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-true/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-true/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-exact-globals-true/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-glob/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-glob/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-glob/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-glob/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-mixing/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-mixing/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-mixing/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-mixing/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-named/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-named/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/imports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global-in-namespace/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global-in-namespace/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global-in-namespace/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global-in-namespace/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global-in-very-nested-namespace/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global-in-very-nested-namespace/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global-in-very-nested-namespace/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global-in-very-nested-namespace/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id-with-overridden-global/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id/options.json b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id/options.json
index bf41ea5a3fbe5..895e18b863604 100644
--- a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id/options.json
+++ b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-id/options.json
@@ -1,4 +1,5 @@
 {
+  "sourceType": "module",
   "moduleId": "MyLib",
   "plugins": [
     "external-helpers",
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name-with-overridden-global/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name-with-overridden-global/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name-with-overridden-global/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name-with-overridden-global/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name-with-overridden-global/output.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name-with-overridden-global/output.js
index 0bc010d814c4f..516c1e9a10c07 100644
--- a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name-with-overridden-global/output.js
+++ b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name-with-overridden-global/output.js
@@ -1,6 +1,6 @@
 (function (global, factory) {
   if (typeof define === "function" && define.amd) {
-    define("loose/module-name-with-overridden-global/output", ["exports"], factory);
+    define("loose/module-name-with-overridden-global/input", ["exports"], factory);
   } else if (typeof exports !== "undefined") {
     factory(exports);
   } else {
@@ -8,7 +8,7 @@
       exports: {}
     };
     factory(mod.exports);
-    global.looseModuleNameWithOverriddenGlobalOutput = mod.exports;
+    global.looseModuleNameWithOverriddenGlobalInput = mod.exports;
   }
 })(this, function (_exports) {
   "use strict";
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name/options.json b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name/options.json
index 050e3555fd00a..ab68188b076ce 100644
--- a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name/options.json
+++ b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name/options.json
@@ -1,4 +1,5 @@
 {
+  "sourceType": "module",
   "moduleIds": true,
   "plugins": [
     "external-helpers",
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name/output.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name/output.js
index 31d43cd38b719..37b3679166223 100644
--- a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name/output.js
+++ b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/module-name/output.js
@@ -1,6 +1,6 @@
 (function (global, factory) {
   if (typeof define === "function" && define.amd) {
-    define("loose/module-name/output", [], factory);
+    define("loose/module-name/input", [], factory);
   } else if (typeof exports !== "undefined") {
     factory();
   } else {
@@ -8,7 +8,7 @@
       exports: {}
     };
     factory();
-    global.looseModuleNameOutput = mod.exports;
+    global.looseModuleNameInput = mod.exports;
   }
 })(this, function () {
   "use strict";
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/non-default-imports/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/non-default-imports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/non-default-imports/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/non-default-imports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/override-export-name/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/override-export-name/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/override-export-name/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/override-export-name/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/override-import-name/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/override-import-name/input.mjs
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rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/override-import-name/input.js
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/overview/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/overview/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/overview/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/overview/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/remap/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/loose/remap/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/loose/remap/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/loose/remap/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/regression/4192/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/regression/4192/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/regression/4192/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/regression/4192/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-10/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-10/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-10/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-10/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-11/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-11/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-2/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-2/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-3/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-3/input.mjs
similarity index 100%
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-4/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-4/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-5/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-5/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-6/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-6/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-7/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-7/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-8/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-8/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-9/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default-9/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-default/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from-2/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from-2/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from-3/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from-3/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from-4/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from-4/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from-5/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from-5/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from-6/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from-6/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-from/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-2/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-2/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-3/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-3/input.mjs
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diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-4/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-4/input.mjs
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rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-4/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-4/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-5/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-5/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-5/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named-5/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/export-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/exports-variable/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/exports-variable/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/exports-variable/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/exports-variable/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/get-module-name-option/options.json b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/get-module-name-option/options.json
index 6d0cdb5a6f0cc..ef11b00e2ba23 100644
--- a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/get-module-name-option/options.json
+++ b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/get-module-name-option/options.json
@@ -1,4 +1,5 @@
 {
+  "sourceType": "module",
   "moduleIds": true,
   "moduleId": "my custom module name"
 }
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/hoist-function-exports/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/hoist-function-exports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/hoist-function-exports/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/hoist-function-exports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-default/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-default/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-default/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-false-with-overrides/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-false-with-overrides/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-false-with-overrides/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-false-with-overrides/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-false/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-false/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-false/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-false/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-true-with-overrides/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-true-with-overrides/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-true-with-overrides/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-true-with-overrides/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-true/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-true/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-true/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-exact-globals-true/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-glob/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-glob/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-glob/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-glob/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-mixing/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-mixing/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-mixing/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-mixing/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-named/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-named/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-named/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports-named/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/imports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global-in-namespace/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global-in-namespace/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global-in-namespace/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global-in-namespace/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global-in-very-nested-namespace/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global-in-very-nested-namespace/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global-in-very-nested-namespace/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global-in-very-nested-namespace/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id-with-overridden-global/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id/options.json b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id/options.json
index 921ceb966006f..48a14ad305b94 100644
--- a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id/options.json
+++ b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-id/options.json
@@ -1,3 +1,4 @@
 {
+  "sourceType": "module",
   "moduleId": "MyLib"
 }
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name-with-overridden-global/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name-with-overridden-global/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name-with-overridden-global/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name-with-overridden-global/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name-with-overridden-global/output.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name-with-overridden-global/output.js
index f72bc963fe2aa..b17d582429ed7 100644
--- a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name-with-overridden-global/output.js
+++ b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name-with-overridden-global/output.js
@@ -1,6 +1,6 @@
 (function (global, factory) {
   if (typeof define === "function" && define.amd) {
-    define("umd/module-name-with-overridden-global/output", ["exports"], factory);
+    define("umd/module-name-with-overridden-global/input", ["exports"], factory);
   } else if (typeof exports !== "undefined") {
     factory(exports);
   } else {
@@ -8,7 +8,7 @@
       exports: {}
     };
     factory(mod.exports);
-    global.umdModuleNameWithOverriddenGlobalOutput = mod.exports;
+    global.umdModuleNameWithOverriddenGlobalInput = mod.exports;
   }
 })(this, function (_exports) {
   "use strict";
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name/options.json b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name/options.json
index be49a87d0b82f..5b0398abbe6f8 100644
--- a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name/options.json
+++ b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name/options.json
@@ -1,3 +1,4 @@
 {
+  "sourceType": "module",
   "moduleIds": true
 }
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name/output.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name/output.js
index e18249884879b..3967f520001cb 100644
--- a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name/output.js
+++ b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/module-name/output.js
@@ -1,6 +1,6 @@
 (function (global, factory) {
   if (typeof define === "function" && define.amd) {
-    define("umd/module-name/output", [], factory);
+    define("umd/module-name/input", [], factory);
   } else if (typeof exports !== "undefined") {
     factory();
   } else {
@@ -8,7 +8,7 @@
       exports: {}
     };
     factory();
-    global.umdModuleNameOutput = mod.exports;
+    global.umdModuleNameInput = mod.exports;
   }
 })(this, function () {
   "use strict";
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/non-default-imports/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/non-default-imports/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/non-default-imports/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/non-default-imports/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/override-export-name/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/override-export-name/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/override-export-name/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/override-export-name/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/override-import-name/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/override-import-name/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/override-import-name/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/override-import-name/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/overview/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/overview/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/overview/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/overview/input.mjs
diff --git a/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/remap/input.js b/packages/babel-plugin-transform-modules-umd/test/fixtures/umd/remap/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-modules-umd/test/fixtures/umd/remap/input.js
rename to packages/babel-plugin-transform-modules-umd/test/fixtures/umd/remap/input.mjs
diff --git a/packages/babel-plugin-transform-new-target/package.json b/packages/babel-plugin-transform-new-target/package.json
index 5d239ae5db8c2..167dc0e8440ac 100644
--- a/packages/babel-plugin-transform-new-target/package.json
+++ b/packages/babel-plugin-transform-new-target/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-new-target",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Transforms new.target meta property",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-new-target",
   "license": "MIT",
@@ -8,13 +8,16 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39",
-    "@babel/plugin-proposal-class-properties": "7.0.0-beta.39",
-    "@babel/plugin-transform-arrow-functions": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42",
+    "@babel/plugin-proposal-class-properties": "7.0.0-beta.42",
+    "@babel/plugin-transform-arrow-functions": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-new-target/src/index.js b/packages/babel-plugin-transform-new-target/src/index.js
index 93825672f611e..162575ecf2274 100644
--- a/packages/babel-plugin-transform-new-target/src/index.js
+++ b/packages/babel-plugin-transform-new-target/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     name: "transform-new-target",
 
@@ -67,4 +70,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-object-assign/package.json b/packages/babel-plugin-transform-object-assign/package.json
index 8e881de940b49..b6b48c9d8fca1 100644
--- a/packages/babel-plugin-transform-object-assign/package.json
+++ b/packages/babel-plugin-transform-object-assign/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-object-assign",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Replace Object.assign with an inline helper",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-object-assign",
   "author": "Jed Watson",
@@ -9,11 +9,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-object-assign/src/index.js b/packages/babel-plugin-transform-object-assign/src/index.js
index 42df9df70a288..856405ce2f250 100644
--- a/packages/babel-plugin-transform-object-assign/src/index.js
+++ b/packages/babel-plugin-transform-object-assign/src/index.js
@@ -1,4 +1,8 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       CallExpression: function(path, file) {
@@ -8,4 +12,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-object-set-prototype-of-to-assign/package.json b/packages/babel-plugin-transform-object-set-prototype-of-to-assign/package.json
index e5ece1e7846c5..f3eda35ba42fc 100644
--- a/packages/babel-plugin-transform-object-set-prototype-of-to-assign/package.json
+++ b/packages/babel-plugin-transform-object-set-prototype-of-to-assign/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-object-set-prototype-of-to-assign",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Turn Object.setPrototypeOf to assignments",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-object-set-prototype-of-to-assign",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-object-set-prototype-of-to-assign/src/index.js b/packages/babel-plugin-transform-object-set-prototype-of-to-assign/src/index.js
index e1a9529c7ce3a..84f4399a978df 100644
--- a/packages/babel-plugin-transform-object-set-prototype-of-to-assign/src/index.js
+++ b/packages/babel-plugin-transform-object-set-prototype-of-to-assign/src/index.js
@@ -1,4 +1,8 @@
-export default function() {
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       CallExpression(path, file) {
@@ -8,4 +12,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-object-super/package.json b/packages/babel-plugin-transform-object-super/package.json
index 2770b8cbac5dc..e5b704af8ef10 100644
--- a/packages/babel-plugin-transform-object-super/package.json
+++ b/packages/babel-plugin-transform-object-super/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-object-super",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 object super to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-object-super",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-replace-supers": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/helper-replace-supers": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-object-super/src/index.js b/packages/babel-plugin-transform-object-super/src/index.js
index e0c6c14cfa6e1..8ba3c588ec765 100644
--- a/packages/babel-plugin-transform-object-super/src/index.js
+++ b/packages/babel-plugin-transform-object-super/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import ReplaceSupers from "@babel/helper-replace-supers";
 import { types as t } from "@babel/core";
 
@@ -14,7 +15,9 @@ function replacePropertySuper(path, node, scope, getObjectRef, file) {
   replaceSupers.replace();
 }
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       ObjectExpression(path, state) {
@@ -47,4 +50,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-parameters/package.json b/packages/babel-plugin-transform-parameters/package.json
index eb3a6e26bcb44..d1cf013fee55b 100644
--- a/packages/babel-plugin-transform-parameters/package.json
+++ b/packages/babel-plugin-transform-parameters/package.json
@@ -1,22 +1,23 @@
 {
   "name": "@babel/plugin-transform-parameters",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 default and rest parameters to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-parameters",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-call-delegate": "7.0.0-beta.39",
-    "@babel/helper-get-function-arity": "7.0.0-beta.39"
+    "@babel/helper-call-delegate": "7.0.0-beta.42",
+    "@babel/helper-get-function-arity": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "keywords": [
     "babel-plugin"
   ],
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-parameters/src/index.js b/packages/babel-plugin-transform-parameters/src/index.js
index 4f66e10ba49fe..733ff830834aa 100644
--- a/packages/babel-plugin-transform-parameters/src/index.js
+++ b/packages/babel-plugin-transform-parameters/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import convertFunctionParams from "./params";
 import convertFunctionRest from "./rest";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { loose } = options;
   return {
     visitor: {
@@ -26,4 +29,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-parameters/test/fixtures/regression/4209/input.js b/packages/babel-plugin-transform-parameters/test/fixtures/regression/4209/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-parameters/test/fixtures/regression/4209/input.js
rename to packages/babel-plugin-transform-parameters/test/fixtures/regression/4209/input.mjs
diff --git a/packages/babel-plugin-transform-parameters/test/fixtures/regression/6057-expanded/input.js b/packages/babel-plugin-transform-parameters/test/fixtures/regression/6057-expanded/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-parameters/test/fixtures/regression/6057-expanded/input.js
rename to packages/babel-plugin-transform-parameters/test/fixtures/regression/6057-expanded/input.mjs
diff --git a/packages/babel-plugin-transform-parameters/test/fixtures/regression/6057-expanded/output.js b/packages/babel-plugin-transform-parameters/test/fixtures/regression/6057-expanded/output.js
index c3554cc0ec248..e113eb30897c7 100644
--- a/packages/babel-plugin-transform-parameters/test/fixtures/regression/6057-expanded/output.js
+++ b/packages/babel-plugin-transform-parameters/test/fixtures/regression/6057-expanded/output.js
@@ -19,7 +19,7 @@ function _defineProperties(target, props) { for (var i = 0; i < props.length; i+
 
 function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
 
 function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
 
diff --git a/packages/babel-plugin-transform-parameters/test/fixtures/use-loose-option/default-assignment-with-types/input.js b/packages/babel-plugin-transform-parameters/test/fixtures/use-loose-option/default-assignment-with-types/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-parameters/test/fixtures/use-loose-option/default-assignment-with-types/input.js
rename to packages/babel-plugin-transform-parameters/test/fixtures/use-loose-option/default-assignment-with-types/input.mjs
diff --git a/packages/babel-plugin-transform-parameters/test/fixtures/use-loose-option/default-assignment-with-types/output.js b/packages/babel-plugin-transform-parameters/test/fixtures/use-loose-option/default-assignment-with-types/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-parameters/test/fixtures/use-loose-option/default-assignment-with-types/output.js
rename to packages/babel-plugin-transform-parameters/test/fixtures/use-loose-option/default-assignment-with-types/output.mjs
diff --git a/packages/babel-plugin-transform-property-literals/package.json b/packages/babel-plugin-transform-property-literals/package.json
index ad39e08b7ae72..f3d8103af6097 100644
--- a/packages/babel-plugin-transform-property-literals/package.json
+++ b/packages/babel-plugin-transform-property-literals/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-property-literals",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Ensure that reserved words are quoted in object property keys",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-property-literals",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-property-literals/src/index.js b/packages/babel-plugin-transform-property-literals/src/index.js
index a8de9f34ca24f..812cf1a3b50d8 100644
--- a/packages/babel-plugin-transform-property-literals/src/index.js
+++ b/packages/babel-plugin-transform-property-literals/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       ObjectProperty: {
@@ -18,4 +21,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-property-mutators/package.json b/packages/babel-plugin-transform-property-mutators/package.json
index cfcf819fa75bc..6017dbd3019e5 100644
--- a/packages/babel-plugin-transform-property-mutators/package.json
+++ b/packages/babel-plugin-transform-property-mutators/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-property-mutators",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES5 property mutator shorthand syntax to Object.defineProperty",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-property-mutators",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-define-map": "7.0.0-beta.39"
+    "@babel/helper-define-map": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-property-mutators/src/index.js b/packages/babel-plugin-transform-property-mutators/src/index.js
index d083dc5439158..6428f9a86227d 100644
--- a/packages/babel-plugin-transform-property-mutators/src/index.js
+++ b/packages/babel-plugin-transform-property-mutators/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import * as defineMap from "@babel/helper-define-map";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       ObjectExpression(path, file) {
@@ -38,4 +41,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-proto-to-assign/package.json b/packages/babel-plugin-transform-proto-to-assign/package.json
index 031d2ad77554e..5cf2274ed9d6b 100644
--- a/packages/babel-plugin-transform-proto-to-assign/package.json
+++ b/packages/babel-plugin-transform-proto-to-assign/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-proto-to-assign",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel plugin for turning __proto__ into a shallow property clone",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-proto-to-assign",
   "license": "MIT",
@@ -9,13 +9,13 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "lodash": "^4.2.0"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-proto-to-assign/src/index.js b/packages/babel-plugin-transform-proto-to-assign/src/index.js
index 09ae0e71e211f..1a8fea57e5f2a 100644
--- a/packages/babel-plugin-transform-proto-to-assign/src/index.js
+++ b/packages/babel-plugin-transform-proto-to-assign/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import pull from "lodash/pull";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   function isProtoKey(node) {
     return t.isLiteral(t.toComputedKey(node, node.key), { value: "__proto__" });
   }
@@ -76,4 +79,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-react-constant-elements/package.json b/packages/babel-plugin-transform-react-constant-elements/package.json
index d2109b24864de..cf9c3a6fe0420 100644
--- a/packages/babel-plugin-transform-react-constant-elements/package.json
+++ b/packages/babel-plugin-transform-react-constant-elements/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-react-constant-elements",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Treat React JSX elements as value types and hoist them to the highest scope",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-react-constant-elements",
   "license": "MIT",
@@ -8,11 +8,15 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-annotate-as-pure": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-react-constant-elements/src/index.js b/packages/babel-plugin-transform-react-constant-elements/src/index.js
index 29c8f7be94a26..70c6fb115be02 100644
--- a/packages/babel-plugin-transform-react-constant-elements/src/index.js
+++ b/packages/babel-plugin-transform-react-constant-elements/src/index.js
@@ -1,6 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
+import annotateAsPure from "@babel/helper-annotate-as-pure";
+
+export default declare((api, options) => {
+  api.assertVersion(7);
 
-export default function transformReactConstantElement(api, options) {
   const { allowMutablePropsOnTags } = options;
 
   if (
@@ -101,9 +105,13 @@ export default function transformReactConstantElement(api, options) {
         path.traverse(immutabilityVisitor, state);
 
         if (state.isImmutable) {
-          path.hoist();
+          const hoisted = path.hoist();
+
+          if (hoisted) {
+            annotateAsPure(hoisted);
+          }
         }
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-2/input.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-2/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-2/input.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-2/input.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-2/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-2/output.mjs
similarity index 71%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-2/output.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-2/output.mjs
index 5f4d4762cf4fe..e44a4b518dc98 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-2/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-2/output.mjs
@@ -1,10 +1,14 @@
-var _ref = <div>child</div>;
+var _ref =
+/*#__PURE__*/
+<div>child</div>;
 
 const AppItem = () => {
   return _ref;
 };
 
-var _ref2 = <div>
+var _ref2 =
+/*#__PURE__*/
+<div>
         <p>Parent</p>
         <AppItem />
       </div>;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-3/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-3/output.js
index 5b5fdfbf7731d..602d3eb3b1842 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-3/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-3/output.js
@@ -1,6 +1,10 @@
-var _ref2 = <div>child</div>;
+var _ref2 =
+/*#__PURE__*/
+<div>child</div>;
 
-var _ref3 = <p>Parent</p>;
+var _ref3 =
+/*#__PURE__*/
+<p>Parent</p>;
 
 (function () {
   class App extends React.Component {
@@ -13,7 +17,9 @@ var _ref3 = <p>Parent</p>;
   const AppItem = () => {
     return _ref2;
   },
-        _ref = <div>
+        _ref =
+  /*#__PURE__*/
+  <div>
           {_ref3}
           <AppItem />
         </div>;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-4/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-4/output.js
index 7088d18dca32f..21fa63efbd88f 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-4/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope-4/output.js
@@ -1,13 +1,19 @@
-var _ref = <div>child</div>;
+var _ref =
+/*#__PURE__*/
+<div>child</div>;
 
-var _ref3 = <p>Parent</p>;
+var _ref3 =
+/*#__PURE__*/
+<p>Parent</p>;
 
 (function () {
   const AppItem = () => {
     return _ref;
   };
 
-  var _ref2 = <div>
+  var _ref2 =
+  /*#__PURE__*/
+  <div>
           {_ref3}
           <AppItem />
         </div>;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope/input.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope/input.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope/input.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope/output.mjs
similarity index 71%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope/output.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope/output.mjs
index e7f8ea322a448..730a99a08cd84 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/append-to-end-when-declared-in-scope/output.mjs
@@ -5,12 +5,16 @@ export default class App extends React.Component {
 
 }
 
-var _ref2 = <div>child</div>;
+var _ref2 =
+/*#__PURE__*/
+<div>child</div>;
 
 const AppItem = () => {
   return _ref2;
 },
-      _ref = <div>
+      _ref =
+/*#__PURE__*/
+<div>
         <p>Parent</p>
         <AppItem />
       </div>;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/async-function/input.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/async-function/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/async-function/input.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/async-function/input.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/async-function/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/async-function/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/async-function/output.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/async-function/output.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/children/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/children/output.js
index 9f725b28e8081..b341d7309f569 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/children/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/children/output.js
@@ -1,4 +1,6 @@
-var _ref = <span />;
+var _ref =
+/*#__PURE__*/
+<span />;
 
 var Foo = React.createClass({
   render: function () {
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/input.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/input.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/input.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/output.mjs
similarity index 93%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/output.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/output.mjs
index 9eaf6f3992d3d..12cdcd2c31128 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/class-assign-unreferenced-param-deopt/output.mjs
@@ -1,6 +1,8 @@
 import React from 'react'; // Regression test for https://github.com/babel/babel/issues/5552
 
-var _ref = <div />;
+var _ref =
+/*#__PURE__*/
+<div />;
 
 class BugReport extends React.Component {
   constructor(...args) {
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/compound-assignment/input.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/compound-assignment/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/compound-assignment/input.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/compound-assignment/input.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/compound-assignment/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/compound-assignment/output.mjs
similarity index 52%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/compound-assignment/output.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/compound-assignment/output.mjs
index ed30e48545642..3f305943f7bbb 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/compound-assignment/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/compound-assignment/output.mjs
@@ -1,9 +1,13 @@
 import React from 'react';
 import Loader from 'loader';
 
-var _ref = <Loader className="full-height" />;
+var _ref =
+/*#__PURE__*/
+<Loader className="full-height" />;
 
-var _ref2 = <Loader className="p-y-5" />;
+var _ref2 =
+/*#__PURE__*/
+<Loader className="p-y-5" />;
 
 const errorComesHere = () => _ref,
       thisWorksFine = () => _ref2;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/constructor/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/constructor/output.js
index e3e86ae68d6ee..ff7176d24ff8c 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/constructor/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/constructor/output.js
@@ -1,6 +1,8 @@
 var Foo = require("Foo");
 
-var _ref = <Foo />;
+var _ref =
+/*#__PURE__*/
+<Foo />;
 
 function render() {
   return _ref;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/deep-constant-violation/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/deep-constant-violation/output.js
index 325f0daf7c808..482d9ccbc4dcb 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/deep-constant-violation/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/deep-constant-violation/output.js
@@ -1,6 +1,10 @@
-var _ref = <b></b>;
+var _ref =
+/*#__PURE__*/
+<b></b>;
 
-var _ref2 = <span></span>;
+var _ref2 =
+/*#__PURE__*/
+<span></span>;
 
 function render() {
   var children = _ref;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-class/input.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-class/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-class/input.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-class/input.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-class/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-class/output.mjs
similarity index 61%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-class/output.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-class/output.mjs
index 060811816d12a..3cab082e24b8b 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-class/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-class/output.mjs
@@ -4,11 +4,15 @@ const Parent = ({}) => _ref;
 
 export default Parent;
 
-var _ref2 = <div className="child">
+var _ref2 =
+/*#__PURE__*/
+<div className="child">
     ChildTextContent
   </div>;
 
 let Child = () => _ref2,
-    _ref = <div className="parent">
+    _ref =
+/*#__PURE__*/
+<div className="parent">
     <Child />
   </div>;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-declaration/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-declaration/output.js
index 878e19404bce1..a8a3c7e285998 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-declaration/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-declaration/output.js
@@ -1,6 +1,8 @@
 function render() {
   const bar = "bar",
-        _ref = <foo bar={bar} />,
+        _ref =
+  /*#__PURE__*/
+  <foo bar={bar} />,
         renderFoo = () => _ref;
 
   return renderFoo();
@@ -10,7 +12,9 @@ function render() {
   const bar = "bar",
         renderFoo = () => _ref2,
         baz = "baz",
-        _ref2 = <foo bar={bar} baz={baz} />;
+        _ref2 =
+  /*#__PURE__*/
+  <foo bar={bar} baz={baz} />;
 
   return renderFoo();
 }
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params-2/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params-2/output.js
index 86a47eb10a312..fccc84ff7b1de 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params-2/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params-2/output.js
@@ -1,7 +1,9 @@
 function render() {
   var title = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';
 
-  var _ref = <Component title={title} />;
+  var _ref =
+  /*#__PURE__*/
+  <Component title={title} />;
 
   return () => _ref;
 }
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params/output.js
index 6780bc3d89305..93a36e512ca6a 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-default-params/output.js
@@ -1,6 +1,8 @@
 function render(Component) {
   var text = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '',
-      _ref = <Component text={text} />;
+      _ref =
+  /*#__PURE__*/
+  <Component text={text} />;
 
   return function () {
     return _ref;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-hoc/input.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-hoc/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-hoc/input.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-hoc/input.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-hoc/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-hoc/output.mjs
similarity index 68%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-hoc/output.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-hoc/output.mjs
index d1521a3baf4b0..105e9ef2a5804 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-hoc/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/dont-hoist-before-hoc/output.mjs
@@ -6,7 +6,9 @@ const Parent = ({}) => _ref;
 
 export default Parent;
 
-var _ref2 = <div className="child">
+var _ref2 =
+/*#__PURE__*/
+<div className="child">
     ChildTextContent
   </div>;
 
@@ -14,6 +16,8 @@ let Child = () => _ref2;
 
 Child = HOC(Child);
 
-var _ref = <div className="parent">
+var _ref =
+/*#__PURE__*/
+<div className="parent">
     <Child />
   </div>;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/function-parameter/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/function-parameter/output.js
index 0e737624dad5c..9aa0a32a48486 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/function-parameter/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/function-parameter/output.js
@@ -1,5 +1,7 @@
 function render(text) {
-  var _ref = <foo>{text}</foo>;
+  var _ref =
+  /*#__PURE__*/
+  <foo>{text}</foo>;
 
   return function () {
     return _ref;
@@ -9,7 +11,9 @@ function render(text) {
 var Foo2 = require("Foo");
 
 function createComponent(text) {
-  var _ref2 = <Foo2>{text}</Foo2>;
+  var _ref2 =
+  /*#__PURE__*/
+  <Foo2>{text}</Foo2>;
 
   return function render() {
     return _ref2;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/global-reference/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/global-reference/output.js
index 2bfa9cf8e6766..0e89a63b8f0dc 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/global-reference/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/global-reference/output.js
@@ -1,4 +1,6 @@
-var _ref = <div foo={notDeclared}></div>;
+var _ref =
+/*#__PURE__*/
+<div foo={notDeclared}></div>;
 
 var Foo = React.createClass({
   render: function render() {
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/html-element/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/html-element/output.js
index 7ec3220a51ab7..68181887a4823 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/html-element/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/html-element/output.js
@@ -1,10 +1,14 @@
-var _ref = <foo />;
+var _ref =
+/*#__PURE__*/
+<foo />;
 
 function render() {
   return _ref;
 }
 
-var _ref2 = <div className="foo"><input type="checkbox" checked={true} /></div>;
+var _ref2 =
+/*#__PURE__*/
+<div className="foo"><input type="checkbox" checked={true} /></div>;
 
 function render() {
   return _ref2;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/inline-elements/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/inline-elements/output.js
index 7ad3af57ed69f..3ae20e546c196 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/inline-elements/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/inline-elements/output.js
@@ -2,7 +2,9 @@ var REACT_ELEMENT_TYPE;
 
 function _jsx(type, props, key, children) { if (!REACT_ELEMENT_TYPE) { REACT_ELEMENT_TYPE = typeof Symbol === "function" && Symbol.for && Symbol.for("react.element") || 0xeac7; } var defaultProps = type && type.defaultProps; var childrenLength = arguments.length - 3; if (!props && childrenLength !== 0) { props = { children: void 0 }; } if (props && defaultProps) { for (var propName in defaultProps) { if (props[propName] === void 0) { props[propName] = defaultProps[propName]; } } } else if (!props) { props = defaultProps || {}; } if (childrenLength === 1) { props.children = children; } else if (childrenLength > 1) { var childArray = new Array(childrenLength); for (var i = 0; i < childrenLength; i++) { childArray[i] = arguments[i + 3]; } props.children = childArray; } return { $$typeof: REACT_ELEMENT_TYPE, type: type, key: key === undefined ? null : '' + key, ref: null, props: props, _owner: null }; }
 
-var _ref = _jsx("foo", {});
+var _ref =
+/*#__PURE__*/
+_jsx("foo", {});
 
 function render() {
   return _ref;
@@ -11,7 +13,9 @@ function render() {
 function render() {
   var text = getText();
 
-  var _ref2 = _jsx("foo", {}, void 0, text);
+  var _ref2 =
+  /*#__PURE__*/
+  _jsx("foo", {}, void 0, text);
 
   return function () {
     return _ref2;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/inner-declaration/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/inner-declaration/output.js
index b0e2cde1adf93..0175f703f8a84 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/inner-declaration/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/inner-declaration/output.js
@@ -1,7 +1,9 @@
 function render() {
   var text = getText();
 
-  var _ref = <foo>{text}</foo>;
+  var _ref =
+  /*#__PURE__*/
+  <foo>{text}</foo>;
 
   return function () {
     return _ref;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression-constant/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression-constant/output.js
index aa7a9994baeb4..ff03fb77d1b2f 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression-constant/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression-constant/output.js
@@ -1,7 +1,9 @@
 function render() {
   this.component = "div";
 
-  var _ref = <this.component />;
+  var _ref =
+  /*#__PURE__*/
+  <this.component />;
 
   return () => _ref;
 }
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression-this/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression-this/output.js
index 9ce3a08e7437a..a22f490042c65 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression-this/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression-this/output.js
@@ -1,10 +1,14 @@
-var _ref = <span>Sub Component</span>;
+var _ref =
+/*#__PURE__*/
+<span>Sub Component</span>;
 
 class Component extends React.Component {
   constructor(...args) {
     var _temp;
 
-    var _ref2 = <this.subComponent />;
+    var _ref2 =
+    /*#__PURE__*/
+    <this.subComponent />;
 
     return _temp = super(...args), this.subComponent = () => _ref, this.render = () => _ref2, _temp;
   }
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression/output.js
index fe12eb988d5d4..1abfd5c341d19 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/member-expression/output.js
@@ -1,10 +1,14 @@
-var _ref = <span>Sub Component</span>;
+var _ref =
+/*#__PURE__*/
+<span>Sub Component</span>;
 
 const els = {
   subComponent: () => _ref
 };
 
-var _ref2 = <els.subComponent />;
+var _ref2 =
+/*#__PURE__*/
+<els.subComponent />;
 
 class Component extends React.Component {
   constructor(...args) {
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/param-and-var/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/param-and-var/output.js
index 599a2b9297686..0060b31496722 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/param-and-var/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/param-and-var/output.js
@@ -1,6 +1,8 @@
 function fn(Component, obj) {
   var data = obj.data,
-      _ref = <Component prop={data} />;
+      _ref =
+  /*#__PURE__*/
+  <Component prop={data} />;
 
   return () => _ref;
 }
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure-multi/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure-multi/output.js
index c039c14143f5d..8b89a78b032b6 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure-multi/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure-multi/output.js
@@ -3,7 +3,9 @@ function render(_ref) {
       className = _ref.className,
       id = _ref.id;
 
-  var _ref2 = <Component text={text} className={className} id={id} />;
+  var _ref2 =
+  /*#__PURE__*/
+  <Component text={text} className={className} id={id} />;
 
   return () => _ref2;
 }
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure-rest/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure-rest/output.js
index a00f73f6f44f0..c457d24158227 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure-rest/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure-rest/output.js
@@ -4,7 +4,9 @@ function render(_ref) {
       id = _ref.id,
       props = babelHelpers.objectWithoutProperties(_ref, ["text", "className", "id"]);
 
-  var _ref2 = <Component text={text} className={className} id={id} />;
+  var _ref2 =
+  /*#__PURE__*/
+  <Component text={text} className={className} id={id} />;
 
   // intentionally ignoring props
   return () => _ref2;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure/output.js
index 272a607c98cc8..f890296a95d6c 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-destructure/output.js
@@ -1,7 +1,9 @@
 function render(_ref) {
   let text = _ref.text;
 
-  var _ref2 = <Component text={text} />;
+  var _ref2 =
+  /*#__PURE__*/
+  <Component text={text} />;
 
   return () => _ref2;
 }
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-reference/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-reference/output.js
index bec3e3499344c..00492afc72d99 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-reference/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/parameter-reference/output.js
@@ -1,5 +1,7 @@
 function render(text) {
-  var _ref = <div>{text}</div>;
+  var _ref =
+  /*#__PURE__*/
+  <div>{text}</div>;
 
   return function () {
     return _ref;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-2/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-2/output.js
index 71dfc286ceb05..0e6144849ed07 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-2/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-2/output.js
@@ -1,5 +1,7 @@
 function render(offset) {
-  var _ref = <div tabIndex={offset + 1} />;
+  var _ref =
+  /*#__PURE__*/
+  <div tabIndex={offset + 1} />;
 
   return function () {
     return _ref;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-3/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-3/output.js
index 79c8b1db99075..41fa9cc9d3893 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-3/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-3/output.js
@@ -1,6 +1,8 @@
 const OFFSET = 3;
 
-var _ref = <div tabIndex={OFFSET + 1} />;
+var _ref =
+/*#__PURE__*/
+<div tabIndex={OFFSET + 1} />;
 
 var Foo = React.createClass({
   render: function () {
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist-member/input.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist-member/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist-member/input.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist-member/input.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist-member/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist-member/output.js
deleted file mode 100644
index 1452baefa3a7f..0000000000000
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist-member/output.js
+++ /dev/null
@@ -1,11 +0,0 @@
-import Intl from 'react-intl';
-
-var _ref = <Intl.FormattedMessage id="someMessage.foo" defaultMessage={"Some text, " + "and some more too. {someValue}"} description="A test message for babel." values={{
-  someValue: "A value."
-}} />;
-
-var Foo = React.createClass({
-  render: function () {
-    return _ref;
-  }
-});
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist-member/output.mjs b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist-member/output.mjs
new file mode 100644
index 0000000000000..255829f6ab968
--- /dev/null
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist-member/output.mjs
@@ -0,0 +1,13 @@
+import Intl from 'react-intl';
+
+var _ref =
+/*#__PURE__*/
+<Intl.FormattedMessage id="someMessage.foo" defaultMessage={"Some text, " + "and some more too. {someValue}"} description="A test message for babel." values={{
+  someValue: "A value."
+}} />;
+
+var Foo = React.createClass({
+  render: function () {
+    return _ref;
+  }
+});
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist/output.js
index 9df27d0157b42..49e73a5663622 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression-whitelist/output.js
@@ -1,4 +1,6 @@
-var _ref = <FormattedMessage id="someMessage.foo" defaultMessage={"Some text, " + "and some more too. {someValue}"} description="A test message for babel." values={{
+var _ref =
+/*#__PURE__*/
+<FormattedMessage id="someMessage.foo" defaultMessage={"Some text, " + "and some more too. {someValue}"} description="A test message for babel." values={{
   someValue: "A value."
 }} />;
 
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression/output.js
index 957dc4a8a21b1..81c65bf5eddf2 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/pure-expression/output.js
@@ -1,4 +1,6 @@
-var _ref = <div data-text={"Some text, " + "and some more too."} />;
+var _ref =
+/*#__PURE__*/
+<div data-text={"Some text, " + "and some more too."} />;
 
 var Foo = React.createClass({
   render: function () {
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/reassignment/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/reassignment/output.js
index 9eb9d792f1430..48b45690df719 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/reassignment/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/reassignment/output.js
@@ -1,7 +1,9 @@
 function render(text) {
   text += "yes";
 
-  var _ref = <div>{text}</div>;
+  var _ref =
+  /*#__PURE__*/
+  <div>{text}</div>;
 
   return function () {
     return _ref;
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export-default/input.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export-default/input.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export-default/input.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export-default/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export-default/output.mjs
similarity index 57%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export-default/output.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export-default/output.mjs
index 0424a4d937b8d..285010c075513 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export-default/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export-default/output.mjs
@@ -7,4 +7,6 @@ class A {
 
 export default class B {}
 
-var _ref = React.createElement(B, null);
+var _ref =
+/*#__PURE__*/
+React.createElement(B, null);
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export/input.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export/input.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export/input.mjs
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export/output.mjs
similarity index 54%
rename from packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export/output.js
rename to packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export/output.mjs
index b42d9d936602a..1192322d7be88 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/regression-node-type-export/output.mjs
@@ -7,4 +7,6 @@ class A {
 
 export class B {}
 
-var _ref = React.createElement(B, null);
+var _ref =
+/*#__PURE__*/
+React.createElement(B, null);
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/text-children/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/text-children/output.js
index 43898f741313e..dc358b421fe22 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/text-children/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/text-children/output.js
@@ -1,4 +1,6 @@
-var _ref = <div className="class-name">
+var _ref =
+/*#__PURE__*/
+<div className="class-name">
       Text
     </div>;
 
diff --git a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/var/output.js b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/var/output.js
index a0bf6d783bed0..0c7bcb7eb2aa2 100644
--- a/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/var/output.js
+++ b/packages/babel-plugin-transform-react-constant-elements/test/fixtures/constant-elements/var/output.js
@@ -1,6 +1,8 @@
 function fn(Component) {
   var data = "prop",
-      _ref = <Component prop={data} />;
+      _ref =
+  /*#__PURE__*/
+  <Component prop={data} />;
 
   return () => _ref;
 }
diff --git a/packages/babel-plugin-transform-react-display-name/package.json b/packages/babel-plugin-transform-react-display-name/package.json
index f75996ba7225d..ed05d9fa17b2b 100644
--- a/packages/babel-plugin-transform-react-display-name/package.json
+++ b/packages/babel-plugin-transform-react-display-name/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-react-display-name",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Add displayName to React.createClass calls",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-react-display-name",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-react-display-name/src/index.js b/packages/babel-plugin-transform-react-display-name/src/index.js
index 85819e5d77ce8..e0d88d85699fa 100644
--- a/packages/babel-plugin-transform-react-display-name/src/index.js
+++ b/packages/babel-plugin-transform-react-display-name/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import path from "path";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   function addDisplayName(id, call) {
     const props = call.arguments[0].properties;
     let safe = true;
@@ -104,4 +107,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-react-inline-elements/package.json b/packages/babel-plugin-transform-react-inline-elements/package.json
index 389655d4bd7b2..2b636285b00f8 100644
--- a/packages/babel-plugin-transform-react-inline-elements/package.json
+++ b/packages/babel-plugin-transform-react-inline-elements/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-react-inline-elements",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Turn JSX elements into exploded React objects",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-react-inline-elements",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-builder-react-jsx": "7.0.0-beta.39"
+    "@babel/helper-builder-react-jsx": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-react-inline-elements/src/index.js b/packages/babel-plugin-transform-react-inline-elements/src/index.js
index a2288ee9be901..a5c2ef3ff85fb 100644
--- a/packages/babel-plugin-transform-react-inline-elements/src/index.js
+++ b/packages/babel-plugin-transform-react-inline-elements/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import helper from "@babel/helper-builder-react-jsx";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   function hasRefOrSpread(attrs) {
     for (let i = 0; i < attrs.length; i++) {
       const attr = attrs[i];
@@ -62,4 +65,4 @@ export default function() {
     },
   });
   return { visitor };
-}
+});
diff --git a/packages/babel-plugin-transform-react-inline-elements/test/fixtures/inline-elements/lowercase-member-expression/input.js b/packages/babel-plugin-transform-react-inline-elements/test/fixtures/inline-elements/lowercase-member-expression/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-inline-elements/test/fixtures/inline-elements/lowercase-member-expression/input.js
rename to packages/babel-plugin-transform-react-inline-elements/test/fixtures/inline-elements/lowercase-member-expression/input.mjs
diff --git a/packages/babel-plugin-transform-react-inline-elements/test/fixtures/inline-elements/member-expression/input.js b/packages/babel-plugin-transform-react-inline-elements/test/fixtures/inline-elements/member-expression/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-inline-elements/test/fixtures/inline-elements/member-expression/input.js
rename to packages/babel-plugin-transform-react-inline-elements/test/fixtures/inline-elements/member-expression/input.mjs
diff --git a/packages/babel-plugin-transform-react-jsx-compat/package.json b/packages/babel-plugin-transform-react-jsx-compat/package.json
index 07fdce24e5f78..14f8f87e938ad 100644
--- a/packages/babel-plugin-transform-react-jsx-compat/package.json
+++ b/packages/babel-plugin-transform-react-jsx-compat/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-react-jsx-compat",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Turn JSX into React Pre-0.12 function calls",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-react-jsx-compat",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-builder-react-jsx": "7.0.0-beta.39"
+    "@babel/helper-builder-react-jsx": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-react-jsx-compat/src/index.js b/packages/babel-plugin-transform-react-jsx-compat/src/index.js
index 85b93492082f6..844b255d4c7a9 100644
--- a/packages/babel-plugin-transform-react-jsx-compat/src/index.js
+++ b/packages/babel-plugin-transform-react-jsx-compat/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import helper from "@babel/helper-builder-react-jsx";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     manipulateOptions(opts, parserOpts) {
       parserOpts.plugins.push("jsx");
@@ -27,4 +30,4 @@ export default function() {
       compat: true,
     }),
   };
-}
+});
diff --git a/packages/babel-plugin-transform-react-jsx-self/package.json b/packages/babel-plugin-transform-react-jsx-self/package.json
index 496340ea99b35..cc452efdc3dd2 100644
--- a/packages/babel-plugin-transform-react-jsx-self/package.json
+++ b/packages/babel-plugin-transform-react-jsx-self/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-react-jsx-self",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Add a __self prop to all JSX Elements",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-react-jsx-self",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-jsx": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-jsx": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-react-jsx-self/src/index.js b/packages/babel-plugin-transform-react-jsx-self/src/index.js
index 409c0049991f4..375f22325620d 100644
--- a/packages/babel-plugin-transform-react-jsx-self/src/index.js
+++ b/packages/babel-plugin-transform-react-jsx-self/src/index.js
@@ -11,11 +11,14 @@
  *
  * <sometag __self={this} />
  */
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
 const TRACE_ID = "__self";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   const visitor = {
     JSXOpeningElement({ node }) {
       const id = t.jsxIdentifier(TRACE_ID);
@@ -28,4 +31,4 @@ export default function() {
   return {
     visitor,
   };
-}
+});
diff --git a/packages/babel-plugin-transform-react-jsx-source/package.json b/packages/babel-plugin-transform-react-jsx-source/package.json
index 5023f404ff748..2352ca9d058d6 100644
--- a/packages/babel-plugin-transform-react-jsx-source/package.json
+++ b/packages/babel-plugin-transform-react-jsx-source/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-react-jsx-source",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Add a __source prop to all JSX Elements",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-react-jsx-source",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-jsx": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-jsx": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-react-jsx-source/src/index.js b/packages/babel-plugin-transform-react-jsx-source/src/index.js
index 16e7b0bd39d55..71add8d1b52c1 100644
--- a/packages/babel-plugin-transform-react-jsx-source/src/index.js
+++ b/packages/babel-plugin-transform-react-jsx-source/src/index.js
@@ -12,12 +12,15 @@
  * var __jsxFileName = 'this/file.js';
  * <sometag __source={{fileName: __jsxFileName, lineNumber: 10}}/>
  */
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
 const TRACE_ID = "__source";
 const FILE_NAME_VAR = "_jsxFileName";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   function makeTrace(fileNameIdentifier, lineNumber) {
     const fileLineLiteral =
       lineNumber != null ? t.numericLiteral(lineNumber) : t.nullLiteral();
@@ -71,4 +74,4 @@ export default function() {
   return {
     visitor,
   };
-}
+});
diff --git a/packages/babel-plugin-transform-react-jsx/package.json b/packages/babel-plugin-transform-react-jsx/package.json
index ed3490af708b4..deecebf86da71 100644
--- a/packages/babel-plugin-transform-react-jsx/package.json
+++ b/packages/babel-plugin-transform-react-jsx/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-react-jsx",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Turn JSX into React function calls",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-react-jsx",
   "license": "MIT",
@@ -9,14 +9,15 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-builder-react-jsx": "7.0.0-beta.39",
-    "@babel/plugin-syntax-jsx": "7.0.0-beta.39"
+    "@babel/helper-builder-react-jsx": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-jsx": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-react-jsx/src/index.js b/packages/babel-plugin-transform-react-jsx/src/index.js
index d517a7a90b342..5ae4f11e71169 100644
--- a/packages/babel-plugin-transform-react-jsx/src/index.js
+++ b/packages/babel-plugin-transform-react-jsx/src/index.js
@@ -1,8 +1,11 @@
+import { declare } from "@babel/helper-plugin-utils";
 import jsx from "@babel/plugin-syntax-jsx";
 import helper from "@babel/helper-builder-react-jsx";
 import { types as t } from "@babel/core";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const THROW_IF_NAMESPACE =
     options.throwIfNamespace === undefined ? true : !!options.throwIfNamespace;
 
@@ -91,4 +94,4 @@ export default function(api, options) {
     inherits: jsx,
     visitor,
   };
-}
+});
diff --git a/packages/babel-plugin-transform-react-jsx/test/fixtures/react/display-name-export-default/input.js b/packages/babel-plugin-transform-react-jsx/test/fixtures/react/display-name-export-default/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-jsx/test/fixtures/react/display-name-export-default/input.js
rename to packages/babel-plugin-transform-react-jsx/test/fixtures/react/display-name-export-default/input.mjs
diff --git a/packages/babel-plugin-transform-react-jsx/test/fixtures/react/display-name-export-default/output.js b/packages/babel-plugin-transform-react-jsx/test/fixtures/react/display-name-export-default/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-react-jsx/test/fixtures/react/display-name-export-default/output.js
rename to packages/babel-plugin-transform-react-jsx/test/fixtures/react/display-name-export-default/output.mjs
diff --git a/packages/babel-plugin-transform-react-jsx/test/fixtures/react/optimisation.react.constant-elements/output.js b/packages/babel-plugin-transform-react-jsx/test/fixtures/react/optimisation.react.constant-elements/output.js
index dc5c056f68273..55beb4d7e3a60 100644
--- a/packages/babel-plugin-transform-react-jsx/test/fixtures/react/optimisation.react.constant-elements/output.js
+++ b/packages/babel-plugin-transform-react-jsx/test/fixtures/react/optimisation.react.constant-elements/output.js
@@ -1,4 +1,6 @@
-var _ref = <div className="navbar-header">
+var _ref =
+/*#__PURE__*/
+<div className="navbar-header">
       <a className="navbar-brand" href="/">
         <img src="/img/logo/logo-96x36.png" />
       </a>
diff --git a/packages/babel-plugin-transform-regenerator/package.json b/packages/babel-plugin-transform-regenerator/package.json
index f11c7e02a9db6..084f181fea9f4 100644
--- a/packages/babel-plugin-transform-regenerator/package.json
+++ b/packages/babel-plugin-transform-regenerator/package.json
@@ -2,7 +2,7 @@
   "name": "@babel/plugin-transform-regenerator",
   "author": "Ben Newman <bn@cs.stanford.edu>",
   "description": "Explode async and generator functions into a state machine.",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "homepage": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-regenerator",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-regenerator",
   "main": "lib/index.js",
@@ -11,10 +11,10 @@
   },
   "license": "MIT",
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-regenerator/test/fixtures/regression/6733/input.js b/packages/babel-plugin-transform-regenerator/test/fixtures/regression/6733/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-regenerator/test/fixtures/regression/6733/input.js
rename to packages/babel-plugin-transform-regenerator/test/fixtures/regression/6733/input.mjs
diff --git a/packages/babel-plugin-transform-reserved-words/package.json b/packages/babel-plugin-transform-reserved-words/package.json
index 824dcddcab678..5d0abe4193b41 100644
--- a/packages/babel-plugin-transform-reserved-words/package.json
+++ b/packages/babel-plugin-transform-reserved-words/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-reserved-words",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Ensure that no reserved words are used.",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-reserved-words",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-reserved-words/src/index.js b/packages/babel-plugin-transform-reserved-words/src/index.js
index b3d272e40d299..b691947ac6424 100644
--- a/packages/babel-plugin-transform-reserved-words/src/index.js
+++ b/packages/babel-plugin-transform-reserved-words/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       "BindingIdentifier|ReferencedIdentifier"(path) {
@@ -10,4 +13,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-runtime/package.json b/packages/babel-plugin-transform-runtime/package.json
index bcec27c63d2f7..09279958db09b 100644
--- a/packages/babel-plugin-transform-runtime/package.json
+++ b/packages/babel-plugin-transform-runtime/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-runtime",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Externalise references to helpers and builtins, automatically polyfilling your code without polluting globals",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-runtime",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-module-imports": "7.0.0-beta.39"
+    "@babel/helper-module-imports": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-runtime/src/index.js b/packages/babel-plugin-transform-runtime/src/index.js
index 8b1787c6d8202..dfb5d41306ccb 100644
--- a/packages/babel-plugin-transform-runtime/src/index.js
+++ b/packages/babel-plugin-transform-runtime/src/index.js
@@ -1,9 +1,12 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { addDefault, isModule } from "@babel/helper-module-imports";
 import { types as t } from "@babel/core";
 
 import definitions from "./definitions";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const {
     helpers,
     moduleName = "@babel/runtime",
@@ -212,6 +215,6 @@ export default function(api, options) {
       },
     },
   };
-}
+});
 
 export { definitions };
diff --git a/packages/babel-plugin-transform-runtime/test/fixtures/runtime/custom-runtime/input.js b/packages/babel-plugin-transform-runtime/test/fixtures/runtime/custom-runtime/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-runtime/test/fixtures/runtime/custom-runtime/input.js
rename to packages/babel-plugin-transform-runtime/test/fixtures/runtime/custom-runtime/input.mjs
diff --git a/packages/babel-plugin-transform-runtime/test/fixtures/runtime/custom-runtime/output.js b/packages/babel-plugin-transform-runtime/test/fixtures/runtime/custom-runtime/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-runtime/test/fixtures/runtime/custom-runtime/output.js
rename to packages/babel-plugin-transform-runtime/test/fixtures/runtime/custom-runtime/output.mjs
diff --git a/packages/babel-plugin-transform-runtime/test/fixtures/runtime/full/input.js b/packages/babel-plugin-transform-runtime/test/fixtures/runtime/full/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-runtime/test/fixtures/runtime/full/input.js
rename to packages/babel-plugin-transform-runtime/test/fixtures/runtime/full/input.mjs
diff --git a/packages/babel-plugin-transform-runtime/test/fixtures/runtime/full/output.js b/packages/babel-plugin-transform-runtime/test/fixtures/runtime/full/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-runtime/test/fixtures/runtime/full/output.js
rename to packages/babel-plugin-transform-runtime/test/fixtures/runtime/full/output.mjs
diff --git a/packages/babel-plugin-transform-runtime/test/fixtures/runtime/modules/input.js b/packages/babel-plugin-transform-runtime/test/fixtures/runtime/modules/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-runtime/test/fixtures/runtime/modules/input.js
rename to packages/babel-plugin-transform-runtime/test/fixtures/runtime/modules/input.mjs
diff --git a/packages/babel-plugin-transform-shorthand-properties/package.json b/packages/babel-plugin-transform-shorthand-properties/package.json
index a0ebe31b84672..ef5bfe9bd91f3 100644
--- a/packages/babel-plugin-transform-shorthand-properties/package.json
+++ b/packages/babel-plugin-transform-shorthand-properties/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-shorthand-properties",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 shorthand properties to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-shorthand-properties",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-shorthand-properties/src/index.js b/packages/babel-plugin-transform-shorthand-properties/src/index.js
index 09b138009c206..482607c370190 100644
--- a/packages/babel-plugin-transform-shorthand-properties/src/index.js
+++ b/packages/babel-plugin-transform-shorthand-properties/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       ObjectMethod(path) {
@@ -26,4 +29,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-spread/package.json b/packages/babel-plugin-transform-spread/package.json
index f418c2bf8c368..9690a3515defc 100644
--- a/packages/babel-plugin-transform-spread/package.json
+++ b/packages/babel-plugin-transform-spread/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-spread",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 spread to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-spread",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-spread/src/index.js b/packages/babel-plugin-transform-spread/src/index.js
index d9827ca8bd939..18f274474a789 100644
--- a/packages/babel-plugin-transform-spread/src/index.js
+++ b/packages/babel-plugin-transform-spread/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
+
   const { loose } = options;
 
   function getSpreadLiteral(spread, scope) {
@@ -156,4 +159,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-spread/test/fixtures/regression/6647/input.js b/packages/babel-plugin-transform-spread/test/fixtures/regression/6647/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-spread/test/fixtures/regression/6647/input.js
rename to packages/babel-plugin-transform-spread/test/fixtures/regression/6647/input.mjs
diff --git a/packages/babel-plugin-transform-sticky-regex/package.json b/packages/babel-plugin-transform-sticky-regex/package.json
index d29e8bfd0dfa2..2ede48ba7c757 100644
--- a/packages/babel-plugin-transform-sticky-regex/package.json
+++ b/packages/babel-plugin-transform-sticky-regex/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-sticky-regex",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 sticky regex to an ES5 RegExp constructor",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-sticky-regex",
   "license": "MIT",
@@ -9,13 +9,14 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-regex": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/helper-regex": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-sticky-regex/src/index.js b/packages/babel-plugin-transform-sticky-regex/src/index.js
index a6e7f0a48fa07..ee7a0aa5db5f1 100644
--- a/packages/babel-plugin-transform-sticky-regex/src/index.js
+++ b/packages/babel-plugin-transform-sticky-regex/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import * as regex from "@babel/helper-regex";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       RegExpLiteral(path) {
@@ -17,4 +20,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-strict-mode/package.json b/packages/babel-plugin-transform-strict-mode/package.json
index d30781a798822..56f699fe7c4ac 100644
--- a/packages/babel-plugin-transform-strict-mode/package.json
+++ b/packages/babel-plugin-transform-strict-mode/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-strict-mode",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "This plugin places a 'use strict'; directive at the top of all files to enable strict mode",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-strict-mode",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-strict-mode/src/index.js b/packages/babel-plugin-transform-strict-mode/src/index.js
index 05c775af967da..4dd2823b12d12 100644
--- a/packages/babel-plugin-transform-strict-mode/src/index.js
+++ b/packages/babel-plugin-transform-strict-mode/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       Program(path) {
@@ -17,4 +20,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-template-literals/package.json b/packages/babel-plugin-transform-template-literals/package.json
index 73f696c53558a..4a6eb8f2449f3 100644
--- a/packages/babel-plugin-transform-template-literals/package.json
+++ b/packages/babel-plugin-transform-template-literals/package.json
@@ -1,21 +1,22 @@
 {
   "name": "@babel/plugin-transform-template-literals",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 template literals to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-template-literals",
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/helper-annotate-as-pure": "7.0.0-beta.39"
+    "@babel/helper-annotate-as-pure": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
   },
   "keywords": [
     "babel-plugin"
   ],
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-template-literals/src/index.js b/packages/babel-plugin-transform-template-literals/src/index.js
index 6acc478537084..1ac0b165f9568 100644
--- a/packages/babel-plugin-transform-template-literals/src/index.js
+++ b/packages/babel-plugin-transform-template-literals/src/index.js
@@ -1,7 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import annotateAsPure from "@babel/helper-annotate-as-pure";
 import { types as t } from "@babel/core";
 
-export default function(api, options) {
+export default declare((api, options) => {
+  api.assertVersion(7);
   const { loose } = options;
 
   let helperName = "taggedTemplateLiteral";
@@ -54,6 +56,9 @@ export default function(api, options) {
         const strings = [];
         const raws = [];
 
+        // Flag variable to check if contents of strings and raw are equal
+        let isStringsRawEqual = true;
+
         for (const elem of (quasi.quasis: Array)) {
           const { raw, cooked } = elem.value;
           const value =
@@ -63,6 +68,11 @@ export default function(api, options) {
 
           strings.push(value);
           raws.push(t.stringLiteral(raw));
+
+          if (raw !== cooked) {
+            // false even if one of raw and cooked are not equal
+            isStringsRawEqual = false;
+          }
         }
 
         // Generate a unique name based on the string literals so we dedupe
@@ -81,10 +91,15 @@ export default function(api, options) {
           this.templates.set(name, templateObject);
 
           const helperId = this.addHelper(helperName);
-          const init = t.callExpression(helperId, [
-            t.arrayExpression(strings),
-            t.arrayExpression(raws),
-          ]);
+          const callExpressionInput = [];
+          callExpressionInput.push(t.arrayExpression(strings));
+
+          if (!isStringsRawEqual) {
+            callExpressionInput.push(t.arrayExpression(raws));
+          }
+
+          // only add raw arrayExpression if there is any difference between raws and strings
+          const init = t.callExpression(helperId, callExpressionInput);
           annotateAsPure(init);
           init._compact = true;
           programPath.scope.push({
@@ -142,4 +157,4 @@ export default function(api, options) {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-template-literals/test/fixtures/default/simple-tag/input.js b/packages/babel-plugin-transform-template-literals/test/fixtures/default/simple-tag/input.js
new file mode 100644
index 0000000000000..5b13aa793aa6f
--- /dev/null
+++ b/packages/babel-plugin-transform-template-literals/test/fixtures/default/simple-tag/input.js
@@ -0,0 +1,2 @@
+var foo = tag`wow`;
+var bar = tag`first${1}second`;
diff --git a/packages/babel-plugin-transform-template-literals/test/fixtures/default/simple-tag/output.js b/packages/babel-plugin-transform-template-literals/test/fixtures/default/simple-tag/output.js
new file mode 100644
index 0000000000000..7b916abd6b10a
--- /dev/null
+++ b/packages/babel-plugin-transform-template-literals/test/fixtures/default/simple-tag/output.js
@@ -0,0 +1,7 @@
+var _templateObject = /*#__PURE__*/ _taggedTemplateLiteral(["wow"]),
+    _templateObject2 = /*#__PURE__*/ _taggedTemplateLiteral(["first", "second"]);
+
+function _taggedTemplateLiteral(strings, raw) { if (!raw) { raw = strings.slice(0); } return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); }
+
+var foo = tag(_templateObject);
+var bar = tag(_templateObject2, 1);
diff --git a/packages/babel-plugin-transform-template-literals/test/fixtures/default/tag/output.js b/packages/babel-plugin-transform-template-literals/test/fixtures/default/tag/output.js
index 6a3d89a3c478d..b47badfa7fabc 100644
--- a/packages/babel-plugin-transform-template-literals/test/fixtures/default/tag/output.js
+++ b/packages/babel-plugin-transform-template-literals/test/fixtures/default/tag/output.js
@@ -2,7 +2,7 @@ var _templateObject = /*#__PURE__*/ _taggedTemplateLiteral(["wow\na", "b ", ""],
     _templateObject2 = /*#__PURE__*/ _taggedTemplateLiteral(["wow\nab", " ", ""], ["wow\\nab", " ", ""]),
     _templateObject3 = /*#__PURE__*/ _taggedTemplateLiteral(["wow\naB", " ", ""], ["wow\\naB", " ", ""]);
 
-function _taggedTemplateLiteral(strings, raw) { return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); }
+function _taggedTemplateLiteral(strings, raw) { if (!raw) { raw = strings.slice(0); } return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); }
 
 var foo = bar(_templateObject, 42, _.foobar());
 var bar = bar(_templateObject2, 42, _.foobar());
diff --git a/packages/babel-plugin-transform-template-literals/test/fixtures/default/template-revision/output.js b/packages/babel-plugin-transform-template-literals/test/fixtures/default/template-revision/output.js
index c7f4371d6ed92..2f8b82de8f459 100644
--- a/packages/babel-plugin-transform-template-literals/test/fixtures/default/template-revision/output.js
+++ b/packages/babel-plugin-transform-template-literals/test/fixtures/default/template-revision/output.js
@@ -6,7 +6,7 @@ var _templateObject = /*#__PURE__*/ _taggedTemplateLiteral([void 0], ["\\unicode
     _templateObject6 = /*#__PURE__*/ _taggedTemplateLiteral(["left", void 0, "right"], ["left", "\\u000g", "right"]),
     _templateObject7 = /*#__PURE__*/ _taggedTemplateLiteral(["left", void 0, "right"], ["left", "\\u{-0}", "right"]);
 
-function _taggedTemplateLiteral(strings, raw) { return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); }
+function _taggedTemplateLiteral(strings, raw) { if (!raw) { raw = strings.slice(0); } return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); }
 
 tag(_templateObject);
 tag(_templateObject2);
diff --git a/packages/babel-plugin-transform-template-literals/test/fixtures/loose/tag/output.js b/packages/babel-plugin-transform-template-literals/test/fixtures/loose/tag/output.js
index 09b108b3b191e..7e82908b36db8 100644
--- a/packages/babel-plugin-transform-template-literals/test/fixtures/loose/tag/output.js
+++ b/packages/babel-plugin-transform-template-literals/test/fixtures/loose/tag/output.js
@@ -2,7 +2,7 @@ var _templateObject = /*#__PURE__*/ _taggedTemplateLiteralLoose(["wow\na", "b ",
     _templateObject2 = /*#__PURE__*/ _taggedTemplateLiteralLoose(["wow\nab", " ", ""], ["wow\\nab", " ", ""]),
     _templateObject3 = /*#__PURE__*/ _taggedTemplateLiteralLoose(["wow\naB", " ", ""], ["wow\\naB", " ", ""]);
 
-function _taggedTemplateLiteralLoose(strings, raw) { strings.raw = raw; return strings; }
+function _taggedTemplateLiteralLoose(strings, raw) { if (!raw) { raw = strings.slice(0); } strings.raw = raw; return strings; }
 
 var foo = bar(_templateObject, 42, _.foobar());
 var bar = bar(_templateObject2, 42, _.foobar());
diff --git a/packages/babel-plugin-transform-template-literals/test/fixtures/loose/template-revision/output.js b/packages/babel-plugin-transform-template-literals/test/fixtures/loose/template-revision/output.js
index 3077a8c82f1cc..9eee99e3065d3 100644
--- a/packages/babel-plugin-transform-template-literals/test/fixtures/loose/template-revision/output.js
+++ b/packages/babel-plugin-transform-template-literals/test/fixtures/loose/template-revision/output.js
@@ -6,7 +6,7 @@ var _templateObject = /*#__PURE__*/ _taggedTemplateLiteralLoose([void 0], ["\\un
     _templateObject6 = /*#__PURE__*/ _taggedTemplateLiteralLoose(["left", void 0, "right"], ["left", "\\u000g", "right"]),
     _templateObject7 = /*#__PURE__*/ _taggedTemplateLiteralLoose(["left", void 0, "right"], ["left", "\\u{-0}", "right"]);
 
-function _taggedTemplateLiteralLoose(strings, raw) { strings.raw = raw; return strings; }
+function _taggedTemplateLiteralLoose(strings, raw) { if (!raw) { raw = strings.slice(0); } strings.raw = raw; return strings; }
 
 tag(_templateObject);
 tag(_templateObject2);
diff --git a/packages/babel-plugin-transform-typeof-symbol/package.json b/packages/babel-plugin-transform-typeof-symbol/package.json
index 15de7d878685a..1de4d6d700b0d 100644
--- a/packages/babel-plugin-transform-typeof-symbol/package.json
+++ b/packages/babel-plugin-transform-typeof-symbol/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-typeof-symbol",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "This transformer wraps all typeof expressions with a method that replicates native behaviour. (ie. returning “symbol” for symbols)",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-typeof-symbol",
   "license": "MIT",
@@ -8,11 +8,14 @@
   "keywords": [
     "babel-plugin"
   ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.42"
+  },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-typeof-symbol/src/index.js b/packages/babel-plugin-transform-typeof-symbol/src/index.js
index c32eba7c06bdb..70d1a65ca05d9 100644
--- a/packages/babel-plugin-transform-typeof-symbol/src/index.js
+++ b/packages/babel-plugin-transform-typeof-symbol/src/index.js
@@ -1,6 +1,9 @@
+import { declare } from "@babel/helper-plugin-utils";
 import { types as t } from "@babel/core";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       Scope({ scope }) {
@@ -47,7 +50,7 @@ export default function() {
 
         const call = t.callExpression(helper, [node.argument]);
         const arg = path.get("argument");
-        if (arg.isIdentifier() && !path.scope.hasBinding(arg.node.name)) {
+        if (arg.isIdentifier() && !path.scope.hasBinding(arg.node.name, true)) {
           const unary = t.unaryExpression("typeof", t.cloneNode(node.argument));
           path.replaceWith(
             t.conditionalExpression(
@@ -62,4 +65,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/builtin-global/input.mjs b/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/builtin-global/input.mjs
new file mode 100644
index 0000000000000..7cff6b432012e
--- /dev/null
+++ b/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/builtin-global/input.mjs
@@ -0,0 +1 @@
+typeof Reflect === "object";
\ No newline at end of file
diff --git a/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/builtin-global/options.json b/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/builtin-global/options.json
new file mode 100644
index 0000000000000..5730916af9503
--- /dev/null
+++ b/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/builtin-global/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["transform-typeof-symbol"]
+}
diff --git a/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/builtin-global/output.mjs b/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/builtin-global/output.mjs
new file mode 100644
index 0000000000000..8b1124c31ba12
--- /dev/null
+++ b/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/builtin-global/output.mjs
@@ -0,0 +1,3 @@
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function (obj) { return typeof obj; }; } else { _typeof = function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+(typeof Reflect === "undefined" ? "undefined" : _typeof(Reflect)) === "object";
diff --git a/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/default-export/input.js b/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/default-export/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/default-export/input.js
rename to packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/default-export/input.mjs
diff --git a/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/default-export/output.js b/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/default-export/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/default-export/output.js
rename to packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/default-export/output.mjs
diff --git a/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/non-typeof/input.js b/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/non-typeof/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/non-typeof/input.js
rename to packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/non-typeof/input.mjs
diff --git a/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/non-typeof/output.js b/packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/non-typeof/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/non-typeof/output.js
rename to packages/babel-plugin-transform-typeof-symbol/test/fixtures/symbols/non-typeof/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/README.md b/packages/babel-plugin-transform-typescript/README.md
index fdff26cdec3d4..9286ac31e8524 100644
--- a/packages/babel-plugin-transform-typescript/README.md
+++ b/packages/babel-plugin-transform-typescript/README.md
@@ -4,8 +4,12 @@
 
 Does not type-check its input. For that, you will need to install and set up TypeScript.
 
-Does not support `namespace`s or `const enum`s because those require type information to transpile.
-Also does not support `export =` and `import =`, because those cannot be transpiled to ES.next.
+## Caveats
+
+* Does not support [`namespace`][namespace]s. **Workaround**: Move to using [file exports][fm], or migrate to using the `module { }` syntax instead.
+* Does not support [`const enum`][const_enum]s because those require type information to compile.
+**Workaround**: Remove the `const`, which makes it available at runtime.
+* Does not support [`export =`][exin] and [`import =`][exin], because those cannot be compile to ES.next. **Workaround**: Convert to using `export default` and `export const`, and `import x, {y} from "z"`.
 
 ## Example
 
@@ -52,3 +56,8 @@ require("@babel/core").transform("code", {
   plugins: ["@babel/plugin-transform-typescript"]
 });
 ```
+
+[const_enum]: https://www.typescriptlang.org/docs/handbook/enums.html#const-enums
+[namespace]: https://www.typescriptlang.org/docs/handbook/namespaces.html
+[exin]: https://www.typescriptlang.org/docs/handbook/modules.html#export--and-import--require
+[fm]: https://github.com/Microsoft/dtslint/blob/master/docs/no-single-declare-module.md
diff --git a/packages/babel-plugin-transform-typescript/package.json b/packages/babel-plugin-transform-typescript/package.json
index 9005c9e64c492..588f1b7a20977 100644
--- a/packages/babel-plugin-transform-typescript/package.json
+++ b/packages/babel-plugin-transform-typescript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-typescript",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Transform TypeScript into ES.next",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-typescript",
   "license": "MIT",
@@ -10,13 +10,14 @@
     "typescript"
   ],
   "dependencies": {
-    "@babel/plugin-syntax-typescript": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-typescript": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-typescript/src/index.js b/packages/babel-plugin-transform-typescript/src/index.js
index efb7ae5e1370e..e93f7a5b0d374 100644
--- a/packages/babel-plugin-transform-typescript/src/index.js
+++ b/packages/babel-plugin-transform-typescript/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxTypeScript from "@babel/plugin-syntax-typescript";
 import { types as t } from "@babel/core";
 
@@ -19,7 +20,9 @@ interface State {
   programPath: any;
 }
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     inherits: syntaxTypeScript,
     visitor: {
@@ -79,6 +82,10 @@ export default function() {
         if (path.node.declare) path.remove();
       },
 
+      VariableDeclarator({ node }) {
+        if (node.definite) node.definite = null;
+      },
+
       ClassMethod(path) {
         const { node } = path;
 
@@ -154,7 +161,9 @@ export default function() {
 
         if (node.accessibility) node.accessibility = null;
         if (node.abstract) node.abstract = null;
+        if (node.readonly) node.readonly = null;
         if (node.optional) node.optional = null;
+        if (node.definite) node.definite = null;
         if (node.typeAnnotation) node.typeAnnotation = null;
       },
 
@@ -270,4 +279,4 @@ export default function() {
     });
     return !sourceFileHasJsx;
   }
-}
+});
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/class/export-default-abstract/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/class/export-default-abstract/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/class/export-default-abstract/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/class/export-default-abstract/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/class/export-default-abstract/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/class/export-default-abstract/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/class/export-default-abstract/output.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/class/export-default-abstract/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/class/properties/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/class/properties/input.js
index 36c4f340ca34e..ce12b25f6fd46 100644
--- a/packages/babel-plugin-transform-typescript/test/fixtures/class/properties/input.js
+++ b/packages/babel-plugin-transform-typescript/test/fixtures/class/properties/input.js
@@ -1,4 +1,5 @@
 class C {
     public a?: number;
     private b: number = 0;
+    readonly c!: number = 1;
 }
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/class/properties/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/class/properties/output.js
index 14de70ecc590b..77e91a62b0671 100644
--- a/packages/babel-plugin-transform-typescript/test/fixtures/class/properties/output.js
+++ b/packages/babel-plugin-transform-typescript/test/fixtures/class/properties/output.js
@@ -1,3 +1,4 @@
 class C {
   b = 0;
+  c = 1;
 }
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/declarations/erased/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/declarations/erased/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/declarations/erased/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/declarations/erased/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/declarations/erased/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/declarations/erased/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/declarations/erased/output.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/declarations/erased/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/enum/boolean-value/actual.js b/packages/babel-plugin-transform-typescript/test/fixtures/enum/boolean-value/input.js
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/enum/boolean-value/actual.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/enum/boolean-value/input.js
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/enum/boolean-value/expected.js b/packages/babel-plugin-transform-typescript/test/fixtures/enum/boolean-value/output.js
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/enum/boolean-value/expected.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/enum/boolean-value/output.js
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/enum/export/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/enum/export/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/enum/export/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/enum/export/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/enum/export/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/enum/export/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/enum/export/output.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/enum/export/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/enum/inner-references/actual.js b/packages/babel-plugin-transform-typescript/test/fixtures/enum/inner-references/input.js
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/enum/inner-references/actual.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/enum/inner-references/input.js
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/enum/inner-references/expected.js b/packages/babel-plugin-transform-typescript/test/fixtures/enum/inner-references/output.js
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/enum/inner-references/expected.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/enum/inner-references/output.js
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values-computed/actual.js b/packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values-computed/input.js
similarity index 100%
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rename to packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values-computed/input.js
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values-computed/expected.js b/packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values-computed/output.js
similarity index 100%
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rename to packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values-computed/output.js
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values/actual.js b/packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values/input.js
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values/actual.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values/input.js
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values/expected.js b/packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values/output.js
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values/expected.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/enum/string-values/output.js
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/exports/export=/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/exports/export=/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/exports/export=/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/exports/export=/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-no-import-specifiers/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-no-import-specifiers/input.mjs
similarity index 100%
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rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-no-import-specifiers/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-no-import-specifiers/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-no-import-specifiers/output.mjs
similarity index 100%
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rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-no-import-specifiers/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no-2/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no-2/input.mjs
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rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no-2/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no-2/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no-2/output.mjs
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rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no-2/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no/input.mjs
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rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no/output.mjs
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rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react-no/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react/output.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-react/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-typeof/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-typeof/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-typeof/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-typeof/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-typeof/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-typeof/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-typeof/output.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-typeof/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-locations/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-locations/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-locations/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-locations/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-locations/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-locations/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-locations/output.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-locations/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-qualifiedname/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-qualifiedname/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-qualifiedname/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-qualifiedname/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-qualifiedname/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-qualifiedname/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-qualifiedname/output.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-qualifiedname/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-rename/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-rename/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-rename/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-rename/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-rename/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-rename/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-rename/output.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elision-rename/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elision/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elision/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elision/output.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elision/output.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elision/output.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/import=/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/import=/input.mjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/import=/input.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/import=/input.mjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/variable-declaration/exclamation/input.js b/packages/babel-plugin-transform-typescript/test/fixtures/variable-declaration/exclamation/input.js
new file mode 100644
index 0000000000000..f27135a2b9f0d
--- /dev/null
+++ b/packages/babel-plugin-transform-typescript/test/fixtures/variable-declaration/exclamation/input.js
@@ -0,0 +1 @@
+let x!: number;
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/variable-declaration/exclamation/output.js b/packages/babel-plugin-transform-typescript/test/fixtures/variable-declaration/exclamation/output.js
new file mode 100644
index 0000000000000..2756c24c45775
--- /dev/null
+++ b/packages/babel-plugin-transform-typescript/test/fixtures/variable-declaration/exclamation/output.js
@@ -0,0 +1 @@
+let x;
diff --git a/packages/babel-plugin-transform-unicode-regex/package.json b/packages/babel-plugin-transform-unicode-regex/package.json
index 8da305da548ec..bcf4a778d3a8f 100644
--- a/packages/babel-plugin-transform-unicode-regex/package.json
+++ b/packages/babel-plugin-transform-unicode-regex/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/plugin-transform-unicode-regex",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Compile ES2015 Unicode regex to ES5",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-unicode-regex",
   "license": "MIT",
@@ -9,14 +9,15 @@
     "babel-plugin"
   ],
   "dependencies": {
-    "@babel/helper-regex": "7.0.0-beta.39",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/helper-regex": "7.0.0-beta.42",
     "regexpu-core": "^4.1.3"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-plugin-transform-unicode-regex/src/index.js b/packages/babel-plugin-transform-unicode-regex/src/index.js
index 22360409196a4..6b0e434ddad98 100644
--- a/packages/babel-plugin-transform-unicode-regex/src/index.js
+++ b/packages/babel-plugin-transform-unicode-regex/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import rewritePattern from "regexpu-core";
 import * as regex from "@babel/helper-regex";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     visitor: {
       RegExpLiteral({ node }) {
@@ -11,4 +14,4 @@ export default function() {
       },
     },
   };
-}
+});
diff --git a/packages/babel-polyfill/package.json b/packages/babel-polyfill/package.json
index 7f4bedf59aa0a..41cc1857b57f4 100644
--- a/packages/babel-polyfill/package.json
+++ b/packages/babel-polyfill/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/polyfill",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Provides polyfills necessary for a full ES2015+ environment",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
diff --git a/packages/babel-preset-env-standalone/package.json b/packages/babel-preset-env-standalone/package.json
index 2a7e403aace48..edab002d04091 100644
--- a/packages/babel-preset-env-standalone/package.json
+++ b/packages/babel-preset-env-standalone/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-env-standalone",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Standalone build of babel-prest-env for use in non-Node.js environments.",
   "main": "babel-preset-env.js",
   "files": [
@@ -9,10 +9,9 @@
     "src"
   ],
   "devDependencies": {
-    "@babel/plugin-transform-new-target": "7.0.0-beta.39",
-    "@babel/preset-env": "7.0.0-beta.39",
-    "@babel/standalone": "7.0.0-beta.39",
-    "mock-require": "^2.0.2"
+    "@babel/plugin-transform-new-target": "7.0.0-beta.42",
+    "@babel/preset-env": "7.0.0-beta.42",
+    "@babel/standalone": "7.0.0-beta.42"
   },
   "keywords": [
     "babel",
diff --git a/packages/babel-preset-env-standalone/test/babel-preset-env.js b/packages/babel-preset-env-standalone/test/babel-preset-env.js
index c61a67a93a515..0e7c3ca5aeef5 100644
--- a/packages/babel-preset-env-standalone/test/babel-preset-env.js
+++ b/packages/babel-preset-env-standalone/test/babel-preset-env.js
@@ -1,57 +1,66 @@
 const assert = require("assert");
-const mock = require("mock-require");
-const Babel = require("@babel/standalone/babel");
-mock("Babel", Babel);
-require("../babel-preset-env");
 
-describe("babel-preset-env-standalone", () => {
-  it("works w/o targets", () => {
-    const output = Babel.transform("const a = 1;", {
-      presets: ["env"],
-    }).code;
-    assert.equal(output, "var a = 1;");
-  });
+(process.env.TEST_TYPE === "cov" ? describe.skip : describe)(
+  "babel-preset-env-standalone",
+  () => {
+    const Babel = require("@babel/standalone/babel");
+    jest.mock("Babel", () => require("@babel/standalone/babel"), {
+      virtual: true,
+    });
+    require("../babel-preset-env");
 
-  it("doesn't transpile `const` with chrome 60", () => {
-    const output = Babel.transform("const a = 1;", {
-      presets: [
-        [
-          "env",
-          {
-            targets: {
-              chrome: 60,
+    it("works w/o targets", () => {
+      const output = Babel.transform("const a = 1;", {
+        sourceType: "script",
+        presets: ["env"],
+      }).code;
+      assert.equal(output, "var a = 1;");
+    });
+
+    it("doesn't transpile `const` with chrome 60", () => {
+      const output = Babel.transform("const a = 1;", {
+        sourceType: "script",
+        presets: [
+          [
+            "env",
+            {
+              targets: {
+                chrome: 60,
+              },
             },
-          },
+          ],
         ],
-      ],
-    }).code;
-    assert.equal(output, "const a = 1;");
-  });
+      }).code;
+      assert.equal(output, "const a = 1;");
+    });
 
-  it("transpiles `const` with chrome 60 and preset-es2015", () => {
-    const output = Babel.transform("const a = 1;", {
-      presets: [
-        [
-          "env",
-          {
-            targets: {
-              chrome: 60,
+    it("transpiles `const` with chrome 60 and preset-es2015", () => {
+      const output = Babel.transform("const a = 1;", {
+        sourceType: "script",
+        presets: [
+          [
+            "env",
+            {
+              targets: {
+                chrome: 60,
+              },
             },
-          },
+          ],
+          "es2015",
         ],
-        "es2015",
-      ],
-    }).code;
-    assert.equal(output, "var a = 1;");
-  });
+      }).code;
+      assert.equal(output, "var a = 1;");
+    });
 
-  it("uses transform-new-targets plugin", () => {
-    const output = Babel.transform("function Foo() {new.target}", {
-      presets: ["env"],
-    }).code;
-    assert.equal(
-      output,
-      "function Foo() {\n  this instanceof Foo ? this.constructor : void 0;\n}",
-    );
-  });
-});
+    it("uses transform-new-targets plugin", () => {
+      const output = Babel.transform("function Foo() {new.target}", {
+        sourceType: "script",
+        presets: ["env"],
+      }).code;
+      assert.equal(
+        output,
+        "function Foo() {\n  this instanceof Foo ? this.constructor : void 0;\n}",
+      );
+    });
+  },
+);
diff --git a/packages/babel-preset-env/README.md b/packages/babel-preset-env/README.md
index 1e968236c8959..3bb7ec1991352 100644
--- a/packages/babel-preset-env/README.md
+++ b/packages/babel-preset-env/README.md
@@ -405,13 +405,14 @@ Toggles whether or not [browserslist config sources](https://github.com/ai/brows
 
 `boolean`, defaults to `false`
 
-Toggles enabling support for builtin/feature proposals that have shipped in browsers. If your target environments have native support for a feature proposal, its matching parser syntax plugin is enabled instead of performing any transform. Note that this _does not_ enable the same transformations as [`@babel/preset-stage3`](https://babeljs.io/docs/plugins/preset-stage-3/), since proposals can continue to change before landing in browsers.
+Toggles enabling support for builtin/feature proposals that have shipped in browsers. If your target environments have native support for a feature proposal, its matching parser syntax plugin is enabled instead of performing any transform. Note that this _does not_ enable the same transformations as [`@babel/preset-stage-3`](https://babeljs.io/docs/plugins/preset-stage-3/), since proposals can continue to change before landing in browsers.
 
 The following are currently supported:
 
 **Builtins**
 
 - [Promise.prototype.finally](https://github.com/tc39/proposal-promise-finally)
+- [Symbol.asyncIterator](https://github.com/tc39/proposal-async-iteration)
 
 **Features**
 
diff --git a/packages/babel-preset-env/data/built-in-modules.json b/packages/babel-preset-env/data/built-in-modules.json
index 9cab30106fc57..c2d05dbd7135a 100644
--- a/packages/babel-preset-env/data/built-in-modules.json
+++ b/packages/babel-preset-env/data/built-in-modules.json
@@ -1,6 +1,7 @@
 {
   "es6.module": {
     "edge": "16",
+    "firefox": "60",
     "chrome": "61",
     "safari": "10.1",
     "ios_saf": "10.3"
diff --git a/packages/babel-preset-env/data/built-ins.json b/packages/babel-preset-env/data/built-ins.json
index 96b619f845ffd..2ba4db1f14269 100644
--- a/packages/babel-preset-env/data/built-ins.json
+++ b/packages/babel-preset-env/data/built-ins.json
@@ -1149,6 +1149,12 @@
   "es7.promise.finally": {
     "chrome": "63",
     "firefox": "58",
+    "safari": "11.1",
+    "opera": "50"
+  },
+  "es7.symbol.async-iterator": {
+    "chrome": "63",
+    "firefox": "57",
     "safari": "tp",
     "opera": "50"
   }
diff --git a/packages/babel-preset-env/data/plugins.json b/packages/babel-preset-env/data/plugins.json
index 99ed3351eeef2..fccca0e457e72 100644
--- a/packages/babel-preset-env/data/plugins.json
+++ b/packages/babel-preset-env/data/plugins.json
@@ -220,7 +220,7 @@
   },
   "transform-dotall-regex": {
     "chrome": "62",
-    "safari": "tp",
+    "safari": "11.1",
     "opera": "49"
   },
   "proposal-async-generator-functions": {
@@ -232,17 +232,20 @@
   "proposal-object-rest-spread": {
     "chrome": "60",
     "firefox": "55",
-    "safari": "tp",
+    "safari": "11.1",
     "node": "8.3",
-    "opera": "47"
+    "opera": "47",
+    "electron": "2"
   },
   "proposal-optional-catch-binding": {
+    "chrome": "66",
     "firefox": "58",
-    "safari": "tp"
+    "safari": "11.1",
+    "opera": "53"
   },
   "proposal-unicode-property-regex": {
     "chrome": "64",
-    "safari": "tp",
+    "safari": "11.1",
     "opera": "51"
   }
 }
diff --git a/packages/babel-preset-env/data/shipped-proposals.js b/packages/babel-preset-env/data/shipped-proposals.js
index 09f7e5071a927..d63e07f3cfc0a 100644
--- a/packages/babel-preset-env/data/shipped-proposals.js
+++ b/packages/babel-preset-env/data/shipped-proposals.js
@@ -2,7 +2,8 @@
 // shipped by browsers, and are enabled by the `shippedProposals` option.
 
 const builtIns = {
-  "es7.promise.finally": "Promise.prototype.finally"
+  "es7.promise.finally": "Promise.prototype.finally",
+  "es7.symbol.async-iterator": "Asynchronous Iterators",
 };
 
 const features = {
diff --git a/packages/babel-preset-env/package.json b/packages/babel-preset-env/package.json
index e9438cad0a7a7..3fbd92b801e6c 100644
--- a/packages/babel-preset-env/package.json
+++ b/packages/babel-preset-env/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-env",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "A Babel preset for each environment.",
   "author": "Henry Zhu <hi@henryzoo.com>",
   "homepage": "https://babeljs.io/",
@@ -11,53 +11,55 @@
     "build-data": "node ./scripts/build-data.js; node ./scripts/build-modules-support.js"
   },
   "dependencies": {
-    "@babel/plugin-proposal-async-generator-functions": "7.0.0-beta.39",
-    "@babel/plugin-proposal-object-rest-spread": "7.0.0-beta.39",
-    "@babel/plugin-proposal-optional-catch-binding": "7.0.0-beta.39",
-    "@babel/plugin-proposal-unicode-property-regex": "7.0.0-beta.39",
-    "@babel/plugin-syntax-async-generators": "7.0.0-beta.39",
-    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.39",
-    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.39",
-    "@babel/plugin-transform-arrow-functions": "7.0.0-beta.39",
-    "@babel/plugin-transform-async-to-generator": "7.0.0-beta.39",
-    "@babel/plugin-transform-block-scoped-functions": "7.0.0-beta.39",
-    "@babel/plugin-transform-block-scoping": "7.0.0-beta.39",
-    "@babel/plugin-transform-classes": "7.0.0-beta.39",
-    "@babel/plugin-transform-computed-properties": "7.0.0-beta.39",
-    "@babel/plugin-transform-destructuring": "7.0.0-beta.39",
-    "@babel/plugin-transform-dotall-regex": "7.0.0-beta.39",
-    "@babel/plugin-transform-duplicate-keys": "7.0.0-beta.39",
-    "@babel/plugin-transform-exponentiation-operator": "7.0.0-beta.39",
-    "@babel/plugin-transform-for-of": "7.0.0-beta.39",
-    "@babel/plugin-transform-function-name": "7.0.0-beta.39",
-    "@babel/plugin-transform-literals": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-amd": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-commonjs": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-systemjs": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-umd": "7.0.0-beta.39",
-    "@babel/plugin-transform-new-target": "7.0.0-beta.39",
-    "@babel/plugin-transform-object-super": "7.0.0-beta.39",
-    "@babel/plugin-transform-parameters": "7.0.0-beta.39",
-    "@babel/plugin-transform-regenerator": "7.0.0-beta.39",
-    "@babel/plugin-transform-shorthand-properties": "7.0.0-beta.39",
-    "@babel/plugin-transform-spread": "7.0.0-beta.39",
-    "@babel/plugin-transform-sticky-regex": "7.0.0-beta.39",
-    "@babel/plugin-transform-template-literals": "7.0.0-beta.39",
-    "@babel/plugin-transform-typeof-symbol": "7.0.0-beta.39",
-    "@babel/plugin-transform-unicode-regex": "7.0.0-beta.39",
-    "browserslist": "^2.4.0",
+    "@babel/helper-module-imports": "7.0.0-beta.42",
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-proposal-async-generator-functions": "7.0.0-beta.42",
+    "@babel/plugin-proposal-object-rest-spread": "7.0.0-beta.42",
+    "@babel/plugin-proposal-optional-catch-binding": "7.0.0-beta.42",
+    "@babel/plugin-proposal-unicode-property-regex": "7.0.0-beta.42",
+    "@babel/plugin-syntax-async-generators": "7.0.0-beta.42",
+    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.42",
+    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.42",
+    "@babel/plugin-transform-arrow-functions": "7.0.0-beta.42",
+    "@babel/plugin-transform-async-to-generator": "7.0.0-beta.42",
+    "@babel/plugin-transform-block-scoped-functions": "7.0.0-beta.42",
+    "@babel/plugin-transform-block-scoping": "7.0.0-beta.42",
+    "@babel/plugin-transform-classes": "7.0.0-beta.42",
+    "@babel/plugin-transform-computed-properties": "7.0.0-beta.42",
+    "@babel/plugin-transform-destructuring": "7.0.0-beta.42",
+    "@babel/plugin-transform-dotall-regex": "7.0.0-beta.42",
+    "@babel/plugin-transform-duplicate-keys": "7.0.0-beta.42",
+    "@babel/plugin-transform-exponentiation-operator": "7.0.0-beta.42",
+    "@babel/plugin-transform-for-of": "7.0.0-beta.42",
+    "@babel/plugin-transform-function-name": "7.0.0-beta.42",
+    "@babel/plugin-transform-literals": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-amd": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-commonjs": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-systemjs": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-umd": "7.0.0-beta.42",
+    "@babel/plugin-transform-new-target": "7.0.0-beta.42",
+    "@babel/plugin-transform-object-super": "7.0.0-beta.42",
+    "@babel/plugin-transform-parameters": "7.0.0-beta.42",
+    "@babel/plugin-transform-regenerator": "7.0.0-beta.42",
+    "@babel/plugin-transform-shorthand-properties": "7.0.0-beta.42",
+    "@babel/plugin-transform-spread": "7.0.0-beta.42",
+    "@babel/plugin-transform-sticky-regex": "7.0.0-beta.42",
+    "@babel/plugin-transform-template-literals": "7.0.0-beta.42",
+    "@babel/plugin-transform-typeof-symbol": "7.0.0-beta.42",
+    "@babel/plugin-transform-unicode-regex": "7.0.0-beta.42",
+    "browserslist": "^3.0.0",
     "invariant": "^2.2.2",
     "semver": "^5.3.0"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/cli": "7.0.0-beta.39",
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-fixtures": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39",
-    "compat-table": "kangax/compat-table#3e30cd67a5d3d853caf8424d00ca66d100674d4f",
+    "@babel/cli": "7.0.0-beta.42",
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-fixtures": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42",
+    "compat-table": "kangax/compat-table#7c202e2da648fbd9d223d48d1680ec8f15147044",
     "electron-to-chromium": "^1.3.27",
     "request": "^2.83.0"
   }
diff --git a/packages/babel-preset-env/scripts/build-modules-support.js b/packages/babel-preset-env/scripts/build-modules-support.js
index 55cf110165015..edbdd85b8b836 100644
--- a/packages/babel-preset-env/scripts/build-modules-support.js
+++ b/packages/babel-preset-env/scripts/build-modules-support.js
@@ -8,12 +8,16 @@ const request = require("request");
 // * https://html.spec.whatwg.org/multipage/scripting.html#attr-script-type
 const lastKnown = {
   chrome: 61,
-  firefox: 59,
   safari: 10.1,
   ios_saf: 10.3,
   edge: 16,
 };
 
+const acceptedWithCaveats = {
+  safari: true,
+  ios_saf: true,
+};
+
 function input() {
   return new Promise(function(resolve, reject) {
     request(
@@ -38,12 +42,15 @@ function input() {
               const browserVersions = stats[browser];
               const allowedVersions = Object.keys(browserVersions)
                 .filter(value => {
-                  return browserVersions[value] === "y";
+                  return acceptedWithCaveats[browser]
+                    ? browserVersions[value][0] === "a"
+                    : browserVersions[value] === "y";
                 })
                 .sort((a, b) => a - b);
 
               if (allowedVersions[0] !== undefined) {
-                allowedBrowsers[browser] = allowedVersions[0];
+                // Handle cases where caniuse specifies version as: "11.0-11.2"
+                allowedBrowsers[browser] = allowedVersions[0].split("-")[0];
               }
             }
           });
diff --git a/packages/babel-preset-env/src/built-in-definitions.js b/packages/babel-preset-env/src/built-in-definitions.js
index f4bf559ab3033..7153a5ccdc10f 100644
--- a/packages/babel-preset-env/src/built-in-definitions.js
+++ b/packages/babel-preset-env/src/built-in-definitions.js
@@ -15,8 +15,8 @@ export const definitions = {
     Set: "es6.set",
     WeakMap: "es6.weak-map",
     WeakSet: "es6.weak-set",
-    Promise: "es6.promise",
-    Symbol: "es6.symbol",
+    Promise: ["es6.object.to-string", "es6.promise"],
+    Symbol: ["es6.symbol", "es7.symbol.async-iterator"],
   },
 
   instanceMethods: {
@@ -109,11 +109,18 @@ export const definitions = {
       isInteger: "es6.number.is-integer",
       isSafeInteger: "es6.number.is-safe-integer",
       isNaN: "es6.number.is-nan",
+      parseFloat: "es6.number.parse-float",
+      parseInt: "es6.number.parse-int",
       EPSILON: "es6.number.epsilon",
       MIN_SAFE_INTEGER: "es6.number.min-safe-integer",
       MAX_SAFE_INTEGER: "es6.number.max-safe-integer",
     },
 
+    Promise: {
+      all: ["es6.string.iterator", "web.dom.iterable"],
+      race: ["es6.string.iterator", "web.dom.iterable"],
+    },
+
     Reflect: {
       apply: "es6.reflect.apply",
       construct: "es6.reflect.construct",
diff --git a/packages/babel-preset-env/src/index.js b/packages/babel-preset-env/src/index.js
index ae6c4825f1745..99464814af643 100644
--- a/packages/babel-preset-env/src/index.js
+++ b/packages/babel-preset-env/src/index.js
@@ -25,7 +25,8 @@ import {
   semverify,
   isUnreleasedVersion,
 } from "./utils";
-import type { Plugin, Targets } from "./types";
+import type { Targets } from "./types";
+import { declare } from "@babel/helper-plugin-utils";
 
 const getPlugin = (pluginName: string) => {
   const plugin = availablePlugins[pluginName];
@@ -152,10 +153,9 @@ const filterItems = (
   return result;
 };
 
-export default function buildPreset(
-  api: Object,
-  opts: Object = {},
-): { plugins: Array<Plugin> } {
+export default declare((api, opts) => {
+  api.assertVersion(7);
+
   const {
     configPath,
     debug,
@@ -288,4 +288,4 @@ Using polyfills with \`${useBuiltIns}\` option:`,
   return {
     plugins,
   };
-}
+});
diff --git a/packages/babel-preset-env/src/normalize-options.js b/packages/babel-preset-env/src/normalize-options.js
index 9c0b2ed139625..bbcdbd19f732d 100644
--- a/packages/babel-preset-env/src/normalize-options.js
+++ b/packages/babel-preset-env/src/normalize-options.js
@@ -169,7 +169,7 @@ export default function normalizeOptions(opts: Options) {
       false,
     ),
     spec: validateBoolOption("loose", opts.spec, false),
-    targets: opts.targets,
+    targets: Object.assign({}, opts.targets),
     useBuiltIns: validateUseBuiltInsOption(opts.useBuiltIns),
   };
 }
diff --git a/packages/babel-preset-env/src/use-built-ins-entry-plugin.js b/packages/babel-preset-env/src/use-built-ins-entry-plugin.js
index 0c6620fc053f6..bb2680969c71a 100644
--- a/packages/babel-preset-env/src/use-built-ins-entry-plugin.js
+++ b/packages/babel-preset-env/src/use-built-ins-entry-plugin.js
@@ -1,11 +1,6 @@
 // @flow
 import { logEntryPolyfills } from "./debug";
-import {
-  createImport,
-  isPolyfillSource,
-  isRequire,
-  type RequireType,
-} from "./utils";
+import { createImport, isPolyfillSource, isRequire } from "./utils";
 
 type Plugin = {
   visitor: Object,
@@ -15,21 +10,22 @@ type Plugin = {
 };
 
 export default function({ types: t }: { types: Object }): Plugin {
-  function createImports(
-    polyfills: Array<string>,
-    requireType: RequireType,
+  function replaceWithPolyfillImports(
+    path: Object,
+    polyfills: Array<string> | Set<string>,
     regenerator: boolean,
-  ): Array<Object> {
-    const items = Array.isArray(polyfills) ? new Set(polyfills) : polyfills;
-    const imports = [];
+  ): void {
+    if (regenerator) {
+      createImport(path, "regenerator-runtime");
+    }
 
-    items.forEach(p => imports.push(createImport(t, p, requireType)));
+    const items = Array.isArray(polyfills) ? new Set(polyfills) : polyfills;
 
-    if (regenerator) {
-      imports.push(createImport(t, "regenerator-runtime", requireType));
+    for (const p of Array.from(items).reverse()) {
+      createImport(path, p);
     }
 
-    return imports;
+    path.remove();
   }
 
   const isPolyfillImport = {
@@ -39,20 +35,21 @@ export default function({ types: t }: { types: Object }): Plugin {
         isPolyfillSource(path.node.source.value)
       ) {
         this.importPolyfillIncluded = true;
-        path.replaceWithMultiple(
-          createImports(state.opts.polyfills, "import", state.opts.regenerator),
+
+        replaceWithPolyfillImports(
+          path,
+          state.opts.polyfills,
+          state.opts.regenerator,
         );
       }
     },
     Program(path, state) {
       path.get("body").forEach(bodyPath => {
         if (isRequire(t, bodyPath)) {
-          bodyPath.replaceWithMultiple(
-            createImports(
-              state.opts.polyfills,
-              "require",
-              state.opts.regenerator,
-            ),
+          replaceWithPolyfillImports(
+            bodyPath,
+            state.opts.polyfills,
+            state.opts.regenerator,
           );
         }
       });
diff --git a/packages/babel-preset-env/src/use-built-ins-plugin.js b/packages/babel-preset-env/src/use-built-ins-plugin.js
index 25ebd661a8922..6fcfe2dbf64a5 100644
--- a/packages/babel-preset-env/src/use-built-ins-plugin.js
+++ b/packages/babel-preset-env/src/use-built-ins-plugin.js
@@ -42,8 +42,7 @@ export default function({ types: t }: { types: Object }): Plugin {
   ): void {
     if (builtIn && !builtIns.has(builtIn)) {
       builtIns.add(builtIn);
-      const programPath = path.find(path => path.isProgram());
-      programPath.unshiftContainer("body", createImport(t, builtIn));
+      createImport(path, builtIn);
     }
   }
 
diff --git a/packages/babel-preset-env/src/utils.js b/packages/babel-preset-env/src/utils.js
index 714ce2d56f9fc..7f08ad109c4af 100644
--- a/packages/babel-preset-env/src/utils.js
+++ b/packages/babel-preset-env/src/utils.js
@@ -1,6 +1,6 @@
 // @flow
-
 import semver from "semver";
+import { addSideEffect } from "@babel/helper-module-imports";
 import unreleasedLabels from "../data/unreleased-labels";
 import { semverMin } from "./targets-parser";
 import type { Targets } from "./types";
@@ -88,15 +88,6 @@ export const filterStageFromList = (list: any, stageList: any) => {
 export const isPolyfillSource = (source: string): boolean =>
   source === "@babel/polyfill" || source === "core-js";
 
-export const isRequire = (t: Object, path: Object): boolean =>
-  t.isExpressionStatement(path.node) &&
-  t.isCallExpression(path.node.expression) &&
-  t.isIdentifier(path.node.expression.callee) &&
-  path.node.expression.callee.name === "require" &&
-  path.node.expression.arguments.length === 1 &&
-  t.isStringLiteral(path.node.expression.arguments[0]) &&
-  isPolyfillSource(path.node.expression.arguments[0].value);
-
 const modulePathMap = {
   "regenerator-runtime": "regenerator-runtime/runtime",
 };
@@ -104,22 +95,14 @@ const modulePathMap = {
 export const getModulePath = (mod: string) =>
   modulePathMap[mod] || `core-js/modules/${mod}`;
 
-export type RequireType = "require" | "import";
-
-export const createImport = (
-  t: Object,
-  polyfill: string,
-  requireType?: RequireType = "import",
-): Object => {
-  const modulePath = getModulePath(polyfill);
+export const createImport = (path: Object, mod: string) =>
+  addSideEffect(path, getModulePath(mod));
 
-  if (requireType === "import") {
-    const declar = t.importDeclaration([], t.stringLiteral(modulePath));
-    declar._blockHoist = 3;
-    return declar;
-  }
-
-  return t.expressionStatement(
-    t.callExpression(t.identifier("require"), [t.stringLiteral(modulePath)]),
-  );
-};
+export const isRequire = (t: Object, path: Object): boolean =>
+  t.isExpressionStatement(path.node) &&
+  t.isCallExpression(path.node.expression) &&
+  t.isIdentifier(path.node.expression.callee) &&
+  path.node.expression.callee.name === "require" &&
+  path.node.expression.arguments.length === 1 &&
+  t.isStringLiteral(path.node.expression.arguments[0]) &&
+  isPolyfillSource(path.node.expression.arguments[0].value);
diff --git a/packages/babel-preset-env/test/debug-fixtures.js b/packages/babel-preset-env/test/debug-fixtures.js
index 288407f8b3467..4b4fcb256978e 100644
--- a/packages/babel-preset-env/test/debug-fixtures.js
+++ b/packages/babel-preset-env/test/debug-fixtures.js
@@ -76,6 +76,16 @@ const buildTest = opts => {
 };
 
 describe("debug output", () => {
+  let cwd;
+
+  beforeEach(() => {
+    cwd = process.cwd();
+  });
+
+  afterEach(() => {
+    process.chdir(cwd);
+  });
+
   fs.readdirSync(fixtureLoc).forEach(testName => {
     if (testName.slice(0, 1) === ".") return;
     const testLoc = path.join(fixtureLoc, testName);
diff --git a/packages/babel-preset-env/test/debug-fixtures/android/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/android/stdout.txt
index 00a05762c351d..7d2e24133dea8 100644
--- a/packages/babel-preset-env/test/debug-fixtures/android/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/android/stdout.txt
@@ -133,4 +133,4 @@ Using polyfills with `entry` option:
   web.timers { "android":"4" }
   web.immediate { "android":"4" }
   web.dom.iterable { "android":"4" }
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/builtins-no-import/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/builtins-no-import/stdout.txt
index 7f1e819d315f3..d3c444f086407 100644
--- a/packages/babel-preset-env/test/debug-fixtures/builtins-no-import/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/builtins-no-import/stdout.txt
@@ -18,4 +18,4 @@ Using plugins:
 Using polyfills with `entry` option:
 
 [src/in.js] `import '@babel/polyfill'` was not found.
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/builtins-uglify/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/builtins-uglify/stdout.txt
index 5fee15ef63383..78d1d4feea006 100644
--- a/packages/babel-preset-env/test/debug-fixtures/builtins-uglify/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/builtins-uglify/stdout.txt
@@ -44,4 +44,4 @@ Using polyfills with `entry` option:
   web.timers { "chrome":"55" }
   web.immediate { "chrome":"55" }
   web.dom.iterable { "chrome":"55" }
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/builtins/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/builtins/stdout.txt
index cefe457b70f6e..5dc6d89ae660e 100644
--- a/packages/babel-preset-env/test/debug-fixtures/builtins/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/builtins/stdout.txt
@@ -135,4 +135,4 @@ Using polyfills with `entry` option:
   web.timers { "chrome":"54", "ie":"10", "node":"6" }
   web.immediate { "chrome":"54", "ie":"10", "node":"6" }
   web.dom.iterable { "chrome":"54", "ie":"10", "node":"6" }
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/electron/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/electron/stdout.txt
index 27f90400617c2..d670e5d54fde7 100644
--- a/packages/babel-preset-env/test/debug-fixtures/electron/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/electron/stdout.txt
@@ -92,4 +92,4 @@ Using polyfills with `entry` option:
   web.timers { "electron":"0.36" }
   web.immediate { "electron":"0.36" }
   web.dom.iterable { "electron":"0.36" }
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/force-all-transforms/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/force-all-transforms/stdout.txt
index a6ca17fbd939f..9ca9e9357d8f6 100644
--- a/packages/babel-preset-env/test/debug-fixtures/force-all-transforms/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/force-all-transforms/stdout.txt
@@ -41,4 +41,4 @@ Using polyfills with `entry` option:
   web.timers { "chrome":"55" }
   web.immediate { "chrome":"55" }
   web.dom.iterable { "chrome":"55" }
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/plugins-only/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/plugins-only/stdout.txt
index 6fb8c6144d347..7e9e7ff3e2cd5 100644
--- a/packages/babel-preset-env/test/debug-fixtures/plugins-only/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/plugins-only/stdout.txt
@@ -23,4 +23,4 @@ Using plugins:
   transform-dotall-regex { "firefox":"52", "node":"7.4" }
 
 Using polyfills: No polyfills were added, since the `useBuiltIns` option was not set.
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/shippedProposals-chrome60/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/shippedProposals-chrome60/stdout.txt
index 9e2f76c707439..c6f1945e61893 100644
--- a/packages/babel-preset-env/test/debug-fixtures/shippedProposals-chrome60/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/shippedProposals-chrome60/stdout.txt
@@ -19,7 +19,8 @@ Using polyfills with `entry` option:
 [src/in.js] Replaced `@babel/polyfill` with the following polyfills:
   es6.array.sort { "chrome":"60" }
   es7.promise.finally { "chrome":"60" }
+  es7.symbol.async-iterator { "chrome":"60" }
   web.timers { "chrome":"60" }
   web.immediate { "chrome":"60" }
   web.dom.iterable { "chrome":"60" }
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/shippedProposals/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/shippedProposals/stdout.txt
index 150d19dd1441a..a3932e2a7ebf9 100644
--- a/packages/babel-preset-env/test/debug-fixtures/shippedProposals/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/shippedProposals/stdout.txt
@@ -150,7 +150,8 @@ Using polyfills with `entry` option:
   es7.string.pad-start {}
   es7.string.pad-end {}
   es7.promise.finally {}
+  es7.symbol.async-iterator {}
   web.timers {}
   web.immediate {}
   web.dom.iterable {}
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/specific-targets/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/specific-targets/stdout.txt
index 29a17fe714ca3..0e69225c32814 100644
--- a/packages/babel-preset-env/test/debug-fixtures/specific-targets/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/specific-targets/stdout.txt
@@ -139,4 +139,4 @@ Using polyfills with `entry` option:
   web.timers { "chrome":"54", "edge":"13", "firefox":"49", "ie":"10", "ios":"9", "safari":"7" }
   web.immediate { "chrome":"54", "edge":"13", "firefox":"49", "ie":"10", "ios":"9", "safari":"7" }
   web.dom.iterable { "chrome":"54", "edge":"13", "firefox":"49", "ie":"10", "ios":"9", "safari":"7" }
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/usage-none/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/usage-none/stdout.txt
index 1d80cac70ef6b..830016841e853 100644
--- a/packages/babel-preset-env/test/debug-fixtures/usage-none/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/usage-none/stdout.txt
@@ -36,7 +36,6 @@ Using plugins:
 Using polyfills with `usage` option:
 
 [src/in.js] Based on your code and targets, none were added.
-src/in.js -> lib/in.js
 
 [src/in2.js] Based on your code and targets, none were added.
-src/in2.js -> lib/in2.js
\ No newline at end of file
+🎉  Successfully compiled 2 files with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/usage-with-import/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/usage-with-import/stdout.txt
index 63f953cc27e96..5b4637b417147 100644
--- a/packages/babel-preset-env/test/debug-fixtures/usage-with-import/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/usage-with-import/stdout.txt
@@ -13,4 +13,4 @@ Using plugins:
 Using polyfills with `usage` option:
 
 [src/in.js] Based on your code and targets, none were added.
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/usage/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/usage/stdout.txt
index 4ce33e8da2795..805fec388400b 100644
--- a/packages/babel-preset-env/test/debug-fixtures/usage/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/usage/stdout.txt
@@ -38,9 +38,8 @@ Using polyfills with `usage` option:
 [src/in.js] Added following polyfills:
   es6.promise { "ie":"11" }
   es6.map { "firefox":"50", "ie":"11" }
-src/in.js -> lib/in.js
 
 [src/in2.js] Added following polyfills:
   regenerator-runtime { "chrome":"52", "firefox":"50", "ie":"11" }
   web.dom.iterable { "chrome":"52", "firefox":"50", "ie":"11" }
-src/in2.js -> lib/in2.js
\ No newline at end of file
+🎉  Successfully compiled 2 files with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/versions-decimals/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/versions-decimals/stdout.txt
index 81048c38d3dba..810d24c691a60 100644
--- a/packages/babel-preset-env/test/debug-fixtures/versions-decimals/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/versions-decimals/stdout.txt
@@ -161,4 +161,4 @@ Using polyfills with `entry` option:
   web.timers { "chrome":"54", "electron":"0.36", "ie":"10", "node":"6.1" }
   web.immediate { "chrome":"54", "electron":"0.36", "ie":"10", "node":"6.1" }
   web.dom.iterable { "chrome":"54", "electron":"0.36", "ie":"10", "node":"6.1" }
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/debug-fixtures/versions-strings/stdout.txt b/packages/babel-preset-env/test/debug-fixtures/versions-strings/stdout.txt
index 053aba06c23c1..6985edeaa5ad3 100644
--- a/packages/babel-preset-env/test/debug-fixtures/versions-strings/stdout.txt
+++ b/packages/babel-preset-env/test/debug-fixtures/versions-strings/stdout.txt
@@ -135,4 +135,4 @@ Using polyfills with `entry` option:
   web.timers { "chrome":"54", "ie":"10", "node":"6.10" }
   web.immediate { "chrome":"54", "ie":"10", "node":"6.10" }
   web.dom.iterable { "chrome":"54", "ie":"10", "node":"6.10" }
-src/in.js -> lib/in.js
\ No newline at end of file
+🎉  Successfully compiled 1 file with Babel.
diff --git a/packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator-in/input.js b/packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator-in/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator-in/input.js
rename to packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator-in/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator-in/output.js b/packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator-in/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator-in/output.js
rename to packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator-in/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator/input.js b/packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator/input.js
rename to packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator/output.js b/packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator/output.js
rename to packages/babel-preset-env/test/fixtures/dom-iterable/symbol-iterator/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/dom-iterable/yield-non-star/input.js b/packages/babel-preset-env/test/fixtures/dom-iterable/yield-non-star/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/dom-iterable/yield-non-star/input.js
rename to packages/babel-preset-env/test/fixtures/dom-iterable/yield-non-star/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/dom-iterable/yield-non-star/output.js b/packages/babel-preset-env/test/fixtures/dom-iterable/yield-non-star/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/dom-iterable/yield-non-star/output.js
rename to packages/babel-preset-env/test/fixtures/dom-iterable/yield-non-star/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/dom-iterable/yield-star/input.js b/packages/babel-preset-env/test/fixtures/dom-iterable/yield-star/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/dom-iterable/yield-star/input.js
rename to packages/babel-preset-env/test/fixtures/dom-iterable/yield-star/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/dom-iterable/yield-star/output.js b/packages/babel-preset-env/test/fixtures/dom-iterable/yield-star/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/dom-iterable/yield-star/output.js
rename to packages/babel-preset-env/test/fixtures/dom-iterable/yield-star/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/plugin-options/filters-duplicates/input.js b/packages/babel-preset-env/test/fixtures/plugin-options/filters-duplicates/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/plugin-options/filters-duplicates/input.js
rename to packages/babel-preset-env/test/fixtures/plugin-options/filters-duplicates/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/plugin-options/filters-duplicates/output.js b/packages/babel-preset-env/test/fixtures/plugin-options/filters-duplicates/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/plugin-options/filters-duplicates/output.js
rename to packages/babel-preset-env/test/fixtures/plugin-options/filters-duplicates/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/plugin-options/regenerator-false/input.js b/packages/babel-preset-env/test/fixtures/plugin-options/regenerator-false/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/plugin-options/regenerator-false/input.js
rename to packages/babel-preset-env/test/fixtures/plugin-options/regenerator-false/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/plugin-options/regenerator-true/input.js b/packages/babel-preset-env/test/fixtures/plugin-options/regenerator-true/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/plugin-options/regenerator-true/input.js
rename to packages/babel-preset-env/test/fixtures/plugin-options/regenerator-true/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/plugin-options/regenerator-true/output.js b/packages/babel-preset-env/test/fixtures/plugin-options/regenerator-true/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/plugin-options/regenerator-true/output.js
rename to packages/babel-preset-env/test/fixtures/plugin-options/regenerator-true/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/exec.js b/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/exec.js
new file mode 100644
index 0000000000000..928ee1da87b77
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/exec.js
@@ -0,0 +1,6 @@
+class MyDate extends Date {
+  constructor(time) {
+      super(time);
+  }
+}
+let myDate = new MyDate();
diff --git a/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/input.mjs b/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/input.mjs
new file mode 100644
index 0000000000000..928ee1da87b77
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/input.mjs
@@ -0,0 +1,6 @@
+class MyDate extends Date {
+  constructor(time) {
+      super(time);
+  }
+}
+let myDate = new MyDate();
diff --git a/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/options.json b/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/options.json
new file mode 100644
index 0000000000000..5506781ec8a96
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/options.json
@@ -0,0 +1,4 @@
+{
+  "plugins": [],
+  "presets": ["../../../../lib"]
+}
\ No newline at end of file
diff --git a/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/output.js b/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/output.js
new file mode 100644
index 0000000000000..0e08c36ad7920
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/plugins-integration/issue-7527/output.js
@@ -0,0 +1,35 @@
+"use strict";
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+
+function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
+
+function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
+
+function _gPO(o) { _gPO = Object.getPrototypeOf || function _gPO(o) { return o.__proto__; }; return _gPO(o); }
+
+function _sPO(o, p) { _sPO = Object.setPrototypeOf || function _sPO(o, p) { o.__proto__ = p; return o; }; return _sPO(o, p); }
+
+function _construct(Parent, args, Class) { _construct = (typeof Reflect === "undefined" ? "undefined" : _typeof(Reflect)) === "object" && Reflect.construct || function _construct(Parent, args, Class) { var Constructor, a = [null]; a.push.apply(a, args); Constructor = Parent.bind.apply(Parent, a); return _sPO(new Constructor(), Class.prototype); }; return _construct(Parent, args, Class); }
+
+function _wrapNativeSuper(Class) { var _cache = typeof Map === "function" ? new Map() : undefined; _wrapNativeSuper = function _wrapNativeSuper(Class) { if (typeof Class !== "function") { throw new TypeError("Super expression must either be null or a function"); } if (typeof _cache !== "undefined") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() {} Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writable: true, configurable: true } }); return _sPO(Wrapper, _sPO(function Super() { return _construct(Class, arguments, _gPO(this).constructor); }, Class)); }; return _wrapNativeSuper(Class); }
+
+var MyDate =
+/*#__PURE__*/
+function (_Date) {
+  _inherits(MyDate, _Date);
+
+  function MyDate(time) {
+    _classCallCheck(this, MyDate);
+
+    return _possibleConstructorReturn(this, (MyDate.__proto__ || Object.getPrototypeOf(MyDate)).call(this, time));
+  }
+
+  return MyDate;
+}(_wrapNativeSuper(Date));
+
+var myDate = new MyDate();
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-false/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-false/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-false/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-false/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-false/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-false/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-false/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-false/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-class-methods/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-class-methods/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-class-methods/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-class-methods/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-class-methods/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-class-methods/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-class-methods/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-class-methods/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-instance-methods/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-instance-methods/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-instance-methods/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-instance-methods/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-instance-methods/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-instance-methods/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-instance-methods/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-evaluated-instance-methods/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods-native-support/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods-native-support/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods-native-support/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods-native-support/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods-native-support/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods-native-support/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods-native-support/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods-native-support/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-instance-methods/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-native-support/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-native-support/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-native-support/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-native-support/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-native-support/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-native-support/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-native-support/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used-native-support/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/builtins-used/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-with/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-with/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-with/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-with/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-with/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-with/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-with/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-with/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-without/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-without/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-without/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-without/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-without/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-without/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-without/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/for-of-destructure-without/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/no-builtins-used/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/no-builtins-used/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/no-builtins-used/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/no-builtins-used/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/no-builtins-used/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/no-builtins-used/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/no-builtins-used/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/no-builtins-used/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/number-ie11/input.mjs b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/number-ie11/input.mjs
new file mode 100644
index 0000000000000..f71c85f35e63c
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/number-ie11/input.mjs
@@ -0,0 +1,2 @@
+Number.parseFloat("3.14");
+Number.parseInt("10");
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/number-ie11/options.json b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/number-ie11/options.json
new file mode 100644
index 0000000000000..a7327659bd855
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/number-ie11/options.json
@@ -0,0 +1,14 @@
+{
+  "presets": [
+    [
+      "../../../../lib",
+      {
+        "targets": {
+          "ie": "11"
+        },
+        "useBuiltIns": "usage",
+        "modules": false
+      }
+    ]
+  ]
+}
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/number-ie11/output.mjs b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/number-ie11/output.mjs
new file mode 100644
index 0000000000000..315a46476ddf8
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/number-ie11/output.mjs
@@ -0,0 +1,4 @@
+import "core-js/modules/es6.number.parse-int";
+import "core-js/modules/es6.number.parse-float";
+Number.parseFloat("3.14");
+Number.parseInt("10");
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-all/input.mjs b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-all/input.mjs
new file mode 100644
index 0000000000000..0fef928e163de
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-all/input.mjs
@@ -0,0 +1,4 @@
+var p = Promise.resolve(0);
+Promise.all([p]).then(outcome => {
+  alert("OK");
+});
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-all/options.json b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-all/options.json
new file mode 100644
index 0000000000000..eeb3ed89dd1fd
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-all/options.json
@@ -0,0 +1,14 @@
+{
+  "presets": [
+    [
+      "../../../../lib",
+      {
+        "targets": {
+          "browsers": ["ie > 10"]
+        },
+        "useBuiltIns": "usage",
+        "modules": false
+      }
+    ]
+  ]
+}
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-all/output.mjs b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-all/output.mjs
new file mode 100644
index 0000000000000..3c6e6de8aacb6
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-all/output.mjs
@@ -0,0 +1,6 @@
+import "core-js/modules/web.dom.iterable";
+import "core-js/modules/es6.promise";
+var p = Promise.resolve(0);
+Promise.all([p]).then(function (outcome) {
+  alert("OK");
+});
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-race/input.mjs b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-race/input.mjs
new file mode 100644
index 0000000000000..334252838bc0a
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-race/input.mjs
@@ -0,0 +1,4 @@
+var p = Promise.resolve(0);
+Promise.race([p]).then(outcome => {
+  alert("OK");
+});
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-race/options.json b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-race/options.json
new file mode 100644
index 0000000000000..eeb3ed89dd1fd
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-race/options.json
@@ -0,0 +1,14 @@
+{
+  "presets": [
+    [
+      "../../../../lib",
+      {
+        "targets": {
+          "browsers": ["ie > 10"]
+        },
+        "useBuiltIns": "usage",
+        "modules": false
+      }
+    ]
+  ]
+}
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-race/output.mjs b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-race/output.mjs
new file mode 100644
index 0000000000000..42d9a206b3192
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/promise-race/output.mjs
@@ -0,0 +1,6 @@
+import "core-js/modules/web.dom.iterable";
+import "core-js/modules/es6.promise";
+var p = Promise.resolve(0);
+Promise.race([p]).then(function (outcome) {
+  alert("OK");
+});
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async-native-support/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async-native-support/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async-native-support/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async-native-support/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async-native-support/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async-native-support/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async-native-support/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async-native-support/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-async/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator-native-support/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator-native-support/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator-native-support/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator-native-support/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator-native-support/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator-native-support/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator-native-support/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator-native-support/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/regenerator-used-generator/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/remove-babel-polyfill-import/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/remove-babel-polyfill-import/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/remove-babel-polyfill-import/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/remove-babel-polyfill-import/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/source-type-script/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/source-type-script/input.js
new file mode 100644
index 0000000000000..39f9e5858b8c0
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/source-type-script/input.js
@@ -0,0 +1,8 @@
+require("foo");
+
+const x = new Promise(resolve => {
+  const p = [];
+
+  if (p.includes("a")) {
+  }
+});
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/source-type-script/options.json b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/source-type-script/options.json
new file mode 100644
index 0000000000000..a92e3abd7a6c8
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/source-type-script/options.json
@@ -0,0 +1,12 @@
+{
+  "presets": [
+    ["../../../../lib", {
+      "modules": false,
+      "targets": {
+        "node": "4.0.0"
+      },
+      "useBuiltIns": "usage",
+      "shippedProposals": true
+    }]
+  ]
+}
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/source-type-script/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/source-type-script/output.js
new file mode 100644
index 0000000000000..d98c7e41c6af5
--- /dev/null
+++ b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/source-type-script/output.js
@@ -0,0 +1,11 @@
+require("core-js/modules/es7.array.includes");
+
+require("core-js/modules/es6.promise");
+
+require("foo");
+
+var x = new Promise(function (resolve) {
+  var p = [];
+
+  if (p.includes("a")) {}
+});
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-tranform/input.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-transform/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-tranform/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-transform/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-tranform/options.json b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-transform/options.json
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-tranform/options.json
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-transform/options.json
diff --git a/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-tranform/output.js b/packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-transform/output.js
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-tranform/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options-add-used-built-ins/test-modules-transform/output.js
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config-ignore-with-false/input.js b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config-ignore-with-false/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/browserslist-config-ignore-with-false/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/browserslist-config-ignore-with-false/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config-ignore-with-false/output.js b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config-ignore-with-false/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/browserslist-config-ignore-with-false/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/browserslist-config-ignore-with-false/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/input.js b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/options.json b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/options.json
index f048ce5e36d88..1545c51ee962c 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/options.json
+++ b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/options.json
@@ -1,7 +1,7 @@
 {
   "presets": [
     ["../../../../lib", {
-      "configPath": "../fixtures/preset-options/browserslist-config",
+      "configPath": "packages/babel-preset-env/test/fixtures/preset-options/browserslist-config",
       "modules": false
     }]
   ]
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/output.js b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package-ignore-with-array/input.js b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package-ignore-with-array/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/browserslist-package-ignore-with-array/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/browserslist-package-ignore-with-array/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package-ignore-with-array/output.js b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package-ignore-with-array/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/browserslist-package-ignore-with-array/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/browserslist-package-ignore-with-array/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/input.js b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/options.json b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/options.json
index 04183bdbd1b58..c10fd049d797a 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/options.json
+++ b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/options.json
@@ -1,7 +1,7 @@
 {
   "presets": [
     ["../../../../lib", {
-      "configPath": "../fixtures/preset-options/browserslist-package",
+      "configPath": "packages/babel-preset-env/test/fixtures/preset-options/browserslist-package",
       "targets": {
         "chrome": 55
       },
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/output.js b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/core-js/input.js b/packages/babel-preset-env/test/fixtures/preset-options/core-js/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/core-js/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/core-js/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/core-js/output.js b/packages/babel-preset-env/test/fixtures/preset-options/core-js/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/core-js/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/core-js/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/electron/input.js b/packages/babel-preset-env/test/fixtures/preset-options/electron/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/electron/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/electron/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/electron/output.js b/packages/babel-preset-env/test/fixtures/preset-options/electron/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/electron/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/electron/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/empty-options/input.js b/packages/babel-preset-env/test/fixtures/preset-options/empty-options/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/empty-options/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/empty-options/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/empty-options/output.js b/packages/babel-preset-env/test/fixtures/preset-options/empty-options/output.js
index 2c64b68bbb728..b298c5e19dd96 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/empty-options/output.js
+++ b/packages/babel-preset-env/test/fixtures/preset-options/empty-options/output.js
@@ -1 +1,3 @@
+"use strict";
+
 var a = "1";
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/exclude-built-ins/input.js b/packages/babel-preset-env/test/fixtures/preset-options/exclude-built-ins/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/exclude-built-ins/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/exclude-built-ins/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/exclude-include/input.js b/packages/babel-preset-env/test/fixtures/preset-options/exclude-include/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/exclude-include/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/exclude-include/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/exclude-include/output.js b/packages/babel-preset-env/test/fixtures/preset-options/exclude-include/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/exclude-include/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/exclude-include/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/exclude-regenerator/input.js b/packages/babel-preset-env/test/fixtures/preset-options/exclude-regenerator/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/exclude-regenerator/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/exclude-regenerator/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/exclude-regenerator/output.js b/packages/babel-preset-env/test/fixtures/preset-options/exclude-regenerator/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/exclude-regenerator/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/exclude-regenerator/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/exclude/input.js b/packages/babel-preset-env/test/fixtures/preset-options/exclude/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/exclude/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/exclude/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/exclude/output.js b/packages/babel-preset-env/test/fixtures/preset-options/exclude/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/exclude/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/exclude/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/force-all-transforms/input.js b/packages/babel-preset-env/test/fixtures/preset-options/force-all-transforms/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/force-all-transforms/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/force-all-transforms/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/force-all-transforms/output.js b/packages/babel-preset-env/test/fixtures/preset-options/force-all-transforms/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/force-all-transforms/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/force-all-transforms/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/ie-11-built-ins/input.js b/packages/babel-preset-env/test/fixtures/preset-options/ie-11-built-ins/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/ie-11-built-ins/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/ie-11-built-ins/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/ie-11-built-ins/output.js b/packages/babel-preset-env/test/fixtures/preset-options/ie-11-built-ins/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/ie-11-built-ins/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/ie-11-built-ins/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/include-built-ins/input.js b/packages/babel-preset-env/test/fixtures/preset-options/include-built-ins/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/include-built-ins/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/include-built-ins/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/include-built-ins/output.js b/packages/babel-preset-env/test/fixtures/preset-options/include-built-ins/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/include-built-ins/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/include-built-ins/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/include/input.js b/packages/babel-preset-env/test/fixtures/preset-options/include/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/include/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/include/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/include/output.js b/packages/babel-preset-env/test/fixtures/preset-options/include/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/include/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/include/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/ios-10/input.js b/packages/babel-preset-env/test/fixtures/preset-options/ios-10/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/ios-10/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/ios-10/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/ios-10/output.js b/packages/babel-preset-env/test/fixtures/preset-options/ios-10/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/ios-10/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/ios-10/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/ios-6/input.js b/packages/babel-preset-env/test/fixtures/preset-options/ios-6/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/ios-6/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/ios-6/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/loose-typeof-symbol/input.js b/packages/babel-preset-env/test/fixtures/preset-options/loose-typeof-symbol/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/loose-typeof-symbol/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/loose-typeof-symbol/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/loose-typeof-symbol/output.js b/packages/babel-preset-env/test/fixtures/preset-options/loose-typeof-symbol/output.js
index 6d69e92eaa36c..565dccdd11658 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/loose-typeof-symbol/output.js
+++ b/packages/babel-preset-env/test/fixtures/preset-options/loose-typeof-symbol/output.js
@@ -1 +1,3 @@
+"use strict";
+
 typeof Symbol();
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/loose-with-typeof-symbol-includes/input.js b/packages/babel-preset-env/test/fixtures/preset-options/loose-with-typeof-symbol-includes/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/loose-with-typeof-symbol-includes/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/loose-with-typeof-symbol-includes/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/loose-with-typeof-symbol-includes/output.js b/packages/babel-preset-env/test/fixtures/preset-options/loose-with-typeof-symbol-includes/output.js
index 35d292f43c1c5..47a605e274102 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/loose-with-typeof-symbol-includes/output.js
+++ b/packages/babel-preset-env/test/fixtures/preset-options/loose-with-typeof-symbol-includes/output.js
@@ -1,3 +1,5 @@
+"use strict";
+
 function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
 
 _typeof(Symbol());
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/modules-amd-loose/input.js b/packages/babel-preset-env/test/fixtures/preset-options/modules-amd-loose/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/modules-amd-loose/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/modules-amd-loose/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/modules-cjs/input.js b/packages/babel-preset-env/test/fixtures/preset-options/modules-cjs/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/modules-cjs/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/modules-cjs/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/modules-commonjs/input.js b/packages/babel-preset-env/test/fixtures/preset-options/modules-commonjs/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/modules-commonjs/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/modules-commonjs/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/modules-false/input.js b/packages/babel-preset-env/test/fixtures/preset-options/modules-false/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/modules-false/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/modules-false/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/modules-false/output.js b/packages/babel-preset-env/test/fixtures/preset-options/modules-false/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/modules-false/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/modules-false/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/modules-systemjs/input.js b/packages/babel-preset-env/test/fixtures/preset-options/modules-systemjs/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/modules-systemjs/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/modules-systemjs/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/modules-systemjs/output.js b/packages/babel-preset-env/test/fixtures/preset-options/modules-systemjs/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/modules-systemjs/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/modules-systemjs/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/modules-umd/input.js b/packages/babel-preset-env/test/fixtures/preset-options/modules-umd/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/modules-umd/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/modules-umd/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/no-options/input.js b/packages/babel-preset-env/test/fixtures/preset-options/no-options/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/no-options/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/no-options/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/no-options/output.js b/packages/babel-preset-env/test/fixtures/preset-options/no-options/output.js
index 2c64b68bbb728..b298c5e19dd96 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/no-options/output.js
+++ b/packages/babel-preset-env/test/fixtures/preset-options/no-options/output.js
@@ -1 +1,3 @@
+"use strict";
+
 var a = "1";
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/no-transform/input.js b/packages/babel-preset-env/test/fixtures/preset-options/no-transform/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/no-transform/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/no-transform/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/no-transform/output.js b/packages/babel-preset-env/test/fixtures/preset-options/no-transform/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/no-transform/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/no-transform/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-entry/output.js b/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-entry/output.js
index af88590c74302..0c600cdd7be2d 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-entry/output.js
+++ b/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-entry/output.js
@@ -1,3 +1,9 @@
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
+
 function _awaitAsyncGenerator(value) { return new _AwaitValue(value); }
 
 function _wrapAsyncGenerator(fn) { return function () { return new _AsyncGenerator(fn.apply(this, arguments)); }; }
@@ -14,8 +20,6 @@ _AsyncGenerator.prototype.return = function (arg) { return this._invoke("return"
 
 function _AwaitValue(value) { this.wrapped = value; }
 
-function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
-
 var _x$y$a$b = {
   x: 1,
   y: 2,
@@ -26,7 +30,7 @@ var _x$y$a$b = {
     y = _x$y$a$b.y,
     z = _objectWithoutProperties(_x$y$a$b, ["x", "y"]);
 
-var n = Object.assign({
+var n = _objectSpread({
   x: x,
   y: y
 }, z);
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/options.json b/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/options.json
index d1b9e87480134..c67678705d2a5 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/options.json
+++ b/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/options.json
@@ -1,4 +1,5 @@
 {
+  "sourceType": "module",
   "presets": [
     ["../../../../lib", {
       "shippedProposals": true,
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/output.js b/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/output.js
index 8ad03ca549e26..3f72aaa90249f 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/output.js
+++ b/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals-use-builtins-usage/output.js
@@ -1,14 +1,24 @@
 "use strict";
 
+require("core-js/modules/es6.array.for-each");
+
+require("core-js/modules/es6.array.filter");
+
+require("core-js/modules/es6.array.index-of");
+
 require("regenerator-runtime/runtime");
 
+require("core-js/modules/es7.symbol.async-iterator");
+
 require("core-js/modules/es6.symbol");
 
 require("core-js/modules/es6.promise");
 
-require("core-js/modules/es6.array.index-of");
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
 
-require("core-js/modules/es6.object.assign");
+function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
 
 function _awaitAsyncGenerator(value) { return new _AwaitValue(value); }
 
@@ -26,8 +36,6 @@ _AsyncGenerator.prototype.return = function (arg) { return this._invoke("return"
 
 function _AwaitValue(value) { this.wrapped = value; }
 
-function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
-
 var _x$y$a$b = {
   x: 1,
   y: 2,
@@ -38,7 +46,7 @@ var _x$y$a$b = {
     y = _x$y$a$b.y,
     z = _objectWithoutProperties(_x$y$a$b, ["x", "y"]);
 
-var n = Object.assign({
+var n = _objectSpread({
   x: x,
   y: y
 }, z);
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals/output.js b/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals/output.js
index 4088c6e0c315b..0c600cdd7be2d 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals/output.js
+++ b/packages/babel-preset-env/test/fixtures/preset-options/shippedProposals/output.js
@@ -1,3 +1,9 @@
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
+
 function _awaitAsyncGenerator(value) { return new _AwaitValue(value); }
 
 function _wrapAsyncGenerator(fn) { return function () { return new _AsyncGenerator(fn.apply(this, arguments)); }; }
@@ -14,10 +20,6 @@ _AsyncGenerator.prototype.return = function (arg) { return this._invoke("return"
 
 function _AwaitValue(value) { this.wrapped = value; }
 
-function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
-
-function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
-
 var _x$y$a$b = {
   x: 1,
   y: 2,
@@ -28,7 +30,7 @@ var _x$y$a$b = {
     y = _x$y$a$b.y,
     z = _objectWithoutProperties(_x$y$a$b, ["x", "y"]);
 
-var n = _extends({
+var n = _objectSpread({
   x: x,
   y: y
 }, z);
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-all/input.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-all/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-all/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-all/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-all/output.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-all/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-all/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-all/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-48/input.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-48/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-48/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-48/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-48/output.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-48/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-48/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-48/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-49/input.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-49/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-49/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-49/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-49/output.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-49/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-49/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chrome-49/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chromeandroid/input.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chromeandroid/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chromeandroid/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chromeandroid/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chromeandroid/output.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chromeandroid/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chromeandroid/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-chromeandroid/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-ie-9/input.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-ie-9/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-ie-9/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-ie-9/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-ie-9/output.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-ie-9/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-ie-9/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-ie-9/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-import/input.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-import/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-import/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-import/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-import/output.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-import/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-import/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-import/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node-web/input.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node-web/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node-web/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node-web/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node-web/output.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node-web/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node-web/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node-web/output.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node/input.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node/input.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node/input.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node/input.mjs
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node/output.js b/packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node/output.mjs
similarity index 100%
rename from packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node/output.js
rename to packages/babel-preset-env/test/fixtures/preset-options/use-builtins-node/output.mjs
diff --git a/packages/babel-preset-env/test/targets-parser.spec.js b/packages/babel-preset-env/test/targets-parser.spec.js
index d1144ea9936cf..ae000a2b6e2e3 100644
--- a/packages/babel-preset-env/test/targets-parser.spec.js
+++ b/packages/babel-preset-env/test/targets-parser.spec.js
@@ -1,5 +1,5 @@
 import assert from "assert";
-import getTargets from "../src/targets-parser";
+import getTargets from "../lib/targets-parser";
 
 describe("getTargets", () => {
   it("parses", () => {
@@ -87,6 +87,7 @@ describe("getTargets", () => {
         {
           chrome: "61.0.0",
           safari: "10.1.0",
+          firefox: "60.0.0",
           ios: "10.3.0",
           edge: "16.0.0",
         },
@@ -102,6 +103,7 @@ describe("getTargets", () => {
         {
           chrome: "61.0.0",
           safari: "10.1.0",
+          firefox: "60.0.0",
           ios: "10.3.0",
           edge: "16.0.0",
         },
@@ -117,6 +119,7 @@ describe("getTargets", () => {
         {
           chrome: "61.0.0",
           safari: "10.1.0",
+          firefox: "60.0.0",
           ios: "10.3.0",
           ie: "11.0.0",
           edge: "16.0.0",
@@ -137,6 +140,7 @@ describe("getTargets", () => {
           ios: "10.3.0",
           ie: "11.0.0",
           edge: "16.0.0",
+          firefox: "60.0.0",
         },
       );
     });
diff --git a/packages/babel-preset-es2015/package.json b/packages/babel-preset-es2015/package.json
index 297c3abdc664a..c03f75e38b876 100644
--- a/packages/babel-preset-es2015/package.json
+++ b/packages/babel-preset-es2015/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-es2015",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel preset for all es2015 plugins.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,37 +8,38 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-es2015",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/plugin-transform-arrow-functions": "7.0.0-beta.39",
-    "@babel/plugin-transform-block-scoped-functions": "7.0.0-beta.39",
-    "@babel/plugin-transform-block-scoping": "7.0.0-beta.39",
-    "@babel/plugin-transform-classes": "7.0.0-beta.39",
-    "@babel/plugin-transform-computed-properties": "7.0.0-beta.39",
-    "@babel/plugin-transform-destructuring": "7.0.0-beta.39",
-    "@babel/plugin-transform-duplicate-keys": "7.0.0-beta.39",
-    "@babel/plugin-transform-for-of": "7.0.0-beta.39",
-    "@babel/plugin-transform-function-name": "7.0.0-beta.39",
-    "@babel/plugin-transform-instanceof": "7.0.0-beta.39",
-    "@babel/plugin-transform-literals": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-amd": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-commonjs": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-systemjs": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-umd": "7.0.0-beta.39",
-    "@babel/plugin-transform-object-super": "7.0.0-beta.39",
-    "@babel/plugin-transform-parameters": "7.0.0-beta.39",
-    "@babel/plugin-transform-regenerator": "7.0.0-beta.39",
-    "@babel/plugin-transform-shorthand-properties": "7.0.0-beta.39",
-    "@babel/plugin-transform-spread": "7.0.0-beta.39",
-    "@babel/plugin-transform-sticky-regex": "7.0.0-beta.39",
-    "@babel/plugin-transform-template-literals": "7.0.0-beta.39",
-    "@babel/plugin-transform-typeof-symbol": "7.0.0-beta.39",
-    "@babel/plugin-transform-unicode-regex": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-transform-arrow-functions": "7.0.0-beta.42",
+    "@babel/plugin-transform-block-scoped-functions": "7.0.0-beta.42",
+    "@babel/plugin-transform-block-scoping": "7.0.0-beta.42",
+    "@babel/plugin-transform-classes": "7.0.0-beta.42",
+    "@babel/plugin-transform-computed-properties": "7.0.0-beta.42",
+    "@babel/plugin-transform-destructuring": "7.0.0-beta.42",
+    "@babel/plugin-transform-duplicate-keys": "7.0.0-beta.42",
+    "@babel/plugin-transform-for-of": "7.0.0-beta.42",
+    "@babel/plugin-transform-function-name": "7.0.0-beta.42",
+    "@babel/plugin-transform-instanceof": "7.0.0-beta.42",
+    "@babel/plugin-transform-literals": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-amd": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-commonjs": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-systemjs": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-umd": "7.0.0-beta.42",
+    "@babel/plugin-transform-object-super": "7.0.0-beta.42",
+    "@babel/plugin-transform-parameters": "7.0.0-beta.42",
+    "@babel/plugin-transform-regenerator": "7.0.0-beta.42",
+    "@babel/plugin-transform-shorthand-properties": "7.0.0-beta.42",
+    "@babel/plugin-transform-spread": "7.0.0-beta.42",
+    "@babel/plugin-transform-sticky-regex": "7.0.0-beta.42",
+    "@babel/plugin-transform-template-literals": "7.0.0-beta.42",
+    "@babel/plugin-transform-typeof-symbol": "7.0.0-beta.42",
+    "@babel/plugin-transform-unicode-regex": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39",
-    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42",
+    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-preset-es2015/src/index.js b/packages/babel-preset-es2015/src/index.js
index a80bf685eed9c..8fcedf63c3126 100644
--- a/packages/babel-preset-es2015/src/index.js
+++ b/packages/babel-preset-es2015/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import transformES2015TemplateLiterals from "@babel/plugin-transform-template-literals";
 import transformES2015Literals from "@babel/plugin-transform-literals";
 import transformES2015FunctionName from "@babel/plugin-transform-function-name";
@@ -23,7 +24,9 @@ import transformES2015ModulesUMD from "@babel/plugin-transform-modules-umd";
 import transformES2015Instanceof from "@babel/plugin-transform-instanceof";
 import transformRegenerator from "@babel/plugin-transform-regenerator";
 
-export default function(api, opts = {}) {
+export default declare((api, opts) => {
+  api.assertVersion(7);
+
   const moduleTypes = ["commonjs", "cjs", "amd", "umd", "systemjs"];
   let loose = false;
   let modules = "commonjs";
@@ -82,4 +85,4 @@ export default function(api, opts = {}) {
       [transformRegenerator, { async: false, asyncGenerators: false }],
     ].filter(Boolean), // filter out falsy values
   };
-}
+});
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/empty-options/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/empty-options/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/empty-options/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/empty-options/input.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/loose-false/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/loose-false/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/loose-false/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/loose-false/input.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/loose/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/loose/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/loose/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/loose/input.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/modules-amd-loose/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/modules-amd-loose/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/modules-amd-loose/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/modules-amd-loose/input.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/modules-cjs/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/modules-cjs/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/modules-cjs/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/modules-cjs/input.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/modules-commonjs/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/modules-commonjs/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/modules-commonjs/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/modules-commonjs/input.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/modules-false/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/modules-false/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/modules-false/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/modules-false/input.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/modules-false/output.js b/packages/babel-preset-es2015/test/fixtures/preset-options/modules-false/output.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/modules-false/output.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/modules-false/output.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/modules-systemjs/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/modules-systemjs/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/modules-systemjs/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/modules-systemjs/input.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/modules-systemjs/output.js b/packages/babel-preset-es2015/test/fixtures/preset-options/modules-systemjs/output.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/modules-systemjs/output.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/modules-systemjs/output.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/modules-umd/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/modules-umd/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/modules-umd/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/modules-umd/input.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/no-options/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/no-options/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/no-options/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/no-options/input.mjs
diff --git a/packages/babel-preset-es2015/test/fixtures/preset-options/string-preset/input.js b/packages/babel-preset-es2015/test/fixtures/preset-options/string-preset/input.mjs
similarity index 100%
rename from packages/babel-preset-es2015/test/fixtures/preset-options/string-preset/input.js
rename to packages/babel-preset-es2015/test/fixtures/preset-options/string-preset/input.mjs
diff --git a/packages/babel-preset-es2015/test/index.js b/packages/babel-preset-es2015/test/index.js
index d09abe717fc4e..10239190a43e6 100644
--- a/packages/babel-preset-es2015/test/index.js
+++ b/packages/babel-preset-es2015/test/index.js
@@ -1,18 +1,19 @@
+import * as babel from "@babel/core";
 import es2015 from "../lib";
 import { expect } from "chai";
 
 describe("es2015 preset", function() {
-  it("doesn't throw with no options passed", function() {
+  it("does throw clear error when no options passed for Babel 6", () => {
     expect(function() {
-      es2015(null);
-    }).not.to.throw();
+      es2015({ version: "6.5.0" });
+    }).to.throw(Error, /Requires Babel "\^7.0.0-0"/);
   });
 
   describe("options", function() {
     describe("loose", function() {
       it("throws on non-boolean value", function() {
         expect(function() {
-          es2015(null, { loose: 1 });
+          babel.transform("", { presets: [[es2015, { loose: 1 }]] });
         }).to.throw(/must be a boolean/);
       });
     });
@@ -20,7 +21,7 @@ describe("es2015 preset", function() {
     describe("spec", function() {
       it("throws on non-boolean value", function() {
         expect(function() {
-          es2015(null, { spec: 1 });
+          babel.transform("", { presets: [[es2015, { spec: 1 }]] });
         }).to.throw(/must be a boolean/);
       });
     });
@@ -28,31 +29,31 @@ describe("es2015 preset", function() {
     describe("modules", function() {
       it("doesn't throw when passing one false", function() {
         expect(function() {
-          es2015(null, { modules: false });
+          babel.transform("", { presets: [[es2015, { modules: false }]] });
         }).not.to.throw();
       });
 
       it("doesn't throw when passing one of: 'commonjs', 'amd', 'umd', 'systemjs", function() {
         expect(function() {
-          es2015(null, { modules: "commonjs" });
+          babel.transform("", { presets: [[es2015, { modules: "commonjs" }]] });
         }).not.to.throw();
 
         expect(function() {
-          es2015(null, { modules: "amd" });
+          babel.transform("", { presets: [[es2015, { modules: "amd" }]] });
         }).not.to.throw();
 
         expect(function() {
-          es2015(null, { modules: "umd" });
+          babel.transform("", { presets: [[es2015, { modules: "umd" }]] });
         }).not.to.throw();
 
         expect(function() {
-          es2015(null, { modules: "systemjs" });
+          babel.transform("", { presets: [[es2015, { modules: "systemjs" }]] });
         }).not.to.throw();
       });
 
       it("throws when passing neither false nor one of: 'commonjs', 'amd', 'umd', 'systemjs'", function() {
         expect(function() {
-          es2015(null, { modules: 1 });
+          babel.transform("", { presets: [[es2015, { modules: 1 }]] });
         }).to.throw();
       });
     });
diff --git a/packages/babel-preset-es2016/package.json b/packages/babel-preset-es2016/package.json
index 4c31765f437ab..beb99f74ab13a 100644
--- a/packages/babel-preset-es2016/package.json
+++ b/packages/babel-preset-es2016/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-es2016",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel preset for all es2016 plugins.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,12 +8,13 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-es2016",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/plugin-transform-exponentiation-operator": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-transform-exponentiation-operator": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-preset-es2016/src/index.js b/packages/babel-preset-es2016/src/index.js
index c246cc3692712..c7dd4b7466534 100644
--- a/packages/babel-preset-es2016/src/index.js
+++ b/packages/babel-preset-es2016/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import transformExponentiationOperator from "@babel/plugin-transform-exponentiation-operator";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     plugins: [transformExponentiationOperator],
   };
-}
+});
diff --git a/packages/babel-preset-es2017/package.json b/packages/babel-preset-es2017/package.json
index 0f77c5a5a8899..a6279d8c7f155 100644
--- a/packages/babel-preset-es2017/package.json
+++ b/packages/babel-preset-es2017/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-es2017",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel preset for all es2017 plugins.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,12 +8,13 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-es2017",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/plugin-transform-async-to-generator": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-transform-async-to-generator": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-preset-es2017/src/index.js b/packages/babel-preset-es2017/src/index.js
index 1acaae9254fc3..ac07e6afc366d 100644
--- a/packages/babel-preset-es2017/src/index.js
+++ b/packages/babel-preset-es2017/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import transformAsyncToGenerator from "@babel/plugin-transform-async-to-generator";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     plugins: [transformAsyncToGenerator],
   };
-}
+});
diff --git a/packages/babel-preset-flow/package.json b/packages/babel-preset-flow/package.json
index 4f60a6e4d43fb..4d6561d973d2d 100644
--- a/packages/babel-preset-flow/package.json
+++ b/packages/babel-preset-flow/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-flow",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel preset for all Flow plugins.",
   "author": "James Kyle <me@thejameskyle.com>",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-flow",
@@ -13,13 +13,14 @@
     "types"
   ],
   "dependencies": {
-    "@babel/plugin-transform-flow-strip-types": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-transform-flow-strip-types": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-preset-flow/src/index.js b/packages/babel-preset-flow/src/index.js
index 844f46a817e99..7dc163bdbfd96 100644
--- a/packages/babel-preset-flow/src/index.js
+++ b/packages/babel-preset-flow/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import transformFlowStripTypes from "@babel/plugin-transform-flow-strip-types";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     plugins: [transformFlowStripTypes],
   };
-}
+});
diff --git a/packages/babel-preset-react/package.json b/packages/babel-preset-react/package.json
index 0b053476216a2..649cbc8f85bfa 100644
--- a/packages/babel-preset-react/package.json
+++ b/packages/babel-preset-react/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-react",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel preset for all React plugins.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,18 +8,19 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-react",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/plugin-syntax-jsx": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-display-name": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-jsx": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-jsx-self": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-jsx-source": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-syntax-jsx": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-display-name": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-jsx": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-jsx-self": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-jsx-source": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39",
-    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42",
+    "@babel/helper-transform-fixture-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-preset-react/src/index.js b/packages/babel-preset-react/src/index.js
index 2891f52ce4103..d13753fdc533e 100644
--- a/packages/babel-preset-react/src/index.js
+++ b/packages/babel-preset-react/src/index.js
@@ -1,10 +1,13 @@
+import { declare } from "@babel/helper-plugin-utils";
 import transformReactJSX from "@babel/plugin-transform-react-jsx";
 import transformSyntaxJSX from "@babel/plugin-syntax-jsx";
 import transformReactDisplayName from "@babel/plugin-transform-react-display-name";
 import transformReactJSXSource from "@babel/plugin-transform-react-jsx-source";
 import transformReactJSXSelf from "@babel/plugin-transform-react-jsx-self";
 
-export default function(api, opts = {}) {
+export default declare((api, opts) => {
+  api.assertVersion(7);
+
   const pragma = opts.pragma || "React.createElement";
   const pragmaFrag = opts.pragmaFrag || "React.Fragment";
   const throwIfNamespace =
@@ -31,4 +34,4 @@ export default function(api, opts = {}) {
       development && transformReactJSXSelf,
     ].filter(Boolean),
   };
-}
+});
diff --git a/packages/babel-preset-react/test/index.js b/packages/babel-preset-react/test/index.js
index 92a7d30391eb8..4d7a12e26cafd 100644
--- a/packages/babel-preset-react/test/index.js
+++ b/packages/babel-preset-react/test/index.js
@@ -2,9 +2,9 @@ import react from "../lib";
 import { expect } from "chai";
 
 describe("react preset", () => {
-  it("doesn't throw with no options passed", () => {
+  it("does throw clear error when no options passed for Babel 6", () => {
     expect(() => {
-      react(null);
-    }).not.to.throw();
+      react({ version: "6.5.0" });
+    }).to.throw(Error, /Requires Babel "\^7.0.0-0"/);
   });
 });
diff --git a/packages/babel-preset-stage-0/package.json b/packages/babel-preset-stage-0/package.json
index 33167b7b4c353..98570a2e95822 100644
--- a/packages/babel-preset-stage-0/package.json
+++ b/packages/babel-preset-stage-0/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-stage-0",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel preset for stage 0 plugins",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,13 +8,15 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-stage-0",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/plugin-proposal-function-bind": "7.0.0-beta.39",
-    "@babel/preset-stage-1": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-proposal-function-bind": "7.0.0-beta.42",
+    "@babel/plugin-proposal-logical-assignment-operators": "7.0.0-beta.42",
+    "@babel/preset-stage-1": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-preset-stage-0/src/index.js b/packages/babel-preset-stage-0/src/index.js
index 2d97b1f23b069..7eadd4cf25dd9 100644
--- a/packages/babel-preset-stage-0/src/index.js
+++ b/packages/babel-preset-stage-0/src/index.js
@@ -1,8 +1,12 @@
+import { declare } from "@babel/helper-plugin-utils";
 import presetStage1 from "@babel/preset-stage-1";
 
 import transformFunctionBind from "@babel/plugin-proposal-function-bind";
+import transformLogicalAssignmentOperators from "@babel/plugin-proposal-logical-assignment-operators";
+
+export default declare((api, opts) => {
+  api.assertVersion(7);
 
-export default function(context, opts = {}) {
   let loose = false;
   let useBuiltIns = false;
 
@@ -22,6 +26,6 @@ export default function(context, opts = {}) {
 
   return {
     presets: [[presetStage1, { loose, useBuiltIns }]],
-    plugins: [transformFunctionBind],
+    plugins: [transformFunctionBind, transformLogicalAssignmentOperators],
   };
-}
+});
diff --git a/packages/babel-preset-stage-1/package.json b/packages/babel-preset-stage-1/package.json
index 184cbc9b5b220..14f788fb3353e 100644
--- a/packages/babel-preset-stage-1/package.json
+++ b/packages/babel-preset-stage-1/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-stage-1",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel preset for stage 1 plugins",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,18 +8,19 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-stage-1",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/plugin-proposal-decorators": "7.0.0-beta.39",
-    "@babel/plugin-proposal-do-expressions": "7.0.0-beta.39",
-    "@babel/plugin-proposal-export-default-from": "7.0.0-beta.39",
-    "@babel/plugin-proposal-nullish-coalescing-operator": "7.0.0-beta.39",
-    "@babel/plugin-proposal-optional-chaining": "7.0.0-beta.39",
-    "@babel/plugin-proposal-pipeline-operator": "7.0.0-beta.39",
-    "@babel/preset-stage-2": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-proposal-decorators": "7.0.0-beta.42",
+    "@babel/plugin-proposal-do-expressions": "7.0.0-beta.42",
+    "@babel/plugin-proposal-export-default-from": "7.0.0-beta.42",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "7.0.0-beta.42",
+    "@babel/plugin-proposal-optional-chaining": "7.0.0-beta.42",
+    "@babel/plugin-proposal-pipeline-operator": "7.0.0-beta.42",
+    "@babel/preset-stage-2": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-preset-stage-1/src/index.js b/packages/babel-preset-stage-1/src/index.js
index 4658ccd94f15f..104f468aff161 100644
--- a/packages/babel-preset-stage-1/src/index.js
+++ b/packages/babel-preset-stage-1/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import presetStage2 from "@babel/preset-stage-2";
 
 import transformDecorators from "@babel/plugin-proposal-decorators";
@@ -7,7 +8,9 @@ import transformPipelineOperator from "@babel/plugin-proposal-pipeline-operator"
 import transformNullishCoalescingOperator from "@babel/plugin-proposal-nullish-coalescing-operator";
 import transformDoExpressions from "@babel/plugin-proposal-do-expressions";
 
-export default function(context, opts = {}) {
+export default declare((api, opts) => {
+  api.assertVersion(7);
+
   let loose = false;
   let useBuiltIns = false;
 
@@ -36,4 +39,4 @@ export default function(context, opts = {}) {
       transformDoExpressions,
     ],
   };
-}
+});
diff --git a/packages/babel-preset-stage-2/package.json b/packages/babel-preset-stage-2/package.json
index 15856cd1bec07..998f000f255e0 100644
--- a/packages/babel-preset-stage-2/package.json
+++ b/packages/babel-preset-stage-2/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-stage-2",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel preset for stage 2 plugins",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,16 +8,17 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-stage-2",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/plugin-proposal-export-namespace-from": "7.0.0-beta.39",
-    "@babel/plugin-proposal-function-sent": "7.0.0-beta.39",
-    "@babel/plugin-proposal-numeric-separator": "7.0.0-beta.39",
-    "@babel/plugin-proposal-throw-expressions": "7.0.0-beta.39",
-    "@babel/preset-stage-3": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-proposal-export-namespace-from": "7.0.0-beta.42",
+    "@babel/plugin-proposal-function-sent": "7.0.0-beta.42",
+    "@babel/plugin-proposal-numeric-separator": "7.0.0-beta.42",
+    "@babel/plugin-proposal-throw-expressions": "7.0.0-beta.42",
+    "@babel/preset-stage-3": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-preset-stage-2/src/index.js b/packages/babel-preset-stage-2/src/index.js
index 556023e04f377..22c1fd81bd0c5 100644
--- a/packages/babel-preset-stage-2/src/index.js
+++ b/packages/babel-preset-stage-2/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import presetStage3 from "@babel/preset-stage-3";
 
 import transformFunctionSent from "@babel/plugin-proposal-function-sent";
@@ -5,7 +6,9 @@ import transformExportNamespaceFrom from "@babel/plugin-proposal-export-namespac
 import transformNumericSeparator from "@babel/plugin-proposal-numeric-separator";
 import transformThrowExpressions from "@babel/plugin-proposal-throw-expressions";
 
-export default function(context, opts = {}) {
+export default declare((api, opts) => {
+  api.assertVersion(7);
+
   let loose = false;
   let useBuiltIns = false;
 
@@ -32,4 +35,4 @@ export default function(context, opts = {}) {
       transformThrowExpressions,
     ],
   };
-}
+});
diff --git a/packages/babel-preset-stage-3/package.json b/packages/babel-preset-stage-3/package.json
index c06ce2d0f0c2f..bf7dd40312b37 100644
--- a/packages/babel-preset-stage-3/package.json
+++ b/packages/babel-preset-stage-3/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-stage-3",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel preset for stage 3 plugins",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,18 +8,19 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-stage-3",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/plugin-proposal-async-generator-functions": "7.0.0-beta.39",
-    "@babel/plugin-proposal-class-properties": "7.0.0-beta.39",
-    "@babel/plugin-proposal-object-rest-spread": "7.0.0-beta.39",
-    "@babel/plugin-proposal-optional-catch-binding": "7.0.0-beta.39",
-    "@babel/plugin-proposal-unicode-property-regex": "7.0.0-beta.39",
-    "@babel/plugin-syntax-dynamic-import": "7.0.0-beta.39",
-    "@babel/plugin-syntax-import-meta": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-proposal-async-generator-functions": "7.0.0-beta.42",
+    "@babel/plugin-proposal-class-properties": "7.0.0-beta.42",
+    "@babel/plugin-proposal-object-rest-spread": "7.0.0-beta.42",
+    "@babel/plugin-proposal-optional-catch-binding": "7.0.0-beta.42",
+    "@babel/plugin-proposal-unicode-property-regex": "7.0.0-beta.42",
+    "@babel/plugin-syntax-dynamic-import": "7.0.0-beta.42",
+    "@babel/plugin-syntax-import-meta": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-preset-stage-3/src/index.js b/packages/babel-preset-stage-3/src/index.js
index afe2ff4e3c50b..6bec72fb8d73e 100644
--- a/packages/babel-preset-stage-3/src/index.js
+++ b/packages/babel-preset-stage-3/src/index.js
@@ -1,3 +1,4 @@
+import { declare } from "@babel/helper-plugin-utils";
 import syntaxDynamicImport from "@babel/plugin-syntax-dynamic-import";
 import syntaxImportMeta from "@babel/plugin-syntax-import-meta";
 import transformAsyncGeneratorFunctions from "@babel/plugin-proposal-async-generator-functions";
@@ -6,7 +7,9 @@ import transformObjectRestSpread from "@babel/plugin-proposal-object-rest-spread
 import transformOptionalCatchBinding from "@babel/plugin-proposal-optional-catch-binding";
 import transformUnicodePropertyRegex from "@babel/plugin-proposal-unicode-property-regex";
 
-export default function(context, opts = {}) {
+export default declare((api, opts) => {
+  api.assertVersion(7);
+
   let loose = false;
   let useBuiltIns = false;
 
@@ -35,4 +38,4 @@ export default function(context, opts = {}) {
       transformUnicodePropertyRegex,
     ],
   };
-}
+});
diff --git a/packages/babel-preset-typescript/package.json b/packages/babel-preset-typescript/package.json
index 8dda11b98c3e1..67cb1b6d5fede 100644
--- a/packages/babel-preset-typescript/package.json
+++ b/packages/babel-preset-typescript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/preset-typescript",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel preset for TypeScript.",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-typescript",
   "license": "MIT",
@@ -10,12 +10,13 @@
     "typescript"
   ],
   "dependencies": {
-    "@babel/plugin-transform-typescript": "7.0.0-beta.39"
+    "@babel/helper-plugin-utils": "7.0.0-beta.42",
+    "@babel/plugin-transform-typescript": "7.0.0-beta.42"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-preset-typescript/src/index.js b/packages/babel-preset-typescript/src/index.js
index 9348fa06227f3..0d5f60c0e418a 100644
--- a/packages/babel-preset-typescript/src/index.js
+++ b/packages/babel-preset-typescript/src/index.js
@@ -1,7 +1,10 @@
+import { declare } from "@babel/helper-plugin-utils";
 import transformTypeScript from "@babel/plugin-transform-typescript";
 
-export default function() {
+export default declare(api => {
+  api.assertVersion(7);
+
   return {
     plugins: [transformTypeScript],
   };
-}
+});
diff --git a/packages/babel-register/package.json b/packages/babel-register/package.json
index f8960eb54d7d7..527bf6ebed132 100644
--- a/packages/babel-register/package.json
+++ b/packages/babel-register/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/register",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "babel require hook",
   "license": "MIT",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-register",
@@ -19,10 +19,10 @@
     "source-map-support": "^0.4.2"
   },
   "peerDependencies": {
-    "@babel/core": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
+    "@babel/core": "7.0.0-beta.42",
     "default-require-extensions": "^2.0.0"
   }
 }
diff --git a/packages/babel-register/src/node.js b/packages/babel-register/src/node.js
index a20514f2a1f10..9dbdf5d659868 100644
--- a/packages/babel-register/src/node.js
+++ b/packages/babel-register/src/node.js
@@ -9,7 +9,7 @@ import fs from "fs";
 import path from "path";
 
 const maps = {};
-const transformOpts = {};
+let transformOpts = {};
 let piratesRevert = null;
 
 function installSourceMapSupport() {
@@ -113,18 +113,24 @@ export default function register(opts?: Object = {}) {
   delete opts.extensions;
   delete opts.cache;
 
-  Object.assign(transformOpts, opts);
+  transformOpts = Object.assign({}, opts);
 
-  if (!transformOpts.ignore && !transformOpts.only) {
+  let { cwd = "." } = transformOpts;
+
+  // Ensure that the working directory is resolved up front so that
+  // things don't break if it changes later.
+  cwd = transformOpts.cwd = path.resolve(cwd);
+
+  if (transformOpts.ignore === undefined && transformOpts.only === undefined) {
     transformOpts.only = [
       // Only compile things inside the current working directory.
-      new RegExp("^" + escapeRegExp(process.cwd()), "i"),
+      new RegExp("^" + escapeRegExp(cwd), "i"),
     ];
     transformOpts.ignore = [
       // Ignore any node_modules inside the current working directory.
       new RegExp(
         "^" +
-          escapeRegExp(process.cwd()) +
+          escapeRegExp(cwd) +
           "(?:" +
           path.sep +
           ".*)?" +
diff --git a/packages/babel-register/test/__data__/.babelrc b/packages/babel-register/test/__data__/.babelrc
new file mode 100644
index 0000000000000..b3eb3ec8efed6
--- /dev/null
+++ b/packages/babel-register/test/__data__/.babelrc
@@ -0,0 +1,5 @@
+{
+    "plugins": [
+        "@babel/transform-modules-commonjs"
+    ]
+}
\ No newline at end of file
diff --git a/packages/babel-register/test/__data__/gen_error.js b/packages/babel-register/test/__data__/gen_error.js
deleted file mode 100644
index 4a0676556e1d8..0000000000000
--- a/packages/babel-register/test/__data__/gen_error.js
+++ /dev/null
@@ -1,4 +0,0 @@
-/* eslint-disable */
-module.exports = () => { 'use strict'; let error; try { const impossible_result = ''.toFixed(); } catch (e) { error = e; } return error.stack.toString().replace('\n', ''); }
-
-
diff --git a/packages/babel-register/test/cache.js b/packages/babel-register/test/cache.js
index 6c150758b998a..c9704cbdd3ab9 100644
--- a/packages/babel-register/test/cache.js
+++ b/packages/babel-register/test/cache.js
@@ -1,4 +1,3 @@
-import { expect } from "chai";
 import fs from "fs";
 import path from "path";
 
@@ -35,7 +34,7 @@ describe("@babel/register - caching", () => {
 
     beforeEach(() => {
       // Since lib/cache is a singleton we need to fully reload it
-      delete require.cache[require.resolve("../lib/cache")];
+      jest.resetModules();
       const cache = require("../lib/cache");
 
       load = cache.load;
@@ -44,22 +43,20 @@ describe("@babel/register - caching", () => {
     });
 
     afterEach(cleanCache);
-    after(resetCache);
+    afterAll(resetCache);
 
     it("should load and get cached data", () => {
       writeCache({ foo: "bar" });
 
       load();
 
-      expect(get()).to.be.an("object");
-      expect(get()).to.deep.equal({ foo: "bar" });
+      expect(get()).toEqual({ foo: "bar" });
     });
 
     it("should load and get an object with no cached data", () => {
       load();
 
-      expect(get()).to.be.an("object");
-      expect(get()).to.deep.equal({});
+      expect(get()).toEqual({});
     });
 
     it("should load and get an object with invalid cached data", () => {
@@ -67,15 +64,14 @@ describe("@babel/register - caching", () => {
 
       load();
 
-      expect(get()).to.be.an("object");
-      expect(get()).to.deep.equal({});
+      expect(get()).toEqual({});
     });
 
     it("should create the cache on save", () => {
       save();
 
-      expect(fs.existsSync(testCacheFilename)).to.be.true;
-      expect(get()).to.deep.equal({});
+      expect(fs.existsSync(testCacheFilename)).toBe(true);
+      expect(get()).toEqual({});
     });
   });
 });
diff --git a/packages/babel-register/test/index.js b/packages/babel-register/test/index.js
index a41f299e193f1..67eef99204881 100644
--- a/packages/babel-register/test/index.js
+++ b/packages/babel-register/test/index.js
@@ -1,32 +1,46 @@
-import sourceMapSupport from "source-map-support";
-import chai from "chai";
+import fs from "fs";
+
+let currentHook;
+let currentOptions;
+let sourceMapSupport = false;
+
+const registerFile = require.resolve("../lib/node");
+const testFile = require.resolve("./__data__/es2015");
+const testFileContent = fs.readFileSync(testFile);
+
+jest.mock("pirates", () => {
+  return {
+    addHook(hook, opts) {
+      currentHook = hook;
+      currentOptions = opts;
+
+      return () => {
+        currentHook = null;
+        currentOptions = null;
+      };
+    },
+  };
+});
+
+jest.mock("source-map-support", () => {
+  return {
+    install() {
+      sourceMapSupport = true;
+    },
+  };
+});
 
-const DATA_ES2015 = require.resolve("./__data__/es2015");
-const GEN_ERROR = require.resolve("./__data__/gen_error");
+const defaultOptions = {
+  exts: [".js", ".jsx", ".es6", ".es", ".mjs"],
+  ignoreNodeModules: false,
+};
 
 describe("@babel/register", function() {
   let babelRegister;
-  let oldCompiler;
-
-  function setupRegister(config = {}) {
-    babelRegister = require("../lib/node");
-    babelRegister.default(
-      Object.assign(
-        {
-          plugins: [
-            {
-              visitor: {
-                ImportDeclaration(path) {
-                  path.remove();
-                },
-              },
-            },
-          ],
-          babelrc: false,
-        },
-        config,
-      ),
-    );
+
+  function setupRegister(config = { babelrc: false }) {
+    babelRegister = require(registerFile);
+    babelRegister.default(config);
   }
 
   function revertRegister() {
@@ -36,71 +50,79 @@ describe("@babel/register", function() {
     }
   }
 
-  before(() => {
-    const js = require("default-require-extensions/js");
-    oldCompiler = require.extensions[".js"];
-    require.extensions[".js"] = js;
-    sourceMapSupport.install({
-      emptyCacheBetweenOperations: true,
-    });
+  afterEach(() => {
+    revertRegister();
+    currentHook = null;
+    currentOptions = null;
+    sourceMapSupport = false;
+    jest.resetModules();
   });
 
-  after(() => {
-    require.extensions[".js"] = oldCompiler;
-  });
+  test("registers hook correctly", () => {
+    setupRegister();
 
-  afterEach(() => {
-    revertRegister();
-    delete require.cache[DATA_ES2015];
-    delete require.cache[GEN_ERROR];
+    expect(typeof currentHook).toBe("function");
+    expect(currentOptions).toEqual(defaultOptions);
   });
 
-  it("registers correctly", () => {
+  test("unregisters hook correctly", () => {
     setupRegister();
+    revertRegister();
 
-    chai.expect(require(DATA_ES2015)).to.be.ok;
+    expect(currentHook).toBeNull();
+    expect(currentOptions).toBeNull();
   });
 
-  it("reverts correctly", () => {
+  test("installs source map support by default", () => {
     setupRegister();
 
-    chai.expect(require(DATA_ES2015)).to.be.ok;
-    delete require.cache[DATA_ES2015];
+    currentHook("const a = 1;", testFile);
 
-    revertRegister();
+    expect(sourceMapSupport).toBe(true);
+  });
+
+  test("installs source map support when requested", () => {
+    setupRegister({
+      babelrc: false,
+      sourceMaps: true,
+    });
 
-    chai
-      .expect(() => {
-        require(DATA_ES2015);
-      })
-      .to.throw(SyntaxError);
+    currentHook("const a = 1;", testFile);
+
+    expect(sourceMapSupport).toBe(true);
   });
 
-  it("does not install source map support if asked not to", () => {
+  test("does not install source map support if asked not to", () => {
     setupRegister({
+      babelrc: false,
       sourceMaps: false,
     });
 
-    let gen_error;
-    chai.expect((gen_error = require(GEN_ERROR))).to.be.ok;
-    chai.expect(gen_error()).to.match(/gen_error\.js:8:34/);
+    currentHook("const a = 1;", testFile);
+
+    expect(sourceMapSupport).toBe(false);
   });
 
-  it("installs source map support by default", () => {
-    setupRegister();
+  test("hook transpiles with config", () => {
+    setupRegister({
+      babelrc: false,
+      sourceMaps: false,
+      plugins: ["@babel/transform-modules-commonjs"],
+    });
 
-    let gen_error;
-    chai.expect((gen_error = require(GEN_ERROR))).to.be.ok;
-    chai.expect(gen_error()).to.match(/gen_error\.js:2:86/);
+    const result = currentHook(testFileContent, testFile);
+
+    expect(result).toBe('"use strict";\n\nrequire("assert");');
   });
 
-  it("installs source map support when requested", () => {
+  test("hook transpiles with babelrc", () => {
     setupRegister({
-      sourceMaps: "both",
+      babelrc: true,
+      sourceMaps: false,
     });
 
-    let gen_error;
-    chai.expect((gen_error = require(GEN_ERROR))).to.be.ok;
-    chai.expect(gen_error()).to.match(/gen_error\.js:2:86/);
+    const result = currentHook(testFileContent, testFile);
+
+    expect(result).toBe('"use strict";\n\nrequire("assert");');
   });
 });
diff --git a/packages/babel-runtime/helpers/builtin/es6/iterableToArray.js b/packages/babel-runtime/helpers/builtin/es6/iterableToArray.js
new file mode 100644
index 0000000000000..671e400d91668
--- /dev/null
+++ b/packages/babel-runtime/helpers/builtin/es6/iterableToArray.js
@@ -0,0 +1,3 @@
+export default function _iterableToArray(iter) {
+  if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter);
+}
\ No newline at end of file
diff --git a/packages/babel-runtime/helpers/builtin/es6/toArray.js b/packages/babel-runtime/helpers/builtin/es6/toArray.js
index 5443502a98695..5acb22b388ad5 100644
--- a/packages/babel-runtime/helpers/builtin/es6/toArray.js
+++ b/packages/babel-runtime/helpers/builtin/es6/toArray.js
@@ -1,3 +1,6 @@
+import arrayWithHoles from "./arrayWithHoles";
+import iterableToArray from "./iterableToArray";
+import nonIterableRest from "./nonIterableRest";
 export default function _toArray(arr) {
-  return Array.isArray(arr) ? arr : Array.from(arr);
+  return arrayWithHoles(arr) || iterableToArray(arr) || nonIterableRest();
 }
\ No newline at end of file
diff --git a/packages/babel-runtime/helpers/builtin/iterableToArray.js b/packages/babel-runtime/helpers/builtin/iterableToArray.js
new file mode 100644
index 0000000000000..e917e57937bff
--- /dev/null
+++ b/packages/babel-runtime/helpers/builtin/iterableToArray.js
@@ -0,0 +1,5 @@
+function _iterableToArray(iter) {
+  if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter);
+}
+
+module.exports = _iterableToArray;
\ No newline at end of file
diff --git a/packages/babel-runtime/helpers/builtin/toArray.js b/packages/babel-runtime/helpers/builtin/toArray.js
index 97107ebfeb313..c28fd9e46ef93 100644
--- a/packages/babel-runtime/helpers/builtin/toArray.js
+++ b/packages/babel-runtime/helpers/builtin/toArray.js
@@ -1,5 +1,11 @@
+var arrayWithHoles = require("./arrayWithHoles");
+
+var iterableToArray = require("./iterableToArray");
+
+var nonIterableRest = require("./nonIterableRest");
+
 function _toArray(arr) {
-  return Array.isArray(arr) ? arr : Array.from(arr);
+  return arrayWithHoles(arr) || iterableToArray(arr) || nonIterableRest();
 }
 
 module.exports = _toArray;
\ No newline at end of file
diff --git a/packages/babel-runtime/helpers/es6/iterableToArray.js b/packages/babel-runtime/helpers/es6/iterableToArray.js
new file mode 100644
index 0000000000000..9f20ecdbd9560
--- /dev/null
+++ b/packages/babel-runtime/helpers/es6/iterableToArray.js
@@ -0,0 +1,5 @@
+import _Array$from from "../../core-js/array/from";
+import _isIterable from "../../core-js/is-iterable";
+export default function _iterableToArray(iter) {
+  if (_isIterable(Object(iter)) || Object.prototype.toString.call(iter) === "[object Arguments]") return _Array$from(iter);
+}
\ No newline at end of file
diff --git a/packages/babel-runtime/helpers/es6/toArray.js b/packages/babel-runtime/helpers/es6/toArray.js
index e14a0feb30d9b..5acb22b388ad5 100644
--- a/packages/babel-runtime/helpers/es6/toArray.js
+++ b/packages/babel-runtime/helpers/es6/toArray.js
@@ -1,4 +1,6 @@
-import _Array$from from "../../core-js/array/from";
+import arrayWithHoles from "./arrayWithHoles";
+import iterableToArray from "./iterableToArray";
+import nonIterableRest from "./nonIterableRest";
 export default function _toArray(arr) {
-  return Array.isArray(arr) ? arr : _Array$from(arr);
+  return arrayWithHoles(arr) || iterableToArray(arr) || nonIterableRest();
 }
\ No newline at end of file
diff --git a/packages/babel-runtime/helpers/iterableToArray.js b/packages/babel-runtime/helpers/iterableToArray.js
new file mode 100644
index 0000000000000..c7834a312257a
--- /dev/null
+++ b/packages/babel-runtime/helpers/iterableToArray.js
@@ -0,0 +1,9 @@
+var _Array$from = require("../core-js/array/from");
+
+var _isIterable = require("../core-js/is-iterable");
+
+function _iterableToArray(iter) {
+  if (_isIterable(Object(iter)) || Object.prototype.toString.call(iter) === "[object Arguments]") return _Array$from(iter);
+}
+
+module.exports = _iterableToArray;
\ No newline at end of file
diff --git a/packages/babel-runtime/helpers/toArray.js b/packages/babel-runtime/helpers/toArray.js
index 6709feb464ed3..c28fd9e46ef93 100644
--- a/packages/babel-runtime/helpers/toArray.js
+++ b/packages/babel-runtime/helpers/toArray.js
@@ -1,7 +1,11 @@
-var _Array$from = require("../core-js/array/from");
+var arrayWithHoles = require("./arrayWithHoles");
+
+var iterableToArray = require("./iterableToArray");
+
+var nonIterableRest = require("./nonIterableRest");
 
 function _toArray(arr) {
-  return Array.isArray(arr) ? arr : _Array$from(arr);
+  return arrayWithHoles(arr) || iterableToArray(arr) || nonIterableRest();
 }
 
 module.exports = _toArray;
\ No newline at end of file
diff --git a/packages/babel-runtime/package.json b/packages/babel-runtime/package.json
index ea2170b825eb3..97a081a2f9d23 100644
--- a/packages/babel-runtime/package.json
+++ b/packages/babel-runtime/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/runtime",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "babel selfContained runtime",
   "license": "MIT",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-runtime",
@@ -10,10 +10,10 @@
     "regenerator-runtime": "^0.11.1"
   },
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/helpers": "7.0.0-beta.39",
-    "@babel/plugin-transform-runtime": "7.0.0-beta.39",
-    "@babel/preset-env": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/helpers": "7.0.0-beta.42",
+    "@babel/plugin-transform-runtime": "7.0.0-beta.42",
+    "@babel/preset-env": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-standalone/README.md b/packages/babel-standalone/README.md
index 3b00488a411fa..16a6851e6dd84 100644
--- a/packages/babel-standalone/README.md
+++ b/packages/babel-standalone/README.md
@@ -19,7 +19,6 @@ Installation
 There are several ways to get a copy of @babel/standalone. Pick whichever one you like:
 
 - Use it via UNPKG: https://unpkg.com/@babel/standalone/babel.min.js. This is a simple way to embed it on a webpage without having to do any other setup.
-- Install via Bower: `bower install @babel/standalone`
 - Install via NPM: `npm install --save @babel/standalone`
 - Manually grab `babel.js` and/or `babel.min.js` from the [GitHub releases page](https://github.com/Daniel15/babel-standalone/releases). Every release includes these files.
 - Install it via Git: You can use the repo at https://github.com/Daniel15/babel-standalone-bower to pull a prebuilt version from Git. Note that this is generally only advised for systems that *must* pull artifacts from Git, such as Bower.
diff --git a/packages/babel-standalone/package.json b/packages/babel-standalone/package.json
index 39d22f96f5292..315e4162e239d 100644
--- a/packages/babel-standalone/package.json
+++ b/packages/babel-standalone/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/standalone",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Standalone build of Babel for use in non-Node.js environments.",
   "main": "babel.js",
   "files": [
@@ -9,92 +9,92 @@
     "src"
   ],
   "devDependencies": {
-    "@babel/core": "7.0.0-beta.39",
-    "@babel/plugin-external-helpers": "7.0.0-beta.39",
-    "@babel/plugin-proposal-async-generator-functions": "7.0.0-beta.39",
-    "@babel/plugin-proposal-class-properties": "7.0.0-beta.39",
-    "@babel/plugin-proposal-decorators": "7.0.0-beta.39",
-    "@babel/plugin-proposal-do-expressions": "7.0.0-beta.39",
-    "@babel/plugin-proposal-export-default-from": "7.0.0-beta.39",
-    "@babel/plugin-proposal-export-namespace-from": "7.0.0-beta.39",
-    "@babel/plugin-proposal-function-bind": "7.0.0-beta.39",
-    "@babel/plugin-proposal-object-rest-spread": "7.0.0-beta.39",
-    "@babel/plugin-proposal-optional-catch-binding": "7.0.0-beta.39",
-    "@babel/plugin-proposal-pipeline-operator": "7.0.0-beta.39",
-    "@babel/plugin-proposal-unicode-property-regex": "7.0.0-beta.39",
-    "@babel/plugin-syntax-async-generators": "7.0.0-beta.39",
-    "@babel/plugin-syntax-class-properties": "7.0.0-beta.39",
-    "@babel/plugin-syntax-decorators": "7.0.0-beta.39",
-    "@babel/plugin-syntax-do-expressions": "7.0.0-beta.39",
-    "@babel/plugin-syntax-dynamic-import": "7.0.0-beta.39",
-    "@babel/plugin-syntax-export-default-from": "7.0.0-beta.39",
-    "@babel/plugin-syntax-export-namespace-from": "7.0.0-beta.39",
-    "@babel/plugin-syntax-flow": "7.0.0-beta.39",
-    "@babel/plugin-syntax-function-bind": "7.0.0-beta.39",
-    "@babel/plugin-syntax-function-sent": "7.0.0-beta.39",
-    "@babel/plugin-syntax-import-meta": "7.0.0-beta.39",
-    "@babel/plugin-syntax-jsx": "7.0.0-beta.39",
-    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.39",
-    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.39",
-    "@babel/plugin-syntax-pipeline-operator": "7.0.0-beta.39",
-    "@babel/plugin-syntax-typescript": "7.0.0-beta.39",
-    "@babel/plugin-transform-arrow-functions": "7.0.0-beta.39",
-    "@babel/plugin-transform-async-to-generator": "7.0.0-beta.39",
-    "@babel/plugin-transform-block-scoped-functions": "7.0.0-beta.39",
-    "@babel/plugin-transform-block-scoping": "7.0.0-beta.39",
-    "@babel/plugin-transform-classes": "7.0.0-beta.39",
-    "@babel/plugin-transform-computed-properties": "7.0.0-beta.39",
-    "@babel/plugin-transform-destructuring": "7.0.0-beta.39",
-    "@babel/plugin-transform-dotall-regex": "7.0.0-beta.39",
-    "@babel/plugin-transform-duplicate-keys": "7.0.0-beta.39",
-    "@babel/plugin-transform-exponentiation-operator": "7.0.0-beta.39",
-    "@babel/plugin-transform-flow-comments": "7.0.0-beta.39",
-    "@babel/plugin-transform-flow-strip-types": "7.0.0-beta.39",
-    "@babel/plugin-transform-for-of": "7.0.0-beta.39",
-    "@babel/plugin-transform-function-name": "7.0.0-beta.39",
-    "@babel/plugin-transform-instanceof": "7.0.0-beta.39",
-    "@babel/plugin-transform-jscript": "7.0.0-beta.39",
-    "@babel/plugin-transform-literals": "7.0.0-beta.39",
-    "@babel/plugin-transform-member-expression-literals": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-amd": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-commonjs": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-systemjs": "7.0.0-beta.39",
-    "@babel/plugin-transform-modules-umd": "7.0.0-beta.39",
-    "@babel/plugin-transform-new-target": "7.0.0-beta.39",
-    "@babel/plugin-transform-object-assign": "7.0.0-beta.39",
-    "@babel/plugin-transform-object-set-prototype-of-to-assign": "7.0.0-beta.39",
-    "@babel/plugin-transform-object-super": "7.0.0-beta.39",
-    "@babel/plugin-transform-parameters": "7.0.0-beta.39",
-    "@babel/plugin-transform-property-literals": "7.0.0-beta.39",
-    "@babel/plugin-transform-property-mutators": "7.0.0-beta.39",
-    "@babel/plugin-transform-proto-to-assign": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-constant-elements": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-display-name": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-inline-elements": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-jsx": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-jsx-compat": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-jsx-self": "7.0.0-beta.39",
-    "@babel/plugin-transform-react-jsx-source": "7.0.0-beta.39",
-    "@babel/plugin-transform-regenerator": "7.0.0-beta.39",
-    "@babel/plugin-transform-runtime": "7.0.0-beta.39",
-    "@babel/plugin-transform-shorthand-properties": "7.0.0-beta.39",
-    "@babel/plugin-transform-spread": "7.0.0-beta.39",
-    "@babel/plugin-transform-sticky-regex": "7.0.0-beta.39",
-    "@babel/plugin-transform-strict-mode": "7.0.0-beta.39",
-    "@babel/plugin-transform-template-literals": "7.0.0-beta.39",
-    "@babel/plugin-transform-typeof-symbol": "7.0.0-beta.39",
-    "@babel/plugin-transform-typescript": "7.0.0-beta.39",
-    "@babel/plugin-transform-unicode-regex": "7.0.0-beta.39",
-    "@babel/preset-es2015": "7.0.0-beta.39",
-    "@babel/preset-es2016": "7.0.0-beta.39",
-    "@babel/preset-es2017": "7.0.0-beta.39",
-    "@babel/preset-flow": "7.0.0-beta.39",
-    "@babel/preset-react": "7.0.0-beta.39",
-    "@babel/preset-stage-0": "7.0.0-beta.39",
-    "@babel/preset-stage-1": "7.0.0-beta.39",
-    "@babel/preset-stage-2": "7.0.0-beta.39",
-    "@babel/preset-stage-3": "7.0.0-beta.39",
-    "@babel/preset-typescript": "7.0.0-beta.39"
+    "@babel/core": "7.0.0-beta.42",
+    "@babel/plugin-external-helpers": "7.0.0-beta.42",
+    "@babel/plugin-proposal-async-generator-functions": "7.0.0-beta.42",
+    "@babel/plugin-proposal-class-properties": "7.0.0-beta.42",
+    "@babel/plugin-proposal-decorators": "7.0.0-beta.42",
+    "@babel/plugin-proposal-do-expressions": "7.0.0-beta.42",
+    "@babel/plugin-proposal-export-default-from": "7.0.0-beta.42",
+    "@babel/plugin-proposal-export-namespace-from": "7.0.0-beta.42",
+    "@babel/plugin-proposal-function-bind": "7.0.0-beta.42",
+    "@babel/plugin-proposal-object-rest-spread": "7.0.0-beta.42",
+    "@babel/plugin-proposal-optional-catch-binding": "7.0.0-beta.42",
+    "@babel/plugin-proposal-pipeline-operator": "7.0.0-beta.42",
+    "@babel/plugin-proposal-unicode-property-regex": "7.0.0-beta.42",
+    "@babel/plugin-syntax-async-generators": "7.0.0-beta.42",
+    "@babel/plugin-syntax-class-properties": "7.0.0-beta.42",
+    "@babel/plugin-syntax-decorators": "7.0.0-beta.42",
+    "@babel/plugin-syntax-do-expressions": "7.0.0-beta.42",
+    "@babel/plugin-syntax-dynamic-import": "7.0.0-beta.42",
+    "@babel/plugin-syntax-export-default-from": "7.0.0-beta.42",
+    "@babel/plugin-syntax-export-namespace-from": "7.0.0-beta.42",
+    "@babel/plugin-syntax-flow": "7.0.0-beta.42",
+    "@babel/plugin-syntax-function-bind": "7.0.0-beta.42",
+    "@babel/plugin-syntax-function-sent": "7.0.0-beta.42",
+    "@babel/plugin-syntax-import-meta": "7.0.0-beta.42",
+    "@babel/plugin-syntax-jsx": "7.0.0-beta.42",
+    "@babel/plugin-syntax-object-rest-spread": "7.0.0-beta.42",
+    "@babel/plugin-syntax-optional-catch-binding": "7.0.0-beta.42",
+    "@babel/plugin-syntax-pipeline-operator": "7.0.0-beta.42",
+    "@babel/plugin-syntax-typescript": "7.0.0-beta.42",
+    "@babel/plugin-transform-arrow-functions": "7.0.0-beta.42",
+    "@babel/plugin-transform-async-to-generator": "7.0.0-beta.42",
+    "@babel/plugin-transform-block-scoped-functions": "7.0.0-beta.42",
+    "@babel/plugin-transform-block-scoping": "7.0.0-beta.42",
+    "@babel/plugin-transform-classes": "7.0.0-beta.42",
+    "@babel/plugin-transform-computed-properties": "7.0.0-beta.42",
+    "@babel/plugin-transform-destructuring": "7.0.0-beta.42",
+    "@babel/plugin-transform-dotall-regex": "7.0.0-beta.42",
+    "@babel/plugin-transform-duplicate-keys": "7.0.0-beta.42",
+    "@babel/plugin-transform-exponentiation-operator": "7.0.0-beta.42",
+    "@babel/plugin-transform-flow-comments": "7.0.0-beta.42",
+    "@babel/plugin-transform-flow-strip-types": "7.0.0-beta.42",
+    "@babel/plugin-transform-for-of": "7.0.0-beta.42",
+    "@babel/plugin-transform-function-name": "7.0.0-beta.42",
+    "@babel/plugin-transform-instanceof": "7.0.0-beta.42",
+    "@babel/plugin-transform-jscript": "7.0.0-beta.42",
+    "@babel/plugin-transform-literals": "7.0.0-beta.42",
+    "@babel/plugin-transform-member-expression-literals": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-amd": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-commonjs": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-systemjs": "7.0.0-beta.42",
+    "@babel/plugin-transform-modules-umd": "7.0.0-beta.42",
+    "@babel/plugin-transform-new-target": "7.0.0-beta.42",
+    "@babel/plugin-transform-object-assign": "7.0.0-beta.42",
+    "@babel/plugin-transform-object-set-prototype-of-to-assign": "7.0.0-beta.42",
+    "@babel/plugin-transform-object-super": "7.0.0-beta.42",
+    "@babel/plugin-transform-parameters": "7.0.0-beta.42",
+    "@babel/plugin-transform-property-literals": "7.0.0-beta.42",
+    "@babel/plugin-transform-property-mutators": "7.0.0-beta.42",
+    "@babel/plugin-transform-proto-to-assign": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-constant-elements": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-display-name": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-inline-elements": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-jsx": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-jsx-compat": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-jsx-self": "7.0.0-beta.42",
+    "@babel/plugin-transform-react-jsx-source": "7.0.0-beta.42",
+    "@babel/plugin-transform-regenerator": "7.0.0-beta.42",
+    "@babel/plugin-transform-runtime": "7.0.0-beta.42",
+    "@babel/plugin-transform-shorthand-properties": "7.0.0-beta.42",
+    "@babel/plugin-transform-spread": "7.0.0-beta.42",
+    "@babel/plugin-transform-sticky-regex": "7.0.0-beta.42",
+    "@babel/plugin-transform-strict-mode": "7.0.0-beta.42",
+    "@babel/plugin-transform-template-literals": "7.0.0-beta.42",
+    "@babel/plugin-transform-typeof-symbol": "7.0.0-beta.42",
+    "@babel/plugin-transform-typescript": "7.0.0-beta.42",
+    "@babel/plugin-transform-unicode-regex": "7.0.0-beta.42",
+    "@babel/preset-es2015": "7.0.0-beta.42",
+    "@babel/preset-es2016": "7.0.0-beta.42",
+    "@babel/preset-es2017": "7.0.0-beta.42",
+    "@babel/preset-flow": "7.0.0-beta.42",
+    "@babel/preset-react": "7.0.0-beta.42",
+    "@babel/preset-stage-0": "7.0.0-beta.42",
+    "@babel/preset-stage-1": "7.0.0-beta.42",
+    "@babel/preset-stage-2": "7.0.0-beta.42",
+    "@babel/preset-stage-3": "7.0.0-beta.42",
+    "@babel/preset-typescript": "7.0.0-beta.42"
   },
   "keywords": [
     "babel",
diff --git a/packages/babel-standalone/test/babel.js b/packages/babel-standalone/test/babel.js
index 388adb7f0aef7..c9fad9860612a 100644
--- a/packages/babel-standalone/test/babel.js
+++ b/packages/babel-standalone/test/babel.js
@@ -1,151 +1,158 @@
 const assert = require("assert");
-const Babel = require("../babel");
 
 // Basic smoke tests for @babel/standalone
-describe("@babel/standalone", () => {
-  it("handles the es2015-no-commonjs preset", () => {
-    const output = Babel.transform('const getMessage = () => "Hello World"', {
-      presets: ["es2015-no-commonjs"],
-    }).code;
-    assert.equal(
-      output,
-      "var getMessage = function getMessage() {\n" +
-        '  return "Hello World";\n' +
-        "};",
-    );
-  });
-  it("handles the es2015-loose preset", () => {
-    const output = Babel.transform("class A {}", {
-      presets: ["es2015-loose"],
-    }).code;
-    assert.equal(output, "var A = function A() {};");
-  });
-  it("handles the typescript preset", () => {
-    const output = Babel.transform("var a: string;", {
-      presets: ["typescript"],
-    }).code;
-    assert.equal(output, "var a;");
-  });
-  it("handles the flow preset", () => {
-    const output = Babel.transform("var a: string;", {
-      presets: ["flow"],
-    }).code;
-    assert.equal(output, "var a;");
-  });
-  it("can translate simple ast", () => {
-    const ast = {
-      type: "Program",
-      start: 0,
-      end: 2,
-      directives: [],
-      body: [
-        {
-          type: "ExpressionStatement",
-          start: 0,
-          end: 1,
-          expression: {
-            type: "NumericLiteral",
+(process.env.TEST_TYPE === "cov" ? describe.skip : describe)(
+  "@babel/standalone",
+  () => {
+    const Babel = require("../babel");
+
+    it("handles the es2015-no-commonjs preset", () => {
+      const output = Babel.transform('const getMessage = () => "Hello World"', {
+        presets: ["es2015-no-commonjs"],
+      }).code;
+      assert.equal(
+        output,
+        "var getMessage = function getMessage() {\n" +
+          '  return "Hello World";\n' +
+          "};",
+      );
+    });
+    it("handles the es2015-loose preset", () => {
+      const output = Babel.transform("class A {}", {
+        sourceType: "script",
+        presets: ["es2015-loose"],
+      }).code;
+      assert.equal(output, "var A = function A() {};");
+    });
+    it("handles the typescript preset", () => {
+      const output = Babel.transform("var a: string;", {
+        presets: ["typescript"],
+      }).code;
+      assert.equal(output, "var a;");
+    });
+    it("handles the flow preset", () => {
+      const output = Babel.transform("var a: string;", {
+        presets: ["flow"],
+      }).code;
+      assert.equal(output, "var a;");
+    });
+    it("can translate simple ast", () => {
+      const ast = {
+        type: "Program",
+        start: 0,
+        end: 2,
+        directives: [],
+        body: [
+          {
+            type: "ExpressionStatement",
             start: 0,
-            end: 2,
-            value: 42,
-            raw: "42",
+            end: 1,
+            expression: {
+              type: "NumericLiteral",
+              start: 0,
+              end: 2,
+              value: 42,
+              raw: "42",
+            },
           },
-        },
-      ],
-      sourceType: "module",
-    };
-    const output = Babel.transformFromAst(ast, "42", { presets: ["es2015"] })
-      .code;
-    assert.equal(output, "42;");
-  });
+        ],
+        sourceType: "script",
+      };
+      const output = Babel.transformFromAst(ast, "42", { presets: ["es2015"] })
+        .code;
+      assert.equal(output, "42;");
+    });
 
-  it("handles the react preset", () => {
-    const output = Babel.transform(
-      "const someDiv = <div>{getMessage()}</div>",
-      {
-        presets: ["react"],
-      },
-    ).code;
-    assert.equal(
-      output,
-      'const someDiv = React.createElement("div", null, getMessage());',
-    );
-  });
+    it("handles the react preset", () => {
+      const output = Babel.transform(
+        "const someDiv = <div>{getMessage()}</div>",
+        {
+          presets: ["react"],
+        },
+      ).code;
+      assert.equal(
+        output,
+        'const someDiv = React.createElement("div", null, getMessage());',
+      );
+    });
 
-  it("handles presets with options", () => {
-    const output = Babel.transform("export let x", {
-      presets: [["es2015", { modules: false }]],
-    }).code;
-    assert.equal(output, "export var x;");
-  });
+    it("handles presets with options", () => {
+      const output = Babel.transform("export let x", {
+        presets: [["es2015", { modules: false }]],
+      }).code;
+      assert.equal(output, "export var x;");
+    });
 
-  it("handles specifying a plugin by name", () => {
-    const output = Babel.transform('const getMessage = () => "Hello World"', {
-      plugins: ["transform-arrow-functions"],
-    }).code;
-    // Transforms arrow syntax but NOT "const".
-    assert.equal(
-      output,
-      "const getMessage = function () {\n" + '  return "Hello World";\n' + "};",
-    );
-  });
+    it("handles specifying a plugin by name", () => {
+      const output = Babel.transform('const getMessage = () => "Hello World"', {
+        plugins: ["transform-arrow-functions"],
+      }).code;
+      // Transforms arrow syntax but NOT "const".
+      assert.equal(
+        output,
+        "const getMessage = function () {\n" +
+          '  return "Hello World";\n' +
+          "};",
+      );
+    });
 
-  it("handles plugins with options", () => {
-    const output = Babel.transform("`${x}`", {
-      plugins: [["transform-template-literals", { loose: true }]],
-    }).code;
-    assert.equal(output, '"" + x;');
-  });
+    it("handles plugins with options", () => {
+      const output = Babel.transform("`${x}`", {
+        plugins: [["transform-template-literals", { loose: true }]],
+      }).code;
+      assert.equal(output, '"" + x;');
+    });
 
-  it("throws on invalid preset name", () => {
-    assert.throws(
-      () => Babel.transform("var foo", { presets: ["lolfail"] }),
-      /Invalid preset specified in Babel options: "lolfail"/,
-    );
-  });
+    it("throws on invalid preset name", () => {
+      assert.throws(
+        () => Babel.transform("var foo", { presets: ["lolfail"] }),
+        /Invalid preset specified in Babel options: "lolfail"/,
+      );
+    });
 
-  it("throws on invalid plugin name", () => {
-    assert.throws(
-      () => Babel.transform("var foo", { plugins: ["lolfail"] }),
-      /Invalid plugin specified in Babel options: "lolfail"/,
-    );
-  });
+    it("throws on invalid plugin name", () => {
+      assert.throws(
+        () => Babel.transform("var foo", { plugins: ["lolfail"] }),
+        /Invalid plugin specified in Babel options: "lolfail"/,
+      );
+    });
 
-  describe("custom plugins and presets", () => {
-    const lolizer = () => ({
-      visitor: {
-        Identifier(path) {
-          path.node.name = "LOL";
+    describe("custom plugins and presets", () => {
+      const lolizer = () => ({
+        visitor: {
+          Identifier(path) {
+            path.node.name = "LOL";
+          },
         },
-      },
-    });
+      });
 
-    it("allows custom plugins to be registered", () => {
-      Babel.registerPlugin("lolizer", lolizer);
-      const output = Babel.transform(
-        "function helloWorld() { alert(hello); }",
-        { plugins: ["lolizer"] },
-      );
-      assert.equal(
-        output.code,
-        `function LOL() {
+      it("allows custom plugins to be registered", () => {
+        Babel.registerPlugin("lolizer", lolizer);
+        const output = Babel.transform(
+          "function helloWorld() { alert(hello); }",
+          { plugins: ["lolizer"] },
+        );
+        assert.equal(
+          output.code,
+          `function LOL() {
   LOL(LOL);
 }`,
-      );
-    });
+        );
+      });
 
-    it("allows custom presets to be registered", () => {
-      Babel.registerPreset("lulz", { plugins: [lolizer] });
-      const output = Babel.transform(
-        "function helloWorld() { alert(hello); }",
-        { presets: ["lulz"] },
-      );
-      assert.equal(
-        output.code,
-        `function LOL() {
+      it("allows custom presets to be registered", () => {
+        Babel.registerPreset("lulz", { plugins: [lolizer] });
+        const output = Babel.transform(
+          "function helloWorld() { alert(hello); }",
+          { presets: ["lulz"] },
+        );
+        assert.equal(
+          output.code,
+          `function LOL() {
   LOL(LOL);
 }`,
-      );
+        );
+      });
     });
-  });
-});
+  },
+);
diff --git a/packages/babel-template/package.json b/packages/babel-template/package.json
index 8b54813de023c..a33197b417430 100644
--- a/packages/babel-template/package.json
+++ b/packages/babel-template/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/template",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Generate an AST from a string template.",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,9 +8,9 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-template",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/code-frame": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39",
-    "babylon": "7.0.0-beta.39",
+    "@babel/code-frame": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42",
+    "babylon": "7.0.0-beta.42",
     "lodash": "^4.2.0"
   }
 }
diff --git a/packages/babel-template/src/formatters.js b/packages/babel-template/src/formatters.js
index e665e343be661..4feb1d5484e41 100644
--- a/packages/babel-template/src/formatters.js
+++ b/packages/babel-template/src/formatters.js
@@ -12,7 +12,7 @@ function makeStatementFormatter<T>(
   return {
     // We need to prepend a ";" to force statement parsing so that
     // ExpressionStatement strings won't be parsed as directives.
-    // Alonside that, we also prepend a comment so that when a syntax error
+    // Alongside that, we also prepend a comment so that when a syntax error
     // is encountered, the user will be less likely to get confused about
     // where the random semicolon came from.
     code: str => `/* @babel/template */;\n${str}`,
@@ -54,16 +54,17 @@ export const statement: Formatter<BabelNodeStatement> = makeStatementFormatter(
 
 export const expression: Formatter<BabelNodeExpression> = {
   code: str => `(\n${str}\n)`,
-  validate: (ast: BabelNodeFile) => {
-    const { program } = ast;
+  validate: ({ program }) => {
     if (program.body.length > 1) {
       throw new Error("Found multiple statements but wanted one");
     }
+    // $FlowFixMe
     const expression = program.body[0].expression;
     if (expression.start === 0) {
       throw new Error("Parse result included parens.");
     }
   },
+  // $FlowFixMe
   unwrap: ast => ast.program.body[0].expression,
 };
 
diff --git a/packages/babel-traverse/package.json b/packages/babel-traverse/package.json
index 4837c1f4fad42..57db996193137 100644
--- a/packages/babel-traverse/package.json
+++ b/packages/babel-traverse/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/traverse",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "The Babel Traverse module maintains the overall tree state, and is responsible for replacing, removing, and adding nodes",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -8,17 +8,18 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-traverse",
   "main": "lib/index.js",
   "dependencies": {
-    "@babel/code-frame": "7.0.0-beta.39",
-    "@babel/generator": "7.0.0-beta.39",
-    "@babel/helper-function-name": "7.0.0-beta.39",
-    "@babel/types": "7.0.0-beta.39",
-    "babylon": "7.0.0-beta.39",
-    "debug": "^3.0.1",
+    "@babel/code-frame": "7.0.0-beta.42",
+    "@babel/generator": "7.0.0-beta.42",
+    "@babel/helper-function-name": "7.0.0-beta.42",
+    "@babel/helper-split-export-declaration": "7.0.0-beta.42",
+    "@babel/types": "7.0.0-beta.42",
+    "babylon": "7.0.0-beta.42",
+    "debug": "^3.1.0",
     "globals": "^11.1.0",
     "invariant": "^2.2.0",
     "lodash": "^4.2.0"
   },
   "devDependencies": {
-    "@babel/helper-plugin-test-runner": "7.0.0-beta.39"
+    "@babel/helper-plugin-test-runner": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-traverse/src/path/lib/hoister.js b/packages/babel-traverse/src/path/lib/hoister.js
index 0f6fa039596c4..edd27385105d1 100644
--- a/packages/babel-traverse/src/path/lib/hoister.js
+++ b/packages/babel-traverse/src/path/lib/hoister.js
@@ -206,10 +206,11 @@ export default class PathHoister {
 
     // generate declaration and insert it to our point
     let uid = attachTo.scope.generateUidIdentifier("ref");
+
     const declarator = t.variableDeclarator(uid, this.path.node);
 
     const insertFn = this.attachAfter ? "insertAfter" : "insertBefore";
-    attachTo[insertFn]([
+    const [attached] = attachTo[insertFn]([
       attachTo.isVariableDeclarator()
         ? declarator
         : t.variableDeclaration("var", [declarator]),
@@ -223,5 +224,9 @@ export default class PathHoister {
     }
 
     this.path.replaceWith(t.cloneNode(uid));
+
+    return attachTo.isVariableDeclarator()
+      ? attached.get("init")
+      : attached.get("declarations.0.init");
   }
 }
diff --git a/packages/babel-traverse/src/scope/index.js b/packages/babel-traverse/src/scope/index.js
index 8af703fdc09a3..a2055dd05ac90 100644
--- a/packages/babel-traverse/src/scope/index.js
+++ b/packages/babel-traverse/src/scope/index.js
@@ -210,7 +210,7 @@ export default class Scope {
    * Generate a unique identifier and add it to the current scope.
    */
 
-  generateDeclaredUidIdentifier(name: string = "temp") {
+  generateDeclaredUidIdentifier(name?: string) {
     const id = this.generateUidIdentifier(name);
     this.push({ id });
     return t.cloneNode(id);
@@ -220,7 +220,7 @@ export default class Scope {
    * Generate a unique identifier.
    */
 
-  generateUidIdentifier(name: string = "temp") {
+  generateUidIdentifier(name?: string) {
     return t.identifier(this.generateUid(name));
   }
 
@@ -401,7 +401,7 @@ export default class Scope {
     console.log(sep);
   }
 
-  toArray(node: Object, i?: number) {
+  toArray(node: Object, i?: number | boolean) {
     const file = this.hub.file;
 
     if (t.isIdentifier(node)) {
@@ -431,14 +431,20 @@ export default class Scope {
       );
     }
 
-    let helperName = "toArray";
+    let helperName;
     const args = [node];
     if (i === true) {
+      // Used in array-spread to create an array.
       helperName = "toConsumableArray";
     } else if (i) {
       args.push(t.numericLiteral(i));
+
+      // Used in array-rest to create an array from a subset of an iterable.
       helperName = "slicedToArray";
       // TODO if (this.hub.file.isLoose("es6.forOf")) helperName += "-loose";
+    } else {
+      // Used in array-rest to create an array
+      helperName = "toArray";
     }
     return t.callExpression(file.addHelper(helperName), args);
   }
diff --git a/packages/babel-traverse/src/scope/lib/renamer.js b/packages/babel-traverse/src/scope/lib/renamer.js
index c18c20b1a12e8..05b9e807f4c56 100644
--- a/packages/babel-traverse/src/scope/lib/renamer.js
+++ b/packages/babel-traverse/src/scope/lib/renamer.js
@@ -1,4 +1,5 @@
 import Binding from "../binding";
+import splitExportDeclaration from "@babel/helper-split-export-declaration";
 import * as t from "@babel/types";
 
 const renameVisitor = {
@@ -40,48 +41,20 @@ export default class Renamer {
   binding: Binding;
 
   maybeConvertFromExportDeclaration(parentDeclar) {
-    const exportDeclar =
-      parentDeclar.parentPath.isExportDeclaration() && parentDeclar.parentPath;
-    if (!exportDeclar) return;
+    const maybeExportDeclar = parentDeclar.parentPath;
 
-    // build specifiers that point back to this export declaration
-    const isDefault = exportDeclar.isExportDefaultDeclaration();
+    if (!maybeExportDeclar.isExportDeclaration()) {
+      return;
+    }
 
     if (
-      isDefault &&
-      (parentDeclar.isFunctionDeclaration() ||
-        parentDeclar.isClassDeclaration()) &&
-      !parentDeclar.node.id
+      maybeExportDeclar.isExportDefaultDeclaration() &&
+      !maybeExportDeclar.get("declaration").node.id
     ) {
-      // Ensure that default class and function exports have a name so they have a identifier to
-      // reference from the export specifier list.
-      parentDeclar.node.id = parentDeclar.scope.generateUidIdentifier(
-        "default",
-      );
-    }
-
-    const bindingIdentifiers = parentDeclar.getOuterBindingIdentifiers();
-    const specifiers = [];
-
-    for (const name in bindingIdentifiers) {
-      const localName = name === this.oldName ? this.newName : name;
-      const exportedName = isDefault ? "default" : name;
-      specifiers.push(
-        t.exportSpecifier(t.identifier(localName), t.identifier(exportedName)),
-      );
+      return;
     }
 
-    if (specifiers.length) {
-      const aliasDeclar = t.exportNamedDeclaration(null, specifiers);
-
-      // hoist to the top if it's a function
-      if (parentDeclar.isFunctionDeclaration()) {
-        aliasDeclar._blockHoist = 3;
-      }
-
-      exportDeclar.insertAfter(aliasDeclar);
-      exportDeclar.replaceWith(parentDeclar.node);
-    }
+    splitExportDeclaration(maybeExportDeclar);
   }
 
   maybeConvertFromClassFunctionDeclaration(path) {
@@ -129,7 +102,10 @@ export default class Renamer {
     const { scope, path } = binding;
 
     const parentDeclar = path.find(
-      path => path.isDeclaration() || path.isFunctionExpression(),
+      path =>
+        path.isDeclaration() ||
+        path.isFunctionExpression() ||
+        path.isClassExpression(),
     );
     if (parentDeclar) {
       this.maybeConvertFromExportDeclaration(parentDeclar);
diff --git a/packages/babel-traverse/test/replacement.js b/packages/babel-traverse/test/replacement.js
index 853f90f11715d..cbd40feb997b6 100644
--- a/packages/babel-traverse/test/replacement.js
+++ b/packages/babel-traverse/test/replacement.js
@@ -2,7 +2,6 @@ import traverse from "../lib";
 import assert from "assert";
 import { parse } from "babylon";
 import * as t from "@babel/types";
-import { expect } from "chai";
 
 describe("path/replacement", function() {
   describe("replaceWith", function() {
@@ -37,7 +36,7 @@ describe("path/replacement", function() {
             path.replaceWith(t.identifier("a"));
           },
         });
-      }).to.throw(
+      }).toThrow(
         /You can only replace a Program root node with another Program node/,
       );
     });
@@ -54,7 +53,7 @@ describe("path/replacement", function() {
             ]);
           },
         });
-      }).to.throw(
+      }).toThrow(
         /Don't use `path\.replaceWith\(\)` with an array of nodes, use `path\.replaceWithMultiple\(\)`/,
       );
     });
@@ -69,7 +68,7 @@ describe("path/replacement", function() {
             path.replaceWith("17 + 23");
           },
         });
-      }).to.throw(
+      }).toThrow(
         /Don't use `path\.replaceWith\(\)` with a source string, use `path\.replaceWithSourceString\(\)`/,
       );
     });
@@ -83,7 +82,7 @@ describe("path/replacement", function() {
             path.replaceWith(t.identifier("p"));
           },
         });
-      }).to.throw(/You can't replace this node, we've already removed it/);
+      }).toThrow(/You can't replace this node, we've already removed it/);
     });
 
     it("throws error when passed a falsy value", function() {
@@ -94,7 +93,7 @@ describe("path/replacement", function() {
             path.replaceWith();
           },
         });
-      }).to.throw(
+      }).toThrow(
         /You passed `path\.replaceWith\(\)` a falsy node, use `path\.remove\(\)` instead/,
       );
     });
diff --git a/packages/babel-types/README.md b/packages/babel-types/README.md
index b465146f791c3..a48301c15cc30 100644
--- a/packages/babel-types/README.md
+++ b/packages/babel-types/README.md
@@ -359,6 +359,7 @@ Aliases: `Property`
  - `computed`: `boolean` (default: `false`)
  - `abstract`: `boolean` (default: `null`)
  - `accessibility`: `"public" | "private" | "protected"` (default: `null`)
+ - `definite`: `boolean` (default: `null`)
  - `optional`: `boolean` (default: `null`)
  - `readonly`: `boolean` (default: `null`)
  - `static`: `boolean` (default: `null`)
@@ -1498,7 +1499,7 @@ Aliases: `UserWhitespacable`, `Property`, `ObjectMember`
 
 ### objectTypeAnnotation
 ```javascript
-t.objectTypeAnnotation(properties, indexers, callProperties)
+t.objectTypeAnnotation(properties, indexers, callProperties, exact)
 ```
 
 See also `t.isObjectTypeAnnotation(node, opts)` and `t.assertObjectTypeAnnotation(node, opts)`.
@@ -1508,7 +1509,7 @@ Aliases: `Flow`, `FlowType`
  - `properties`: `Array<ObjectTypeProperty | ObjectTypeSpreadProperty>` (required)
  - `indexers`: `Array<ObjectTypeIndexer>` (default: `null`)
  - `callProperties`: `Array<ObjectTypeCallProperty>` (default: `null`)
- - `exact`: `boolean` (default: `null`)
+ - `exact`: `boolean` (default: `false`)
 
 ---
 
@@ -1875,6 +1876,22 @@ Aliases: `TSTypeElement`
 
 ---
 
+### tSConditionalType
+```javascript
+t.tsConditionalType(checkType, extendsType, trueType, falseType)
+```
+
+See also `t.isTSConditionalType(node, opts)` and `t.assertTSConditionalType(node, opts)`.
+
+Aliases: `TSType`
+
+ - `checkType`: `TSType` (required)
+ - `extendsType`: `TSType` (required)
+ - `trueType`: `TSType` (required)
+ - `falseType`: `TSType` (required)
+
+---
+
 ### tSConstructSignatureDeclaration
 ```javascript
 t.tsConstructSignatureDeclaration(typeParameters, parameters, typeAnnotation)
@@ -2074,6 +2091,19 @@ Aliases: `TSType`
 
 ---
 
+### tSInferType
+```javascript
+t.tsInferType(typeParameter)
+```
+
+See also `t.isTSInferType(node, opts)` and `t.assertTSInferType(node, opts)`.
+
+Aliases: `TSType`
+
+ - `typeParameter`: `TSType` (required)
+
+---
+
 ### tSInterfaceBody
 ```javascript
 t.tsInterfaceBody(body)
@@ -2822,6 +2852,7 @@ See also `t.isVariableDeclarator(node, opts)` and `t.assertVariableDeclarator(no
 
  - `id`: `LVal` (required)
  - `init`: `Expression` (default: `null`)
+ - `definite`: `boolean` (default: `null`)
 
 ---
 
diff --git a/packages/babel-types/package.json b/packages/babel-types/package.json
index 50ee1a5e4205f..89e1f2a35b355 100644
--- a/packages/babel-types/package.json
+++ b/packages/babel-types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@babel/types",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "Babel Types is a Lodash-esque utility library for AST nodes",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -14,7 +14,7 @@
     "to-fast-properties": "^2.0.0"
   },
   "devDependencies": {
-    "@babel/generator": "7.0.0-beta.39",
-    "babylon": "7.0.0-beta.39"
+    "@babel/generator": "7.0.0-beta.42",
+    "babylon": "7.0.0-beta.42"
   }
 }
diff --git a/packages/babel-types/src/asserts/generated/index.js b/packages/babel-types/src/asserts/generated/index.js
index 093d1e7701b05..efae53080e0ec 100644
--- a/packages/babel-types/src/asserts/generated/index.js
+++ b/packages/babel-types/src/asserts/generated/index.js
@@ -801,6 +801,15 @@ export function assertTSIntersectionType(
 ): void {
   assert("TSIntersectionType", node, opts);
 }
+export function assertTSConditionalType(
+  node: Object,
+  opts?: Object = {},
+): void {
+  assert("TSConditionalType", node, opts);
+}
+export function assertTSInferType(node: Object, opts?: Object = {}): void {
+  assert("TSInferType", node, opts);
+}
 export function assertTSParenthesizedType(
   node: Object,
   opts?: Object = {},
diff --git a/packages/babel-types/src/builders/generated/index.js b/packages/babel-types/src/builders/generated/index.js
index ee003c27e8120..1ec3b17766826 100644
--- a/packages/babel-types/src/builders/generated/index.js
+++ b/packages/babel-types/src/builders/generated/index.js
@@ -774,6 +774,16 @@ export function TSIntersectionType(...args: Array<any>): Object {
 }
 export { TSIntersectionType as tsIntersectionType };
 export { TSIntersectionType as tSIntersectionType };
+export function TSConditionalType(...args: Array<any>): Object {
+  return builder("TSConditionalType", ...args);
+}
+export { TSConditionalType as tsConditionalType };
+export { TSConditionalType as tSConditionalType };
+export function TSInferType(...args: Array<any>): Object {
+  return builder("TSInferType", ...args);
+}
+export { TSInferType as tsInferType };
+export { TSInferType as tSInferType };
 export function TSParenthesizedType(...args: Array<any>): Object {
   return builder("TSParenthesizedType", ...args);
 }
diff --git a/packages/babel-types/src/definitions/core.js b/packages/babel-types/src/definitions/core.js
index 6845a78a3f7a7..0bd5c2ae33dd1 100644
--- a/packages/babel-types/src/definitions/core.js
+++ b/packages/babel-types/src/definitions/core.js
@@ -836,6 +836,10 @@ defineType("VariableDeclarator", {
     id: {
       validate: assertNodeType("LVal"),
     },
+    definite: {
+      optional: true,
+      validate: assertValueType("boolean"),
+    },
     init: {
       optional: true,
       validate: assertNodeType("Expression"),
diff --git a/packages/babel-types/src/definitions/experimental.js b/packages/babel-types/src/definitions/experimental.js
index d10d2c47c0fc5..c9d7b1a301b24 100644
--- a/packages/babel-types/src/definitions/experimental.js
+++ b/packages/babel-types/src/definitions/experimental.js
@@ -36,6 +36,10 @@ defineType("ClassProperty", {
       validate: assertNodeType("Expression"),
       optional: true,
     },
+    definite: {
+      validate: assertValueType("boolean"),
+      optional: true,
+    },
     typeAnnotation: {
       validate: assertNodeType("TypeAnnotation", "TSTypeAnnotation", "Noop"),
       optional: true,
diff --git a/packages/babel-types/src/definitions/flow.js b/packages/babel-types/src/definitions/flow.js
index 709d179db72ec..cbd75c77758d0 100644
--- a/packages/babel-types/src/definitions/flow.js
+++ b/packages/babel-types/src/definitions/flow.js
@@ -252,13 +252,17 @@ defineType("NumberTypeAnnotation", {
 defineType("ObjectTypeAnnotation", {
   visitor: ["properties", "indexers", "callProperties"],
   aliases: ["Flow", "FlowType"],
+  builder: ["properties", "indexers", "callProperties", "exact"],
   fields: {
     properties: validate(
       arrayOfType(["ObjectTypeProperty", "ObjectTypeSpreadProperty"]),
     ),
     indexers: validateOptional(arrayOfType("ObjectTypeIndexer")),
     callProperties: validateOptional(arrayOfType("ObjectTypeCallProperty")),
-    exact: validate(assertValueType("boolean")),
+    exact: {
+      validate: assertValueType("boolean"),
+      default: false,
+    },
   },
 });
 
diff --git a/packages/babel-types/src/definitions/typescript.js b/packages/babel-types/src/definitions/typescript.js
index 8f4ff25bdafdf..3aaba9ec6b072 100644
--- a/packages/babel-types/src/definitions/typescript.js
+++ b/packages/babel-types/src/definitions/typescript.js
@@ -223,6 +223,25 @@ const unionOrIntersection = {
 defineType("TSUnionType", unionOrIntersection);
 defineType("TSIntersectionType", unionOrIntersection);
 
+defineType("TSConditionalType", {
+  aliases: ["TSType"],
+  visitor: ["checkType", "extendsType", "trueType", "falseType"],
+  fields: {
+    checkType: validateType("TSType"),
+    extendsType: validateType("TSType"),
+    trueType: validateType("TSType"),
+    falseType: validateType("TSType"),
+  },
+});
+
+defineType("TSInferType", {
+  aliases: ["TSType"],
+  visitor: ["typeParameter"],
+  fields: {
+    typeParameter: validateType("TSType"),
+  },
+});
+
 defineType("TSParenthesizedType", {
   aliases: ["TSType"],
   visitor: ["typeAnnotation"],
diff --git a/packages/babel-types/src/definitions/utils.js b/packages/babel-types/src/definitions/utils.js
index 4fc52eef84c9c..45cf72b297fa4 100644
--- a/packages/babel-types/src/definitions/utils.js
+++ b/packages/babel-types/src/definitions/utils.js
@@ -21,10 +21,10 @@ function getType(val) {
 }
 
 // TODO: Import and use Node instead of any
-opaque type Validator = (any, string, any) => void;
+type Validator = (any, string, any) => void;
 
 type FieldOptions = {
-  default?: boolean,
+  default?: any,
   optional?: boolean,
   validate?: Validator,
 };
diff --git a/packages/babel-types/src/retrievers/getBindingIdentifiers.js b/packages/babel-types/src/retrievers/getBindingIdentifiers.js
index d55a6c83262b3..bd289a8168177 100644
--- a/packages/babel-types/src/retrievers/getBindingIdentifiers.js
+++ b/packages/babel-types/src/retrievers/getBindingIdentifiers.js
@@ -94,6 +94,9 @@ getBindingIdentifiers.keys = {
 
   FunctionDeclaration: ["id", "params"],
   FunctionExpression: ["id", "params"],
+  ArrowFunctionExpression: ["params"],
+  ObjectMethod: ["params"],
+  ClassMethod: ["params"],
 
   ForInStatement: ["left"],
   ForOfStatement: ["left"],
diff --git a/packages/babel-types/src/validators/generated/index.js b/packages/babel-types/src/validators/generated/index.js
index 4a2215a50b117..874d8f65086eb 100644
--- a/packages/babel-types/src/validators/generated/index.js
+++ b/packages/babel-types/src/validators/generated/index.js
@@ -608,6 +608,12 @@ export function isTSUnionType(node: Object, opts?: Object): boolean {
 export function isTSIntersectionType(node: Object, opts?: Object): boolean {
   return is("TSIntersectionType", node, opts);
 }
+export function isTSConditionalType(node: Object, opts?: Object): boolean {
+  return is("TSConditionalType", node, opts);
+}
+export function isTSInferType(node: Object, opts?: Object): boolean {
+  return is("TSInferType", node, opts);
+}
 export function isTSParenthesizedType(node: Object, opts?: Object): boolean {
   return is("TSParenthesizedType", node, opts);
 }
diff --git a/packages/babel-types/test/cloning.js b/packages/babel-types/test/cloning.js
index 298f64fc84290..f86b7faa564bd 100644
--- a/packages/babel-types/test/cloning.js
+++ b/packages/babel-types/test/cloning.js
@@ -2,7 +2,7 @@ import * as t from "../lib";
 import assert from "assert";
 import { parse } from "babylon";
 
-suite("cloneNode", function() {
+describe("cloneNode", function() {
   it("should handle undefined", function() {
     const node = undefined;
     const cloned = t.cloneNode(node);
diff --git a/packages/babel-types/test/converters.js b/packages/babel-types/test/converters.js
index 29836b704a3f8..e0e46d90263d9 100644
--- a/packages/babel-types/test/converters.js
+++ b/packages/babel-types/test/converters.js
@@ -1,5 +1,4 @@
 import * as t from "../lib";
-import { assert } from "chai";
 import { parse } from "babylon";
 import generate from "@babel/generator";
 
@@ -14,49 +13,45 @@ function generateCode(node) {
 
 describe("converters", function() {
   it("toIdentifier", function() {
-    assert.equal(t.toIdentifier("swag-lord"), "swagLord");
+    expect(t.toIdentifier("swag-lord")).toBe("swagLord");
   });
 
   describe("valueToNode", function() {
     it("number", function() {
-      assert.deepEqual(t.valueToNode(Math.PI), t.numericLiteral(Math.PI));
-      assert.deepEqual(t.valueToNode(-Infinity), t.numericLiteral(-Infinity));
-      assert.deepEqual(t.valueToNode(NaN), t.numericLiteral(NaN));
+      expect(t.valueToNode(Math.PI)).toEqual(t.numericLiteral(Math.PI));
+      expect(t.valueToNode(-Infinity)).toEqual(t.numericLiteral(-Infinity));
+      expect(t.valueToNode(NaN)).toEqual(t.numericLiteral(NaN));
     });
     it("string", function() {
-      assert.deepEqual(
-        t.valueToNode('This is a "string"'),
+      expect(t.valueToNode('This is a "string"')).toEqual(
         t.stringLiteral('This is a "string"'),
       );
     });
     it("boolean", function() {
-      assert.deepEqual(t.valueToNode(true), t.booleanLiteral(true));
-      assert.deepEqual(t.valueToNode(false), t.booleanLiteral(false));
+      expect(t.valueToNode(true)).toEqual(t.booleanLiteral(true));
+      expect(t.valueToNode(false)).toEqual(t.booleanLiteral(false));
     });
     it("null", function() {
-      assert.deepEqual(t.valueToNode(null), t.nullLiteral());
+      expect(t.valueToNode(null)).toEqual(t.nullLiteral());
     });
     it("undefined", function() {
-      assert.deepEqual(t.valueToNode(undefined), t.identifier("undefined"));
+      expect(t.valueToNode(undefined)).toEqual(t.identifier("undefined"));
     });
     it("RegExp", function() {
-      assert.deepEqual(
-        t.valueToNode(/abc.+/gm),
-        t.regExpLiteral("abc.+", "gm"),
-      );
+      expect(t.valueToNode(/abc.+/gm)).toEqual(t.regExpLiteral("abc.+", "gm"));
     });
     it("array", function() {
-      assert.deepEqual(
-        t.valueToNode([1, "a"]),
+      expect(t.valueToNode([1, "a"])).toEqual(
         t.arrayExpression([t.numericLiteral(1), t.stringLiteral("a")]),
       );
     });
     it("object", function() {
-      assert.deepEqual(
+      expect(
         t.valueToNode({
           a: 1,
           "b c": 2,
         }),
+      ).toEqual(
         t.objectExpression([
           t.objectProperty(t.identifier("a"), t.numericLiteral(1)),
           t.objectProperty(t.stringLiteral("b c"), t.numericLiteral(2)),
@@ -64,12 +59,12 @@ describe("converters", function() {
       );
     });
     it("throws if cannot convert", function() {
-      assert.throws(function() {
+      expect(function() {
         t.valueToNode(Object);
-      });
-      assert.throws(function() {
+      }).toThrow();
+      expect(function() {
         t.valueToNode(Symbol());
-      });
+      }).toThrow();
     });
   });
   describe("toKeyAlias", function() {
@@ -78,24 +73,22 @@ describe("converters", function() {
       t.toKeyAlias.uid = 0;
     });
     it("doesn't change string literals", function() {
-      assert.equal(
+      expect(
         t.toKeyAlias(t.objectProperty(t.stringLiteral("a"), t.nullLiteral())),
-        '"a"',
-      );
+      ).toBe('"a"');
     });
     it("wraps around at Number.MAX_SAFE_INTEGER", function() {
-      assert.equal(
+      expect(
         t.toKeyAlias(
           t.objectMethod("method", t.identifier("a"), [], t.blockStatement([])),
         ),
-        "0",
-      );
+      ).toBe("0");
     });
   });
   describe("toStatement", function() {
     it("noop on statements", function() {
       const node = t.emptyStatement();
-      assert.equal(t.toStatement(node), node);
+      expect(t.toStatement(node)).toEqual(node);
       t.assertEmptyStatement(node);
     });
     it("mutate class expression to declaration", function() {
@@ -110,10 +103,10 @@ describe("converters", function() {
     });
     it("fail if class expression has no id", function() {
       const node = t.classExpression(null, null, t.classBody([]), []);
-      assert.throws(function() {
+      expect(function() {
         t.toStatement(node);
-      });
-      assert.strictEqual(t.toStatement(node, /* ignore = */ true), false);
+      }).toThrow(Error);
+      expect(t.toStatement(node, /* ignore = */ true)).toBe(false);
       t.assertClassExpression(node);
     });
     it("mutate function expression to declaration", function() {
@@ -127,10 +120,10 @@ describe("converters", function() {
     });
     it("fail if function expression has no id", function() {
       const node = t.functionExpression(null, [], t.blockStatement([]));
-      assert.throws(function() {
+      expect(function() {
         t.toStatement(node);
-      });
-      assert.strictEqual(t.toStatement(node, /* ignore = */ true), false);
+      }).toThrow(Error);
+      expect(t.toStatement(node, /* ignore = */ true)).toBe(false);
       t.assertFunctionExpression(node);
     });
     it("assignment expression", function() {
@@ -144,17 +137,17 @@ describe("converters", function() {
     });
     it("fail if cannot convert node type", function() {
       const node = t.yieldExpression(t.identifier("foo"));
-      assert.throws(function() {
+      expect(function() {
         t.toStatement(node);
-      });
-      assert.strictEqual(t.toStatement(node, /* ignore = */ true), false);
+      }).toThrow(Error);
+      expect(t.toStatement(node, /* ignore = */ true)).toBe(false);
       t.assertYieldExpression(node);
     });
   });
   describe("toExpression", function() {
     it("noop on expressions", function() {
       const node = t.identifier("a");
-      assert.equal(t.toExpression(node), node);
+      expect(t.toExpression(node)).toEqual(node);
       t.assertIdentifier(node);
     });
     it("mutate class declaration to expression", function() {
@@ -200,14 +193,14 @@ describe("converters", function() {
       const inner = t.yieldExpression(t.identifier("foo"));
       const node = t.expressionStatement(inner);
       t.assertYieldExpression(t.toExpression(node));
-      assert.equal(t.toExpression(node), inner);
+      expect(t.toExpression(node)).toEqual(inner);
       t.assertExpressionStatement(node);
     });
     it("fail if cannot convert node type", function() {
       const node = t.program([]);
-      assert.throws(function() {
+      expect(function() {
         t.toExpression(node);
-      });
+      }).toThrow(Error);
       t.assertProgram(node);
     });
   });
@@ -224,95 +217,94 @@ describe("converters", function() {
       const node = t.identifier("a");
       const sequence = t.toSequenceExpression([undefinedNode, node], scope);
       t.assertSequenceExpression(sequence);
-      assert.equal(sequence.expressions[0], undefinedNode);
-      assert.equal(sequence.expressions[1], node);
+      expect(sequence.expressions[0]).toBe(undefinedNode);
+      expect(sequence.expressions[1]).toBe(node);
       t.assertIdentifier(node);
     });
     it("avoids sequence for single node", function() {
       const node = t.identifier("a");
       let sequence = t.toSequenceExpression([node], scope);
-      assert.equal(sequence, node);
+      expect(sequence).toBe(node);
 
       const block = t.blockStatement([t.expressionStatement(node)]);
       sequence = t.toSequenceExpression([block], scope);
-      assert.equal(sequence, node);
+      expect(sequence).toBe(node);
     });
     it("gathers expression", function() {
       const node = t.identifier("a");
       const sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.equal(sequence.expressions[1], node);
+      expect(sequence.expressions[1]).toBe(node);
     });
     it("gathers expression statement", function() {
       const node = t.expressionStatement(t.identifier("a"));
       const sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.equal(sequence.expressions[1], node.expression);
+      expect(sequence.expressions[1]).toBe(node.expression);
     });
     it("gathers var declarations", function() {
       const node = parseCode("var a, b = 1;");
       const sequence = t.toSequenceExpression([undefinedNode, node], scope);
       t.assertIdentifier(scope[0].id, { name: "a" });
       t.assertIdentifier(scope[1].id, { name: "b" });
-      assert.equal(generateCode(sequence.expressions[1]), "b = 1");
-      assert.equal(generateCode(sequence.expressions[2]), "undefined");
+      expect(generateCode(sequence.expressions[1])).toBe("b = 1");
+      expect(generateCode(sequence.expressions[2])).toBe("undefined");
     });
     it("skips undefined if expression after var declaration", function() {
       const node = parseCode("{ var a, b = 1; true }");
       const sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.equal(generateCode(sequence.expressions[1]), "b = 1, true");
+      expect(generateCode(sequence.expressions[1])).toBe("b = 1, true");
     });
     it("bails on let and const declarations", function() {
       let node = parseCode("let a, b = 1;");
       let sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.isUndefined(sequence);
+      expect(sequence).toBeUndefined();
 
       node = parseCode("const b = 1;");
       sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.isUndefined(sequence);
+      expect(sequence).toBeUndefined();
     });
     it("gathers if statements", function() {
       let node = parseCode("if (true) { true }");
       let sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.equal(
-        generateCode(sequence.expressions[1]),
+      expect(generateCode(sequence.expressions[1])).toBe(
         "true ? true : undefined",
       );
 
       node = parseCode("if (true) { true } else { b }");
       sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.equal(generateCode(sequence.expressions[1]), "true ? true : b");
+      expect(generateCode(sequence.expressions[1])).toBe("true ? true : b");
     });
     it("bails in if statements if recurse bails", function() {
       let node = parseCode("if (true) { return }");
       let sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.isUndefined(sequence);
+      expect(sequence).toBeUndefined();
 
       node = parseCode("if (true) { true } else { return }");
       sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.isUndefined(sequence);
+      expect(sequence).toBeUndefined();
     });
     it("gathers block statements", function() {
       let node = parseCode("{ a }");
       let sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.equal(generateCode(sequence.expressions[1]), "a");
+      expect(generateCode(sequence.expressions[1])).toBe("a");
 
       node = parseCode("{ a; b; }");
       sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.equal(generateCode(sequence.expressions[1]), "a, b");
+      expect(generateCode(sequence.expressions[1])).toBe("a, b");
     });
     it("bails in block statements if recurse bails", function() {
       const node = parseCode("{ return }");
       const sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.isUndefined(sequence);
+      expect(sequence).toBeUndefined();
     });
     it("gathers empty statements", function() {
       const node = parseCode(";");
       const sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.equal(generateCode(sequence.expressions[1]), "undefined");
+      expect(generateCode(sequence.expressions[1])).toBe("undefined");
     });
     it("skips empty statement if expression afterwards", function() {
       const node = parseCode("{ ; true }");
       const sequence = t.toSequenceExpression([undefinedNode, node], scope);
-      assert.equal(generateCode(sequence.expressions[1]), "true");
+      expect(generateCode(sequence.expressions[1])).toBe("true");
     });
   });
 });
diff --git a/packages/babel-types/test/validators.js b/packages/babel-types/test/validators.js
index f3466fa3c7422..fd323ebe14e81 100644
--- a/packages/babel-types/test/validators.js
+++ b/packages/babel-types/test/validators.js
@@ -1,84 +1,83 @@
 import * as t from "../lib";
-import assert from "assert";
 import { parse } from "babylon";
 
-suite("validators", function() {
-  suite("isNodesEquivalent", function() {
+describe("validators", function() {
+  describe("isNodesEquivalent", function() {
     it("should handle simple cases", function() {
       const mem = t.memberExpression(t.identifier("a"), t.identifier("b"));
-      assert(t.isNodesEquivalent(mem, mem) === true);
+      expect(t.isNodesEquivalent(mem, mem)).toBe(true);
 
       const mem2 = t.memberExpression(t.identifier("a"), t.identifier("c"));
-      assert(t.isNodesEquivalent(mem, mem2) === false);
+      expect(t.isNodesEquivalent(mem, mem2)).toBe(false);
     });
 
     it("should handle full programs", function() {
-      assert(t.isNodesEquivalent(parse("1 + 1"), parse("1+1")) === true);
-      assert(t.isNodesEquivalent(parse("1 + 1"), parse("1+2")) === false);
+      expect(t.isNodesEquivalent(parse("1 + 1"), parse("1+1"))).toBe(true);
+      expect(t.isNodesEquivalent(parse("1 + 1"), parse("1+2"))).toBe(false);
     });
 
     it("should handle complex programs", function() {
       const program = "'use strict'; function lol() { wow();return 1; }";
 
-      assert(t.isNodesEquivalent(parse(program), parse(program)) === true);
+      expect(t.isNodesEquivalent(parse(program), parse(program))).toBe(true);
 
       const program2 = "'use strict'; function lol() { wow();return -1; }";
 
-      assert(t.isNodesEquivalent(parse(program), parse(program2)) === false);
+      expect(t.isNodesEquivalent(parse(program), parse(program2))).toBe(false);
     });
 
     it("rejects 'await' as an identifier", function() {
-      assert(t.isValidIdentifier("await") === false);
+      expect(t.isValidIdentifier("await")).toBe(false);
     });
   });
 
-  suite("isCompatTag", function() {
+  describe("isCompatTag", function() {
     it("should handle lowercase tag names", function() {
-      assert(t.react.isCompatTag("div"));
-      assert(t.react.isCompatTag("a")); // one letter
-      assert(t.react.isCompatTag("h3")); // letters and numbers
+      expect(t.react.isCompatTag("div")).toBe(true);
+      expect(t.react.isCompatTag("a")).toBe(true); // one letter
+      expect(t.react.isCompatTag("h3")).toBe(true); // letters and numbers
     });
 
     it("should handle custom element tag names", function() {
-      assert(t.react.isCompatTag("plastic-button")); // ascii letters
-      assert(t.react.isCompatTag("math-α")); // non-latin chars
-      assert(t.react.isCompatTag("img-viewer2")); // numbers
-      assert(t.react.isCompatTag("emotion-😍")); // emoji
+      expect(t.react.isCompatTag("plastic-button")).toBe(true); // ascii letters
+      expect(t.react.isCompatTag("math-α")).toBe(true); // non-latin chars
+      expect(t.react.isCompatTag("img-viewer2")).toBe(true); // numbers
+      expect(t.react.isCompatTag("emotion-😍")).toBe(true); // emoji
     });
 
     it("accepts trailing dash '-' in custom element tag names", function() {
-      assert(t.react.isCompatTag("div-"));
-      assert(t.react.isCompatTag("a-"));
-      assert(t.react.isCompatTag("h3-"));
+      expect(t.react.isCompatTag("div-")).toBe(true);
+      expect(t.react.isCompatTag("a-")).toBe(true);
+      expect(t.react.isCompatTag("h3-")).toBe(true);
     });
 
     it("rejects empty or null tag names", function() {
-      assert(t.react.isCompatTag(null) === false);
-      assert(t.react.isCompatTag() === false);
-      assert(t.react.isCompatTag(undefined) === false);
-      assert(t.react.isCompatTag("") === false);
+      expect(t.react.isCompatTag(null)).toBe(false);
+      expect(t.react.isCompatTag()).toBe(false);
+      expect(t.react.isCompatTag(undefined)).toBe(false);
+      expect(t.react.isCompatTag("")).toBe(false);
     });
 
     it("rejects tag names starting with an uppercase letter", function() {
-      assert(t.react.isCompatTag("Div") === false);
-      assert(t.react.isCompatTag("A") === false);
-      assert(t.react.isCompatTag("H3") === false);
+      expect(t.react.isCompatTag("Div")).toBe(false);
+      expect(t.react.isCompatTag("A")).toBe(false);
+      expect(t.react.isCompatTag("H3")).toBe(false);
     });
 
     it("rejects all uppercase tag names", function() {
-      assert(t.react.isCompatTag("DIV") === false);
-      assert(t.react.isCompatTag("A") === false);
-      assert(t.react.isCompatTag("H3") === false);
+      expect(t.react.isCompatTag("DIV")).toBe(false);
+      expect(t.react.isCompatTag("A")).toBe(false);
+      expect(t.react.isCompatTag("H3")).toBe(false);
     });
 
     it("rejects leading dash '-'", function() {
-      assert(t.react.isCompatTag("-div") === false);
-      assert(t.react.isCompatTag("-a") === false);
-      assert(t.react.isCompatTag("-h3") === false);
+      expect(t.react.isCompatTag("-div")).toBe(false);
+      expect(t.react.isCompatTag("-a")).toBe(false);
+      expect(t.react.isCompatTag("-h3")).toBe(false);
     });
   });
 
-  suite("patterns", function() {
+  describe("patterns", function() {
     it("allows nested pattern structures", function() {
       const pattern = t.objectPattern([
         t.objectProperty(
@@ -93,7 +92,7 @@ suite("validators", function() {
         ),
       ]);
 
-      assert(t.isNodesEquivalent(pattern, pattern) === true);
+      expect(t.isNodesEquivalent(pattern, pattern)).toBe(true);
     });
   });
 });
diff --git a/packages/babylon/README.md b/packages/babylon/README.md
index 8f75fe8c0f7e3..c1762058bea1b 100644
--- a/packages/babylon/README.md
+++ b/packages/babylon/README.md
@@ -66,9 +66,7 @@ It is based on [ESTree spec][] with the following deviations:
 - [Program][] and [BlockStatement][] contain additional `directives` field with [Directive][] and [DirectiveLiteral][]
 - [ClassMethod][], [ObjectProperty][], and [ObjectMethod][] value property's properties in [FunctionExpression][] is coerced/brought into the main method node.
 
-AST for JSX code is based on [Facebook JSX AST][] with the addition of one node type:
-
-- `JSXText`
+AST for JSX code is based on [Facebook JSX AST][].
 
 [Babel AST format]: https://github.com/babel/babylon/blob/master/ast/spec.md
 [ESTree spec]: https://github.com/estree/estree
diff --git a/packages/babylon/package.json b/packages/babylon/package.json
index c3ba740eddd58..da8fec58a63f4 100644
--- a/packages/babylon/package.json
+++ b/packages/babylon/package.json
@@ -1,6 +1,6 @@
 {
   "name": "babylon",
-  "version": "7.0.0-beta.39",
+  "version": "7.0.0-beta.42",
   "description": "A JavaScript parser",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -23,8 +23,8 @@
     "node": ">=4.2.0"
   },
   "devDependencies": {
-    "@babel/helper-fixtures": "7.0.0-beta.39",
-    "charcodes": "0.0.10",
+    "@babel/helper-fixtures": "7.0.0-beta.42",
+    "charcodes": "0.1.0",
     "unicode-10.0.0": "^0.7.4"
   },
   "bin": {
diff --git a/packages/babylon/src/index.js b/packages/babylon/src/index.js
index 7071a312b3e3e..a90f0af0f67ae 100755
--- a/packages/babylon/src/index.js
+++ b/packages/babylon/src/index.js
@@ -22,11 +22,12 @@ export function parse(input: string, options?: Options): File {
     options = Object.assign({}, options);
     try {
       options.sourceType = "module";
-      const ast = getParser(options, input).parse();
+      const parser = getParser(options, input);
+      const ast = parser.parse();
 
       // Rather than try to parse as a script first, we opt to parse as a module and convert back
       // to a script where possible to avoid having to do a full re-parse of the input content.
-      if (!hasModuleSyntax(ast)) ast.program.sourceType = "script";
+      if (!parser.sawUnambiguousESM) ast.program.sourceType = "script";
       return ast;
     } catch (moduleError) {
       try {
@@ -111,16 +112,3 @@ function getParserClass(
   }
   return cls;
 }
-
-function hasModuleSyntax(ast) {
-  return ast.program.body.some(
-    child =>
-      (child.type === "ImportDeclaration" &&
-        (!child.importKind || child.importKind === "value")) ||
-      (child.type === "ExportNamedDeclaration" &&
-        (!child.exportKind || child.exportKind === "value")) ||
-      (child.type === "ExportAllDeclaration" &&
-        (!child.exportKind || child.exportKind === "value")) ||
-      child.type === "ExportDefaultDeclaration",
-  );
-}
diff --git a/packages/babylon/src/parser/base.js b/packages/babylon/src/parser/base.js
index 972d60c800796..6e7ab90d65776 100644
--- a/packages/babylon/src/parser/base.js
+++ b/packages/babylon/src/parser/base.js
@@ -11,6 +11,7 @@ export default class BaseParser {
   inModule: boolean;
   plugins: { [key: string]: boolean };
   filename: ?string;
+  sawUnambiguousESM: boolean = false;
 
   // Initialized by Tokenizer
   state: State;
diff --git a/packages/babylon/src/parser/expression.js b/packages/babylon/src/parser/expression.js
index 84727492d2c20..b390d56e94c26 100644
--- a/packages/babylon/src/parser/expression.js
+++ b/packages/babylon/src/parser/expression.js
@@ -427,7 +427,10 @@ export default class ExpressionParser extends LValParser {
     startLoc: Position,
     noCalls?: ?boolean,
   ): N.Expression {
-    const state = { stop: false };
+    const state = {
+      optionalChainMember: false,
+      stop: false,
+    };
     do {
       base = this.parseSubscript(base, startPos, startLoc, noCalls, state);
     } while (!state.stop);
@@ -440,7 +443,7 @@ export default class ExpressionParser extends LValParser {
     startPos: number,
     startLoc: Position,
     noCalls: ?boolean,
-    state: { stop: boolean, optionalChainMember?: boolean },
+    state: N.ParseSubscriptState,
   ): N.Expression {
     if (!noCalls && this.eat(tt.doubleColon)) {
       const node = this.startNodeAt(startPos, startLoc);
@@ -555,14 +558,13 @@ export default class ExpressionParser extends LValParser {
       const node = this.startNodeAt(startPos, startLoc);
       node.tag = base;
       node.quasi = this.parseTemplate(true);
-      if (!state.optionalChainMember) {
-        return this.finishNode(node, "TaggedTemplateExpression");
-      } else {
+      if (state.optionalChainMember) {
         this.raise(
           startPos,
           "Tagged Template Literals are not allowed in optionalChain",
         );
       }
+      return this.finishNode(node, "TaggedTemplateExpression");
     } else {
       state.stop = true;
       return base;
@@ -571,6 +573,7 @@ export default class ExpressionParser extends LValParser {
 
   atPossibleAsync(base: N.Expression): boolean {
     return (
+      !this.state.containsEsc &&
       this.state.potentialArrowAt === base.start &&
       base.type === "Identifier" &&
       base.name === "async" &&
@@ -738,6 +741,7 @@ export default class ExpressionParser extends LValParser {
       case tt.name: {
         node = this.startNode();
         const allowAwait = this.state.value === "await" && this.state.inAsync;
+        const containsEsc = this.state.containsEsc;
         const allowYield = this.shouldAllowYieldIdentifier();
         const id = this.parseIdentifier(allowAwait || allowYield);
 
@@ -746,6 +750,7 @@ export default class ExpressionParser extends LValParser {
             return this.parseAwait(node);
           }
         } else if (
+          !containsEsc &&
           id.name === "async" &&
           this.match(tt._function) &&
           !this.canInsertSemicolon()
@@ -914,9 +919,11 @@ export default class ExpressionParser extends LValParser {
       }
     }
 
+    const containsEsc = this.state.containsEsc;
+
     node.property = this.parseIdentifier(true);
 
-    if (node.property.name !== propertyName) {
+    if (node.property.name !== propertyName || containsEsc) {
       this.raise(
         node.property.start,
         `The only valid meta property for ${meta.name} is ${
@@ -948,8 +955,11 @@ export default class ExpressionParser extends LValParser {
       this.raise(
         id.start,
         `import.meta may appear only with 'sourceType: "module"'`,
+        { code: "BABEL_PARSER_SOURCETYPE_MODULE_REQUIRED" },
       );
     }
+    this.sawUnambiguousESM = true;
+
     return this.parseMetaProperty(node, id, "meta");
   }
 
@@ -1302,6 +1312,8 @@ export default class ExpressionParser extends LValParser {
         isGenerator = this.eat(tt.star);
       }
 
+      const containsEsc = this.state.containsEsc;
+
       if (!isPattern && this.isContextual("async")) {
         if (isGenerator) this.unexpected();
 
@@ -1336,6 +1348,7 @@ export default class ExpressionParser extends LValParser {
         isAsync,
         isPattern,
         refShorthandDefaultPos,
+        containsEsc,
       );
       this.checkPropClash(prop, propHash);
 
@@ -1381,17 +1394,24 @@ export default class ExpressionParser extends LValParser {
   }
 
   // get methods aren't allowed to have any parameters
-  // set methods must have exactly 1 parameter
-  checkGetterSetterParamCount(method: N.ObjectMethod | N.ClassMethod): void {
+  // set methods must have exactly 1 parameter which is not a rest parameter
+  checkGetterSetterParams(method: N.ObjectMethod | N.ClassMethod): void {
     const paramCount = method.kind === "get" ? 0 : 1;
+    const start = method.start;
     if (method.params.length !== paramCount) {
-      const start = method.start;
       if (method.kind === "get") {
-        this.raise(start, "getter should have no params");
+        this.raise(start, "getter must not have any formal parameters");
       } else {
-        this.raise(start, "setter should have exactly one param");
+        this.raise(start, "setter must have exactly one formal parameter");
       }
     }
+
+    if (method.kind === "set" && method.params[0].type === "RestElement") {
+      this.raise(
+        start,
+        "setter function argument must not be a rest parameter",
+      );
+    }
   }
 
   parseObjectMethod(
@@ -1399,6 +1419,7 @@ export default class ExpressionParser extends LValParser {
     isGenerator: boolean,
     isAsync: boolean,
     isPattern: boolean,
+    containsEsc: boolean,
   ): ?N.ObjectMethod {
     if (isAsync || isGenerator || this.match(tt.parenL)) {
       if (isPattern) this.unexpected();
@@ -1413,7 +1434,7 @@ export default class ExpressionParser extends LValParser {
       );
     }
 
-    if (this.isGetterOrSetterMethod(prop, isPattern)) {
+    if (!containsEsc && this.isGetterOrSetterMethod(prop, isPattern)) {
       if (isGenerator || isAsync) this.unexpected();
       prop.kind = prop.key.name;
       this.parsePropertyName(prop);
@@ -1424,7 +1445,7 @@ export default class ExpressionParser extends LValParser {
         /* isConstructor */ false,
         "ObjectMethod",
       );
-      this.checkGetterSetterParamCount(prop);
+      this.checkGetterSetterParams(prop);
       return prop;
     }
   }
@@ -1481,9 +1502,16 @@ export default class ExpressionParser extends LValParser {
     isAsync: boolean,
     isPattern: boolean,
     refShorthandDefaultPos: ?Pos,
+    containsEsc: boolean,
   ): void {
     const node =
-      this.parseObjectMethod(prop, isGenerator, isAsync, isPattern) ||
+      this.parseObjectMethod(
+        prop,
+        isGenerator,
+        isAsync,
+        isPattern,
+        containsEsc,
+      ) ||
       this.parseObjectProperty(
         prop,
         startPos,
@@ -1676,9 +1704,7 @@ export default class ExpressionParser extends LValParser {
 
     const oldStrict = this.state.strict;
     if (isStrict) this.state.strict = isStrict;
-    if (node.id) {
-      this.checkReservedWord(node.id, node.start, true, true);
-    }
+
     if (checkLVal) {
       const nameHash: any = Object.create(null);
       if (node.id) {
diff --git a/packages/babylon/src/parser/location.js b/packages/babylon/src/parser/location.js
index f3b0fb656d077..79db584a49958 100644
--- a/packages/babylon/src/parser/location.js
+++ b/packages/babylon/src/parser/location.js
@@ -13,7 +13,13 @@ export default class LocationParser extends CommentsParser {
   raise(
     pos: number,
     message: string,
-    missingPluginNames?: Array<string>,
+    {
+      missingPluginNames,
+      code,
+    }: {
+      missingPluginNames?: Array<string>,
+      code?: string,
+    } = {},
   ): empty {
     const loc = getLineInfo(this.input, pos);
     message += ` (${loc.line}:${loc.column})`;
@@ -26,6 +32,9 @@ export default class LocationParser extends CommentsParser {
     if (missingPluginNames) {
       err.missingPlugin = missingPluginNames;
     }
+    if (code !== undefined) {
+      err.code = code;
+    }
     throw err;
   }
 }
diff --git a/packages/babylon/src/parser/statement.js b/packages/babylon/src/parser/statement.js
index 1d443f06f7ee9..f86f7af9b9ea8 100644
--- a/packages/babylon/src/parser/statement.js
+++ b/packages/babylon/src/parser/statement.js
@@ -146,8 +146,25 @@ export default class StatementParser extends ExpressionParser {
         let result;
         if (starttype == tt._import) {
           result = this.parseImport(node);
+
+          if (
+            result.type === "ImportDeclaration" &&
+            (!result.importKind || result.importKind === "value")
+          ) {
+            this.sawUnambiguousESM = true;
+          }
         } else {
           result = this.parseExport(node);
+
+          if (
+            (result.type === "ExportNamedDeclaration" &&
+              (!result.exportKind || result.exportKind === "value")) ||
+            (result.type === "ExportAllDeclaration" &&
+              (!result.exportKind || result.exportKind === "value")) ||
+            result.type === "ExportDefaultDeclaration"
+          ) {
+            this.sawUnambiguousESM = true;
+          }
         }
 
         this.assertModuleNodeAllowed(node);
@@ -155,7 +172,7 @@ export default class StatementParser extends ExpressionParser {
         return result;
       }
       case tt.name:
-        if (this.state.value === "async") {
+        if (this.isContextual("async")) {
           // peek ahead and see if next token is a function
           const state = this.state.clone();
           this.next();
@@ -192,6 +209,9 @@ export default class StatementParser extends ExpressionParser {
       this.raise(
         node.start,
         `'import' and 'export' may appear only with 'sourceType: "module"'`,
+        {
+          code: "BABEL_PARSER_SOURCETYPE_MODULE_REQUIRED",
+        },
       );
     }
   }
@@ -364,8 +384,19 @@ export default class StatementParser extends ExpressionParser {
       this.finishNode(init, "VariableDeclaration");
 
       if (this.match(tt._in) || this.isContextual("of")) {
-        if (init.declarations.length === 1 && !init.declarations[0].init) {
-          return this.parseForIn(node, init, forAwait);
+        if (init.declarations.length === 1) {
+          const declaration = init.declarations[0];
+          const isForInInitializer =
+            varKind === tt._var &&
+            declaration.init &&
+            declaration.id.type != "ObjectPattern" &&
+            declaration.id.type != "ArrayPattern" &&
+            !this.isContextual("of");
+          if (this.state.strict && isForInInitializer) {
+            this.raise(this.state.start, "for-in initializer in strict mode");
+          } else if (isForInInitializer || !declaration.init) {
+            return this.parseForIn(node, init, forAwait);
+          }
         }
       }
       if (forAwait) {
@@ -956,8 +987,11 @@ export default class StatementParser extends ExpressionParser {
     state: { hadConstructor: boolean },
   ): void {
     let isStatic = false;
+    const containsEsc = this.state.containsEsc;
+
     if (this.match(tt.name) && this.state.value === "static") {
       const key = this.parseIdentifier(true); // eats 'static'
+
       if (this.isClassMethod()) {
         const method: N.ClassMethod = (member: any);
 
@@ -983,7 +1017,10 @@ export default class StatementParser extends ExpressionParser {
         prop.static = false;
         classBody.body.push(this.parseClassProperty(prop));
         return;
+      } else if (containsEsc) {
+        throw this.unexpected();
       }
+
       // otherwise something static
       isStatic = true;
     }
@@ -1147,7 +1184,7 @@ export default class StatementParser extends ExpressionParser {
         );
       }
 
-      this.checkGetterSetterParamCount(publicMethod);
+      this.checkGetterSetterParams(publicMethod);
     } else if (this.isLineTerminator()) {
       // an uninitialized class property (due to ASI, since we don't otherwise recognize the next token)
       if (isPrivate) {
@@ -1488,7 +1525,10 @@ export default class StatementParser extends ExpressionParser {
           node.declaration.type === "FunctionDeclaration" ||
           node.declaration.type === "ClassDeclaration"
         ) {
-          this.checkDuplicateExports(node, node.declaration.id.name);
+          const id = node.declaration.id;
+          if (!id) throw new Error("Assertion failure");
+
+          this.checkDuplicateExports(node, id.name);
         } else if (node.declaration.type === "VariableDeclaration") {
           for (const declaration of node.declaration.declarations) {
             this.checkDeclaration(declaration.id);
diff --git a/packages/babylon/src/parser/util.js b/packages/babylon/src/parser/util.js
index c89e40bd8f811..7871141ca7a03 100644
--- a/packages/babylon/src/parser/util.js
+++ b/packages/babylon/src/parser/util.js
@@ -46,7 +46,11 @@ export default class UtilParser extends Tokenizer {
   // Tests whether parsed token is a contextual keyword.
 
   isContextual(name: string): boolean {
-    return this.match(tt.name) && this.state.value === name;
+    return (
+      this.match(tt.name) &&
+      this.state.value === name &&
+      !this.state.containsEsc
+    );
   }
 
   isLookaheadContextual(name: string): boolean {
@@ -57,7 +61,7 @@ export default class UtilParser extends Tokenizer {
   // Consumes contextual keyword if possible.
 
   eatContextual(name: string): boolean {
-    return this.state.value === name && this.eat(tt.name);
+    return this.isContextual(name) && this.eat(tt.name);
   }
 
   // Asserts that following token is given contextual keyword.
@@ -120,7 +124,7 @@ export default class UtilParser extends Tokenizer {
       throw this.raise(
         pos != null ? pos : this.state.start,
         `This experimental syntax requires enabling the parser plugin: '${name}'`,
-        [name],
+        { missingPluginNames: [name] },
       );
     }
 
@@ -134,7 +138,7 @@ export default class UtilParser extends Tokenizer {
         `This experimental syntax requires enabling one of the following parser plugin(s): '${names.join(
           ", ",
         )}'`,
-        names,
+        { missingPluginNames: names },
       );
     }
   }
diff --git a/packages/babylon/src/plugins/estree.js b/packages/babylon/src/plugins/estree.js
index 81ed5a2010b04..3da593f7d9f36 100644
--- a/packages/babylon/src/plugins/estree.js
+++ b/packages/babylon/src/plugins/estree.js
@@ -82,17 +82,24 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       }
     }
 
-    checkGetterSetterParamCount(prop: N.ObjectMethod | N.ClassMethod): void {
+    checkGetterSetterParams(method: N.ObjectMethod | N.ClassMethod): void {
+      const prop = ((method: any): N.EstreeProperty | N.EstreeMethodDefinition);
       const paramCount = prop.kind === "get" ? 0 : 1;
-      // $FlowFixMe (prop.value present for ObjectMethod, but for ClassMethod should use prop.params?)
+      const start = prop.start;
       if (prop.value.params.length !== paramCount) {
-        const start = prop.start;
         if (prop.kind === "get") {
-          this.raise(start, "getter should have no params");
+          this.raise(start, "getter must not have any formal parameters");
         } else {
-          this.raise(start, "setter should have exactly one param");
+          this.raise(start, "setter must have exactly one formal parameter");
         }
       }
+
+      if (prop.kind === "set" && prop.value.params[0].type === "RestElement") {
+        this.raise(
+          start,
+          "setter function argument must not be a rest parameter",
+        );
+      }
     }
 
     checkLVal(
@@ -281,12 +288,14 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       isGenerator: boolean,
       isAsync: boolean,
       isPattern: boolean,
+      containsEsc: boolean,
     ): ?N.ObjectMethod {
       const node: N.EstreeProperty = (super.parseObjectMethod(
         prop,
         isGenerator,
         isAsync,
         isPattern,
+        containsEsc,
       ): any);
 
       if (node) {
diff --git a/packages/babylon/src/plugins/flow.js b/packages/babylon/src/plugins/flow.js
index b5c904ef19d29..c94cc8ba443da 100644
--- a/packages/babylon/src/plugins/flow.js
+++ b/packages/babylon/src/plugins/flow.js
@@ -763,7 +763,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
             this.startNodeAt(node.start, node.loc.start),
           );
           if (kind === "get" || kind === "set") {
-            this.flowCheckGetterSetterParamCount(node);
+            this.flowCheckGetterSetterParams(node);
           }
         } else {
           if (kind !== "init") this.unexpected();
@@ -783,20 +783,29 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       }
     }
 
-    // This is similar to checkGetterSetterParamCount, but as
+    // This is similar to checkGetterSetterParams, but as
     // babylon uses non estree properties we cannot reuse it here
-    flowCheckGetterSetterParamCount(
+    flowCheckGetterSetterParams(
       property: N.FlowObjectTypeProperty | N.FlowObjectTypeSpreadProperty,
     ): void {
       const paramCount = property.kind === "get" ? 0 : 1;
-      if (property.value.params.length !== paramCount) {
-        const start = property.start;
+      const start = property.start;
+      const length =
+        property.value.params.length + (property.value.rest ? 1 : 0);
+      if (length !== paramCount) {
         if (property.kind === "get") {
-          this.raise(start, "getter should have no params");
+          this.raise(start, "getter must not have any formal parameters");
         } else {
-          this.raise(start, "setter should have exactly one param");
+          this.raise(start, "setter must have exactly one formal parameter");
         }
       }
+
+      if (property.kind === "set" && property.value.rest) {
+        this.raise(
+          start,
+          "setter function argument must not be a rest parameter",
+        );
+      }
     }
 
     flowObjectTypeSemicolon(): void {
@@ -1632,7 +1641,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
         return this.finishOp(tt.relational, 1);
       } else if (isIteratorStart(code, next)) {
         this.state.isIterator = true;
-        return super.readWord(code);
+        return super.readWord();
       } else {
         return super.readToken(code);
       }
@@ -1828,6 +1837,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       isAsync: boolean,
       isPattern: boolean,
       refShorthandDefaultPos: ?Pos,
+      containsEsc: boolean,
     ): void {
       if ((prop: $FlowFixMe).variance) {
         this.unexpected((prop: $FlowFixMe).variance.start);
@@ -1850,6 +1860,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
         isAsync,
         isPattern,
         refShorthandDefaultPos,
+        containsEsc,
       );
 
       // add typeParameters if we found them
diff --git a/packages/babylon/src/plugins/typescript.js b/packages/babylon/src/plugins/typescript.js
index 693edfe59f2a4..58074479e04ee 100644
--- a/packages/babylon/src/plugins/typescript.js
+++ b/packages/babylon/src/plugins/typescript.js
@@ -617,11 +617,22 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       return this.finishNode(node, "TSTypeOperator");
     }
 
+    tsParseInferType(): N.TsInferType {
+      const node = this.startNode();
+      this.expectContextual("infer");
+      const typeParameter = this.startNode();
+      typeParameter.name = this.parseIdentifierName(typeParameter.start);
+      node.typeParameter = this.finishNode(typeParameter, "TypeParameter");
+      return this.finishNode(node, "TSInferType");
+    }
+
     tsParseTypeOperatorOrHigher(): N.TsType {
       const operator = ["keyof", "unique"].find(kw => this.isContextual(kw));
       return operator
         ? this.tsParseTypeOperator(operator)
-        : this.tsParseArrayTypeOrHigher();
+        : this.isContextual("infer")
+          ? this.tsParseInferType()
+          : this.tsParseArrayTypeOrHigher();
     }
 
     tsParseUnionOrIntersectionType(
@@ -774,6 +785,21 @@ export default (superClass: Class<Parser>): Class<Parser> =>
     tsParseType(): N.TsType {
       // Need to set `state.inType` so that we don't parse JSX in a type context.
       assert(this.state.inType);
+      const type = this.tsParseNonConditionalType();
+      if (this.hasPrecedingLineBreak() || !this.eat(tt._extends)) {
+        return type;
+      }
+      const node: N.TsConditionalType = this.startNodeAtNode(type);
+      node.checkType = type;
+      node.extendsType = this.tsParseNonConditionalType();
+      this.expect(tt.question);
+      node.trueType = this.tsParseType();
+      this.expect(tt.colon);
+      node.falseType = this.tsParseType();
+      return this.finishNode(node, "TSConditionalType");
+    }
+
+    tsParseNonConditionalType(): N.TsType {
       if (this.tsIsStartOfFunctionType()) {
         return this.tsParseFunctionOrConstructorType("TSFunctionType");
       }
@@ -860,7 +886,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       }
     }
 
-    tsEatThenParseType(token: TokenType): N.TsType | undefined {
+    tsEatThenParseType(token: TokenType): N.TsType | typeof undefined {
       return !this.match(token) ? undefined : this.tsNextThenParseType();
     }
 
@@ -1300,7 +1326,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       startPos: number,
       startLoc: Position,
       noCalls: ?boolean,
-      state: { stop: boolean },
+      state: N.ParseSubscriptState,
     ): N.Expression {
       if (!this.hasPrecedingLineBreak() && this.eat(tt.bang)) {
         const nonNullExpression: N.TsNonNullExpression = this.startNodeAt(
@@ -1665,6 +1691,10 @@ export default (superClass: Class<Parser>): Class<Parser> =>
     }
 
     parseClassProperty(node: N.ClassProperty): N.ClassProperty {
+      if (!node.optional && this.eat(tt.bang)) {
+        node.definite = true;
+      }
+
       const type = this.tsTryParseTypeAnnotation();
       if (type) node.typeAnnotation = type;
       return super.parseClassProperty(node);
@@ -1726,6 +1756,10 @@ export default (superClass: Class<Parser>): Class<Parser> =>
     // `let x: number;`
     parseVarHead(decl: N.VariableDeclarator): void {
       super.parseVarHead(decl);
+      if (decl.id.type === "Identifier" && this.eat(tt.bang)) {
+        decl.definite = true;
+      }
+
       const type = this.tsTryParseTypeAnnotation();
       if (type) {
         decl.id.typeAnnotation = type;
@@ -1954,7 +1988,9 @@ export default (superClass: Class<Parser>): Class<Parser> =>
     }
 
     isClassProperty(): boolean {
-      return this.match(tt.colon) || super.isClassProperty();
+      return (
+        this.match(tt.bang) || this.match(tt.colon) || super.isClassProperty()
+      );
     }
 
     parseMaybeDefault(...args): N.Pattern {
diff --git a/packages/babylon/src/tokenizer/index.js b/packages/babylon/src/tokenizer/index.js
index 3fce132907710..48c1efc25df26 100644
--- a/packages/babylon/src/tokenizer/index.js
+++ b/packages/babylon/src/tokenizer/index.js
@@ -464,9 +464,17 @@ export default class Tokenizer extends LocationParser {
     const next = this.input.charCodeAt(this.state.pos + 1);
 
     if (next === code) {
+      const assign =
+        this.input.charCodeAt(this.state.pos + 2) === charCodes.equalsTo;
+      if (assign) {
+        // $FlowFixMe
+        this.expectPlugin("logicalAssignment");
+      }
       this.finishOp(
-        code === charCodes.verticalBar ? tt.logicalOR : tt.logicalAND,
-        2,
+        assign
+          ? tt.assign
+          : code === charCodes.verticalBar ? tt.logicalOR : tt.logicalAND,
+        assign ? 3 : 2,
       );
       return;
     }
@@ -1273,7 +1281,7 @@ export default class Tokenizer extends LocationParser {
     return word + this.input.slice(chunkStart, this.state.pos);
   }
 
-  isIterator(word): boolean {
+  isIterator(word: string): boolean {
     return word === "@@iterator" || word === "@@asyncIterator";
   }
 
diff --git a/packages/babylon/src/tokenizer/state.js b/packages/babylon/src/tokenizer/state.js
index eab456ad6cc20..026386e21fb78 100644
--- a/packages/babylon/src/tokenizer/state.js
+++ b/packages/babylon/src/tokenizer/state.js
@@ -22,7 +22,7 @@ export default class State {
     this.noArrowParamsConversionAt = [];
 
     // eslint-disable-next-line max-len
-    this.inMethod = this.inFunction = this.inParameters = this.maybeInArrowParameters = this.inGenerator = this.inAsync = this.inPropertyName = this.inType = this.inClassProperty = this.noAnonFunctionType = false;
+    this.inMethod = this.inFunction = this.inParameters = this.maybeInArrowParameters = this.inGenerator = this.inAsync = this.inPropertyName = this.inType = this.inClassProperty = this.noAnonFunctionType = this.hasFlowComment = this.isIterator = false;
 
     this.classLevel = 0;
 
@@ -102,6 +102,8 @@ export default class State {
   noAnonFunctionType: boolean;
   inPropertyName: boolean;
   inClassProperty: boolean;
+  hasFlowComment: boolean;
+  isIterator: boolean;
 
   // Check whether we are in a (nested) class or not.
   classLevel: number;
diff --git a/packages/babylon/src/types.js b/packages/babylon/src/types.js
index 201c4f35c7187..41d457d7f137e 100644
--- a/packages/babylon/src/types.js
+++ b/packages/babylon/src/types.js
@@ -326,6 +326,9 @@ export type VariableDeclarator = NodeBase & {
   type: "VariableDeclarator",
   id: Pattern,
   init: ?Expression,
+
+  // TypeScript only:
+  definite?: true,
 };
 
 // Misc
@@ -696,6 +699,7 @@ export type ClassProperty = ClassMemberBase & {
 
   // TypeScript only: (TODO: Not in spec)
   readonly?: true,
+  definite?: true,
 };
 
 export type ClassPrivateProperty = NodeBase & {
@@ -937,6 +941,18 @@ export type EstreeProperty = NodeBase & {
   variance?: ?FlowVariance,
 };
 
+export type EstreeMethodDefinition = NodeBase & {
+  type: "MethodDefinition",
+  static: boolean,
+  key: Expression,
+  computed: boolean,
+  value: Expression,
+  decorators: $ReadOnlyArray<Decorator>,
+  kind?: "get" | "set" | "method",
+
+  variance?: ?FlowVariance,
+};
+
 // === === === ===
 // TypeScript
 // === === === ===
@@ -1064,6 +1080,8 @@ export type TsType =
   | TsArrayType
   | TsTupleType
   | TsUnionOrIntersectionType
+  | TsConditionalType
+  | TsInferType
   | TsParenthesizedType
   | TsTypeOperator
   | TsIndexedAccessType
@@ -1154,6 +1172,19 @@ export type TsIntersectionType = TsUnionOrIntersectionTypeBase & {
   type: "TSIntersectionType",
 };
 
+export type TsConditionalType = TsTypeBase & {
+  type: "TSConditionalType",
+  checkType: TsType,
+  extendsType: TsType,
+  trueType: TsType,
+  falseType: TsType,
+};
+
+export type TsInferType = TsTypeBase & {
+  type: "TSInferType",
+  typeParameter: TypeParameter,
+};
+
 export type TsParenthesizedType = TsTypeBase & {
   type: "TSParenthesizedType",
   typeAnnotation: TsType,
@@ -1298,3 +1329,12 @@ export type TsNonNullExpression = NodeBase & {
   type: "TSNonNullExpression",
   expression: Expression,
 };
+
+// ================
+// Other
+// ================
+
+export type ParseSubscriptState = {
+  optionalChainMember: boolean,
+  stop: boolean,
+};
diff --git a/packages/babylon/test/fixtures/core/sourcetype-unambiguous/import-meta/input.js b/packages/babylon/test/fixtures/core/sourcetype-unambiguous/import-meta/input.js
new file mode 100644
index 0000000000000..e7313a090ffe5
--- /dev/null
+++ b/packages/babylon/test/fixtures/core/sourcetype-unambiguous/import-meta/input.js
@@ -0,0 +1 @@
+console.log(import.meta);
diff --git a/packages/babylon/test/fixtures/core/sourcetype-unambiguous/import-meta/options.json b/packages/babylon/test/fixtures/core/sourcetype-unambiguous/import-meta/options.json
new file mode 100644
index 0000000000000..6fdc0a23b66ec
--- /dev/null
+++ b/packages/babylon/test/fixtures/core/sourcetype-unambiguous/import-meta/options.json
@@ -0,0 +1,4 @@
+{
+  "sourceType": "unambiguous",
+  "plugins": ["importMeta"]
+}
diff --git a/packages/babylon/test/fixtures/core/sourcetype-unambiguous/import-meta/output.json b/packages/babylon/test/fixtures/core/sourcetype-unambiguous/import-meta/output.json
new file mode 100644
index 0000000000000..1fe4795f6400c
--- /dev/null
+++ b/packages/babylon/test/fixtures/core/sourcetype-unambiguous/import-meta/output.json
@@ -0,0 +1,165 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 25,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 25
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 25,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 25
+      }
+    },
+    "sourceType": "module",
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start": 0,
+        "end": 25,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 25
+          }
+        },
+        "expression": {
+          "type": "CallExpression",
+          "start": 0,
+          "end": 24,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 0
+            },
+            "end": {
+              "line": 1,
+              "column": 24
+            }
+          },
+          "callee": {
+            "type": "MemberExpression",
+            "start": 0,
+            "end": 11,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 0
+              },
+              "end": {
+                "line": 1,
+                "column": 11
+              }
+            },
+            "object": {
+              "type": "Identifier",
+              "start": 0,
+              "end": 7,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 0
+                },
+                "end": {
+                  "line": 1,
+                  "column": 7
+                },
+                "identifierName": "console"
+              },
+              "name": "console"
+            },
+            "property": {
+              "type": "Identifier",
+              "start": 8,
+              "end": 11,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 8
+                },
+                "end": {
+                  "line": 1,
+                  "column": 11
+                },
+                "identifierName": "log"
+              },
+              "name": "log"
+            },
+            "computed": false
+          },
+          "arguments": [
+            {
+              "type": "MetaProperty",
+              "start": 12,
+              "end": 23,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 12
+                },
+                "end": {
+                  "line": 1,
+                  "column": 23
+                }
+              },
+              "meta": {
+                "type": "Identifier",
+                "start": 12,
+                "end": 18,
+                "loc": {
+                  "start": {
+                    "line": 1,
+                    "column": 12
+                  },
+                  "end": {
+                    "line": 1,
+                    "column": 18
+                  },
+                  "identifierName": "import"
+                },
+                "name": "import"
+              },
+              "property": {
+                "type": "Identifier",
+                "start": 19,
+                "end": 23,
+                "loc": {
+                  "start": {
+                    "line": 1,
+                    "column": 19
+                  },
+                  "end": {
+                    "line": 1,
+                    "column": 23
+                  },
+                  "identifierName": "meta"
+                },
+                "name": "meta"
+              }
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/class-methods/getter-signature/options.json b/packages/babylon/test/fixtures/es2015/class-methods/getter-signature/options.json
index 9699409e829a5..e096100dcfd64 100644
--- a/packages/babylon/test/fixtures/es2015/class-methods/getter-signature/options.json
+++ b/packages/babylon/test/fixtures/es2015/class-methods/getter-signature/options.json
@@ -1,3 +1,3 @@
 {
-  "throws": "getter should have no params (2:2)"
+  "throws": "getter must not have any formal parameters (2:2)"
 }
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/bare-initializer/input.js b/packages/babylon/test/fixtures/es2015/for-in/bare-initializer/input.js
new file mode 100644
index 0000000000000..094f22863b559
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/bare-initializer/input.js
@@ -0,0 +1,2 @@
+var a;
+for (a = 0 in {});
diff --git a/packages/babylon/test/fixtures/es2015/for-in/bare-initializer/output.json b/packages/babylon/test/fixtures/es2015/for-in/bare-initializer/output.json
new file mode 100644
index 0000000000000..b205c87f55d43
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/bare-initializer/output.json
@@ -0,0 +1,183 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 25,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 2,
+      "column": 18
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 25,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 2,
+        "column": 18
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "VariableDeclaration",
+        "start": 0,
+        "end": 6,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 6
+          }
+        },
+        "declarations": [
+          {
+            "type": "VariableDeclarator",
+            "start": 4,
+            "end": 5,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 4
+              },
+              "end": {
+                "line": 1,
+                "column": 5
+              }
+            },
+            "id": {
+              "type": "Identifier",
+              "start": 4,
+              "end": 5,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 4
+                },
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+      },
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+            "line": 2,
+            "column": 0
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+          "loc": {
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+              "column": 14
+            },
+            "end": {
+              "line": 2,
+              "column": 16
+            }
+          },
+          "properties": []
+        },
+        "body": {
+          "type": "EmptyStatement",
+          "start": 24,
+          "end": 25,
+          "loc": {
+            "start": {
+              "line": 2,
+              "column": 17
+            },
+            "end": {
+              "line": 2,
+              "column": 18
+            }
+          }
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/const-initializer/input.js b/packages/babylon/test/fixtures/es2015/for-in/const-initializer/input.js
new file mode 100644
index 0000000000000..aa7bc09da8a2e
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/const-initializer/input.js
@@ -0,0 +1 @@
+for (const a = 0 in {});
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/const-initializer/options.json b/packages/babylon/test/fixtures/es2015/for-in/const-initializer/options.json
new file mode 100644
index 0000000000000..a7c6e79257b97
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/const-initializer/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token, expected \";\" (1:17)"
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/let-initializer/input.js b/packages/babylon/test/fixtures/es2015/for-in/let-initializer/input.js
new file mode 100644
index 0000000000000..037f0d340379b
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/let-initializer/input.js
@@ -0,0 +1 @@
+for (let a = 0 in {});
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/let-initializer/options.json b/packages/babylon/test/fixtures/es2015/for-in/let-initializer/options.json
new file mode 100644
index 0000000000000..bc625e0d0c48c
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/let-initializer/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token, expected \";\" (1:15)"
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/nonstrict-initializer/input.js b/packages/babylon/test/fixtures/es2015/for-in/nonstrict-initializer/input.js
new file mode 100644
index 0000000000000..c2b56cda957ff
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/nonstrict-initializer/input.js
@@ -0,0 +1,6 @@
+  var effects = 0;
+  var iterations = 0;
+  var stored;
+  for (var a = (++effects, -1) in stored = a, {a: 0, b: 1, c: 2}) {
+    ++iterations;
+  }
diff --git a/packages/babylon/test/fixtures/es2015/for-in/nonstrict-initializer/output.json b/packages/babylon/test/fixtures/es2015/for-in/nonstrict-initializer/output.json
new file mode 100644
index 0000000000000..4e0e704c3706e
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/nonstrict-initializer/output.json
@@ -0,0 +1,707 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 144,
+  "loc": {
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+      "column": 3
+    }
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+    "type": "Program",
+    "start": 0,
+    "end": 144,
+    "loc": {
+      "start": {
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+        "column": 0
+      },
+      "end": {
+        "line": 6,
+        "column": 3
+      }
+    },
+    "sourceType": "script",
+    "body": [
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+        "start": 2,
+        "end": 18,
+        "loc": {
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+            "column": 18
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+            "end": 17,
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+                "column": 6
+              },
+              "end": {
+                "line": 1,
+                "column": 17
+              }
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+              "end": 13,
+              "loc": {
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+                }
+              },
+              "extra": {
+                "rawValue": 0,
+                "raw": "0"
+              },
+              "value": 0
+            }
+          }
+        ],
+        "kind": "var"
+      },
+      {
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+                "raw": "0"
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+            }
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+                  },
+                  "end": {
+                    "line": 5,
+                    "column": 16
+                  }
+                },
+                "operator": "++",
+                "prefix": true,
+                "argument": {
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+                    },
+                    "identifierName": "iterations"
+                  },
+                  "name": "iterations"
+                },
+                "extra": {
+                  "parenthesizedArgument": false
+                }
+              }
+            }
+          ],
+          "directives": []
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/strict-initializer/input.js b/packages/babylon/test/fixtures/es2015/for-in/strict-initializer/input.js
new file mode 100644
index 0000000000000..c1ecfdf85c803
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/strict-initializer/input.js
@@ -0,0 +1,2 @@
+'use strict';
+for (var a = 0 in {});
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/strict-initializer/options.json b/packages/babylon/test/fixtures/es2015/for-in/strict-initializer/options.json
new file mode 100644
index 0000000000000..983e17a01e63f
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/strict-initializer/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "for-in initializer in strict mode (2:15)"
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/var-arraybindingpattern-initializer/input.js b/packages/babylon/test/fixtures/es2015/for-in/var-arraybindingpattern-initializer/input.js
new file mode 100644
index 0000000000000..54b71b26a4223
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/var-arraybindingpattern-initializer/input.js
@@ -0,0 +1 @@
+for (var [a] = 0 in {});
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/var-arraybindingpattern-initializer/options.json b/packages/babylon/test/fixtures/es2015/for-in/var-arraybindingpattern-initializer/options.json
new file mode 100644
index 0000000000000..a7c6e79257b97
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/var-arraybindingpattern-initializer/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token, expected \";\" (1:17)"
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/var-objectbindingpattern-initializer/input.js b/packages/babylon/test/fixtures/es2015/for-in/var-objectbindingpattern-initializer/input.js
new file mode 100644
index 0000000000000..f0708b2348324
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/var-objectbindingpattern-initializer/input.js
@@ -0,0 +1 @@
+for (var {a} = 0 in {});
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/for-in/var-objectbindingpattern-initializer/options.json b/packages/babylon/test/fixtures/es2015/for-in/var-objectbindingpattern-initializer/options.json
new file mode 100644
index 0000000000000..a7c6e79257b97
--- /dev/null
+++ b/packages/babylon/test/fixtures/es2015/for-in/var-objectbindingpattern-initializer/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token, expected \";\" (1:17)"
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/es2015/uncategorised/347/options.json b/packages/babylon/test/fixtures/es2015/uncategorised/347/options.json
index 739bda889b8ab..9a137564eed4e 100644
--- a/packages/babylon/test/fixtures/es2015/uncategorised/347/options.json
+++ b/packages/babylon/test/fixtures/es2015/uncategorised/347/options.json
@@ -1,3 +1,3 @@
 {
-  "throws": "setter should have exactly one param (1:10)"
+  "throws": "setter must have exactly one formal parameter (1:10)"
 }
diff --git a/packages/babylon/test/fixtures/esprima/rest-parameter/invalid-setter-rest/options.json b/packages/babylon/test/fixtures/esprima/rest-parameter/invalid-setter-rest/options.json
new file mode 100644
index 0000000000000..c397e398c82b9
--- /dev/null
+++ b/packages/babylon/test/fixtures/esprima/rest-parameter/invalid-setter-rest/options.json
@@ -0,0 +1,3 @@
+{
+    "throws": "setter function argument must not be a rest parameter (1:6)"
+  }
diff --git a/packages/babylon/test/fixtures/esprima/rest-parameter/invalid-setter-rest/output.json b/packages/babylon/test/fixtures/esprima/rest-parameter/invalid-setter-rest/output.json
deleted file mode 100644
index 8d4bed2eb18c4..0000000000000
--- a/packages/babylon/test/fixtures/esprima/rest-parameter/invalid-setter-rest/output.json
+++ /dev/null
@@ -1,188 +0,0 @@
-{
-  "type": "File",
-  "start": 0,
-  "end": 22,
-  "loc": {
-    "start": {
-      "line": 1,
-      "column": 0
-    },
-    "end": {
-      "line": 1,
-      "column": 22
-    }
-  },
-  "program": {
-    "type": "Program",
-    "start": 0,
-    "end": 22,
-    "loc": {
-      "start": {
-        "line": 1,
-        "column": 0
-      },
-      "end": {
-        "line": 1,
-        "column": 22
-      }
-    },
-    "sourceType": "script",
-    "body": [
-      {
-        "type": "ExpressionStatement",
-        "start": 0,
-        "end": 22,
-        "loc": {
-          "start": {
-            "line": 1,
-            "column": 0
-          },
-          "end": {
-            "line": 1,
-            "column": 22
-          }
-        },
-        "expression": {
-          "type": "AssignmentExpression",
-          "start": 0,
-          "end": 22,
-          "loc": {
-            "start": {
-              "line": 1,
-              "column": 0
-            },
-            "end": {
-              "line": 1,
-              "column": 22
-            }
-          },
-          "operator": "=",
-          "left": {
-            "type": "Identifier",
-            "start": 0,
-            "end": 1,
-            "loc": {
-              "start": {
-                "line": 1,
-                "column": 0
-              },
-              "end": {
-                "line": 1,
-                "column": 1
-              },
-              "identifierName": "x"
-            },
-            "name": "x"
-          },
-          "right": {
-            "type": "ObjectExpression",
-            "start": 4,
-            "end": 22,
-            "loc": {
-              "start": {
-                "line": 1,
-                "column": 4
-              },
-              "end": {
-                "line": 1,
-                "column": 22
-              }
-            },
-            "properties": [
-              {
-                "type": "ObjectMethod",
-                "start": 6,
-                "end": 20,
-                "loc": {
-                  "start": {
-                    "line": 1,
-                    "column": 6
-                  },
-                  "end": {
-                    "line": 1,
-                    "column": 20
-                  }
-                },
-                "method": false,
-                "key": {
-                  "type": "Identifier",
-                  "start": 10,
-                  "end": 11,
-                  "loc": {
-                    "start": {
-                      "line": 1,
-                      "column": 10
-                    },
-                    "end": {
-                      "line": 1,
-                      "column": 11
-                    },
-                    "identifierName": "f"
-                  },
-                  "name": "f"
-                },
-                "computed": false,
-                "kind": "set",
-                "id": null,
-                "generator": false,
-                "async": false,
-                "params": [
-                  {
-                    "type": "RestElement",
-                    "start": 12,
-                    "end": 16,
-                    "loc": {
-                      "start": {
-                        "line": 1,
-                        "column": 12
-                      },
-                      "end": {
-                        "line": 1,
-                        "column": 16
-                      }
-                    },
-                    "argument": {
-                      "type": "Identifier",
-                      "start": 15,
-                      "end": 16,
-                      "loc": {
-                        "start": {
-                          "line": 1,
-                          "column": 15
-                        },
-                        "end": {
-                          "line": 1,
-                          "column": 16
-                        },
-                        "identifierName": "y"
-                      },
-                      "name": "y"
-                    }
-                  }
-                ],
-                "body": {
-                  "type": "BlockStatement",
-                  "start": 18,
-                  "end": 20,
-                  "loc": {
-                    "start": {
-                      "line": 1,
-                      "column": 18
-                    },
-                    "end": {
-                      "line": 1,
-                      "column": 20
-                    }
-                  },
-                  "body": [],
-                  "directives": []
-                }
-              }
-            ]
-          }
-        }
-      }
-    ],
-    "directives": []
-  }
-}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals-no-plugin/input.js b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals-no-plugin/input.js
new file mode 100644
index 0000000000000..740f1fa9268a3
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals-no-plugin/input.js
@@ -0,0 +1,2 @@
+a &&= b;
+obj.a &&= b;
diff --git a/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals-no-plugin/options.json b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals-no-plugin/options.json
new file mode 100644
index 0000000000000..5b674fdee42e7
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals-no-plugin/options.json
@@ -0,0 +1,4 @@
+{
+  "plugins": [],
+  "throws": "This experimental syntax requires enabling the parser plugin: 'logicalAssignment' (1:2)"
+}
diff --git a/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals/input.js b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals/input.js
new file mode 100644
index 0000000000000..740f1fa9268a3
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals/input.js
@@ -0,0 +1,2 @@
+a &&= b;
+obj.a &&= b;
diff --git a/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals/options.json b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals/options.json
new file mode 100644
index 0000000000000..5041dbb19f815
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["logicalAssignment"]
+}
diff --git a/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals/output.json b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals/output.json
new file mode 100644
index 0000000000000..a8cf00f410427
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/and-and-equals/output.json
@@ -0,0 +1,197 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 21,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 2,
+      "column": 12
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 21,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 2,
+        "column": 12
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start": 0,
+        "end": 8,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 8
+          }
+        },
+        "expression": {
+          "type": "AssignmentExpression",
+          "start": 0,
+          "end": 7,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 0
+            },
+            "end": {
+              "line": 1,
+              "column": 7
+            }
+          },
+          "operator": "&&=",
+          "left": {
+            "type": "Identifier",
+            "start": 0,
+            "end": 1,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 0
+              },
+              "end": {
+                "line": 1,
+                "column": 1
+              },
+              "identifierName": "a"
+            },
+            "name": "a"
+          },
+          "right": {
+            "type": "Identifier",
+            "start": 6,
+            "end": 7,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 6
+              },
+              "end": {
+                "line": 1,
+                "column": 7
+              },
+              "identifierName": "b"
+            },
+            "name": "b"
+          }
+        }
+      },
+      {
+        "type": "ExpressionStatement",
+        "start": 9,
+        "end": 21,
+        "loc": {
+          "start": {
+            "line": 2,
+            "column": 0
+          },
+          "end": {
+            "line": 2,
+            "column": 12
+          }
+        },
+        "expression": {
+          "type": "AssignmentExpression",
+          "start": 9,
+          "end": 20,
+          "loc": {
+            "start": {
+              "line": 2,
+              "column": 0
+            },
+            "end": {
+              "line": 2,
+              "column": 11
+            }
+          },
+          "operator": "&&=",
+          "left": {
+            "type": "MemberExpression",
+            "start": 9,
+            "end": 14,
+            "loc": {
+              "start": {
+                "line": 2,
+                "column": 0
+              },
+              "end": {
+                "line": 2,
+                "column": 5
+              }
+            },
+            "object": {
+              "type": "Identifier",
+              "start": 9,
+              "end": 12,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 0
+                },
+                "end": {
+                  "line": 2,
+                  "column": 3
+                },
+                "identifierName": "obj"
+              },
+              "name": "obj"
+            },
+            "property": {
+              "type": "Identifier",
+              "start": 13,
+              "end": 14,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 4
+                },
+                "end": {
+                  "line": 2,
+                  "column": 5
+                },
+                "identifierName": "a"
+              },
+              "name": "a"
+            },
+            "computed": false
+          },
+          "right": {
+            "type": "Identifier",
+            "start": 19,
+            "end": 20,
+            "loc": {
+              "start": {
+                "line": 2,
+                "column": 10
+              },
+              "end": {
+                "line": 2,
+                "column": 11
+              },
+              "identifierName": "b"
+            },
+            "name": "b"
+          }
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet-no-plugin/input.js b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet-no-plugin/input.js
new file mode 100644
index 0000000000000..53c87792bb2fc
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet-no-plugin/input.js
@@ -0,0 +1 @@
+a ||= b;
diff --git a/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet-no-plugin/options.json b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet-no-plugin/options.json
new file mode 100644
index 0000000000000..5b674fdee42e7
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet-no-plugin/options.json
@@ -0,0 +1,4 @@
+{
+  "plugins": [],
+  "throws": "This experimental syntax requires enabling the parser plugin: 'logicalAssignment' (1:2)"
+}
diff --git a/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet/input.js b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet/input.js
new file mode 100644
index 0000000000000..cb4961f49b9e6
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet/input.js
@@ -0,0 +1,2 @@
+a ||= b;
+obj.a ||= b;
diff --git a/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet/options.json b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet/options.json
new file mode 100644
index 0000000000000..5041dbb19f815
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet/options.json
@@ -0,0 +1,3 @@
+{
+  "plugins": ["logicalAssignment"]
+}
diff --git a/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet/output.json b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet/output.json
new file mode 100644
index 0000000000000..857dd9538eb58
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/logical-assignment-operator/mallet/output.json
@@ -0,0 +1,197 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 21,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 2,
+      "column": 12
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 21,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 2,
+        "column": 12
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start": 0,
+        "end": 8,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 8
+          }
+        },
+        "expression": {
+          "type": "AssignmentExpression",
+          "start": 0,
+          "end": 7,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 0
+            },
+            "end": {
+              "line": 1,
+              "column": 7
+            }
+          },
+          "operator": "||=",
+          "left": {
+            "type": "Identifier",
+            "start": 0,
+            "end": 1,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 0
+              },
+              "end": {
+                "line": 1,
+                "column": 1
+              },
+              "identifierName": "a"
+            },
+            "name": "a"
+          },
+          "right": {
+            "type": "Identifier",
+            "start": 6,
+            "end": 7,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 6
+              },
+              "end": {
+                "line": 1,
+                "column": 7
+              },
+              "identifierName": "b"
+            },
+            "name": "b"
+          }
+        }
+      },
+      {
+        "type": "ExpressionStatement",
+        "start": 9,
+        "end": 21,
+        "loc": {
+          "start": {
+            "line": 2,
+            "column": 0
+          },
+          "end": {
+            "line": 2,
+            "column": 12
+          }
+        },
+        "expression": {
+          "type": "AssignmentExpression",
+          "start": 9,
+          "end": 20,
+          "loc": {
+            "start": {
+              "line": 2,
+              "column": 0
+            },
+            "end": {
+              "line": 2,
+              "column": 11
+            }
+          },
+          "operator": "||=",
+          "left": {
+            "type": "MemberExpression",
+            "start": 9,
+            "end": 14,
+            "loc": {
+              "start": {
+                "line": 2,
+                "column": 0
+              },
+              "end": {
+                "line": 2,
+                "column": 5
+              }
+            },
+            "object": {
+              "type": "Identifier",
+              "start": 9,
+              "end": 12,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 0
+                },
+                "end": {
+                  "line": 2,
+                  "column": 3
+                },
+                "identifierName": "obj"
+              },
+              "name": "obj"
+            },
+            "property": {
+              "type": "Identifier",
+              "start": 13,
+              "end": 14,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 4
+                },
+                "end": {
+                  "line": 2,
+                  "column": 5
+                },
+                "identifierName": "a"
+              },
+              "name": "a"
+            },
+            "computed": false
+          },
+          "right": {
+            "type": "Identifier",
+            "start": 19,
+            "end": 20,
+            "loc": {
+              "start": {
+                "line": 2,
+                "column": 10
+              },
+              "end": {
+                "line": 2,
+                "column": 11
+              },
+              "identifierName": "b"
+            },
+            "name": "b"
+          }
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property-class/input.js b/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property-class/input.js
new file mode 100644
index 0000000000000..7af8cadabc117
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property-class/input.js
@@ -0,0 +1,5 @@
+class A{
+    b(){
+        return super?.b;
+    }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property-class/options.json b/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property-class/options.json
new file mode 100644
index 0000000000000..0bbb2f11bae6e
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property-class/options.json
@@ -0,0 +1,4 @@
+{
+    "plugins":["optionalChaining"],
+    "throws": "Unexpected token (3:20)"
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property/input.js b/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property/input.js
new file mode 100644
index 0000000000000..dafc54712f081
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property/input.js
@@ -0,0 +1,5 @@
+const a = {
+    b(){
+        return super?.c;
+    }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property/options.json b/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property/options.json
new file mode 100644
index 0000000000000..0bbb2f11bae6e
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/optional-chaining/optional-super-property/options.json
@@ -0,0 +1,4 @@
+{
+    "plugins":["optionalChaining"],
+    "throws": "Unexpected token (3:20)"
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/experimental/optional-chaining/super-method-class/input.js b/packages/babylon/test/fixtures/experimental/optional-chaining/super-method-class/input.js
new file mode 100644
index 0000000000000..31dcb716ca789
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/optional-chaining/super-method-class/input.js
@@ -0,0 +1,5 @@
+class A{
+    constructor(){
+        super()?.b;
+    }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/experimental/optional-chaining/super-method-class/options.json b/packages/babylon/test/fixtures/experimental/optional-chaining/super-method-class/options.json
new file mode 100644
index 0000000000000..1655838858132
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/optional-chaining/super-method-class/options.json
@@ -0,0 +1,3 @@
+{
+    "plugins":["optionalChaining"]
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/experimental/optional-chaining/super-method-class/output.json b/packages/babylon/test/fixtures/experimental/optional-chaining/super-method-class/output.json
new file mode 100644
index 0000000000000..b6c5a510c4ad2
--- /dev/null
+++ b/packages/babylon/test/fixtures/experimental/optional-chaining/super-method-class/output.json
@@ -0,0 +1,221 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 55,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 5,
+      "column": 1
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 55,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 5,
+        "column": 1
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "ClassDeclaration",
+        "start": 0,
+        "end": 55,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 5,
+            "column": 1
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 6,
+          "end": 7,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 6
+            },
+            "end": {
+              "line": 1,
+              "column": 7
+            },
+            "identifierName": "A"
+          },
+          "name": "A"
+        },
+        "superClass": null,
+        "body": {
+          "type": "ClassBody",
+          "start": 7,
+          "end": 55,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 7
+            },
+            "end": {
+              "line": 5,
+              "column": 1
+            }
+          },
+          "body": [
+            {
+              "type": "ClassMethod",
+              "start": 13,
+              "end": 53,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 4
+                },
+                "end": {
+                  "line": 4,
+                  "column": 5
+                }
+              },
+              "static": false,
+              "key": {
+                "type": "Identifier",
+                "start": 13,
+                "end": 24,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 4
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 15
+                  },
+                  "identifierName": "constructor"
+                },
+                "name": "constructor"
+              },
+              "computed": false,
+              "kind": "constructor",
+              "id": null,
+              "generator": false,
+              "async": false,
+              "params": [],
+              "body": {
+                "type": "BlockStatement",
+                "start": 26,
+                "end": 53,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 17
+                  },
+                  "end": {
+                    "line": 4,
+                    "column": 5
+                  }
+                },
+                "body": [
+                  {
+                    "type": "ExpressionStatement",
+                    "start": 36,
+                    "end": 47,
+                    "loc": {
+                      "start": {
+                        "line": 3,
+                        "column": 8
+                      },
+                      "end": {
+                        "line": 3,
+                        "column": 19
+                      }
+                    },
+                    "expression": {
+                      "type": "OptionalMemberExpression",
+                      "start": 36,
+                      "end": 46,
+                      "loc": {
+                        "start": {
+                          "line": 3,
+                          "column": 8
+                        },
+                        "end": {
+                          "line": 3,
+                          "column": 18
+                        }
+                      },
+                      "object": {
+                        "type": "CallExpression",
+                        "start": 36,
+                        "end": 43,
+                        "loc": {
+                          "start": {
+                            "line": 3,
+                            "column": 8
+                          },
+                          "end": {
+                            "line": 3,
+                            "column": 15
+                          }
+                        },
+                        "callee": {
+                          "type": "Super",
+                          "start": 36,
+                          "end": 41,
+                          "loc": {
+                            "start": {
+                              "line": 3,
+                              "column": 8
+                            },
+                            "end": {
+                              "line": 3,
+                              "column": 13
+                            }
+                          }
+                        },
+                        "arguments": []
+                      },
+                      "property": {
+                        "type": "Identifier",
+                        "start": 45,
+                        "end": 46,
+                        "loc": {
+                          "start": {
+                            "line": 3,
+                            "column": 17
+                          },
+                          "end": {
+                            "line": 3,
+                            "column": 18
+                          },
+                          "identifierName": "b"
+                        },
+                        "name": "b"
+                      },
+                      "computed": false,
+                      "optional": true
+                    }
+                  }
+                ],
+                "directives": []
+              }
+            }
+          ]
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/flow/object-types/invalid-getter-param-count-rest/input.js b/packages/babylon/test/fixtures/flow/object-types/invalid-getter-param-count-rest/input.js
new file mode 100644
index 0000000000000..a93bcb11c209c
--- /dev/null
+++ b/packages/babylon/test/fixtures/flow/object-types/invalid-getter-param-count-rest/input.js
@@ -0,0 +1,3 @@
+type B = {
+  get a(...foo): number;
+}
diff --git a/packages/babylon/test/fixtures/flow/object-types/invalid-getter-param-count-rest/options.json b/packages/babylon/test/fixtures/flow/object-types/invalid-getter-param-count-rest/options.json
new file mode 100644
index 0000000000000..65bc24a66fcdb
--- /dev/null
+++ b/packages/babylon/test/fixtures/flow/object-types/invalid-getter-param-count-rest/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "getter must not have any formal parameters (2:2)"
+}
diff --git a/packages/babylon/test/fixtures/flow/object-types/invalid-getter-param-count/options.json b/packages/babylon/test/fixtures/flow/object-types/invalid-getter-param-count/options.json
index 8694117aee685..65bc24a66fcdb 100644
--- a/packages/babylon/test/fixtures/flow/object-types/invalid-getter-param-count/options.json
+++ b/packages/babylon/test/fixtures/flow/object-types/invalid-getter-param-count/options.json
@@ -1,3 +1,3 @@
 {
-  "throws": "getter should have no params (2:2)"
+  "throws": "getter must not have any formal parameters (2:2)"
 }
diff --git a/packages/babylon/test/fixtures/flow/object-types/invalid-setter-param-count/options.json b/packages/babylon/test/fixtures/flow/object-types/invalid-setter-param-count/options.json
index 8ea95ab8887d0..6a15677822025 100644
--- a/packages/babylon/test/fixtures/flow/object-types/invalid-setter-param-count/options.json
+++ b/packages/babylon/test/fixtures/flow/object-types/invalid-setter-param-count/options.json
@@ -1,3 +1,3 @@
 {
-  "throws": "setter should have exactly one param (2:2)"
+  "throws": "setter must have exactly one formal parameter (2:2)"
 }
diff --git a/packages/babylon/test/fixtures/flow/object-types/invalid-setter-param-type/input.js b/packages/babylon/test/fixtures/flow/object-types/invalid-setter-param-type/input.js
new file mode 100644
index 0000000000000..169d54941f64e
--- /dev/null
+++ b/packages/babylon/test/fixtures/flow/object-types/invalid-setter-param-type/input.js
@@ -0,0 +1,3 @@
+type B = {
+  set a(...w): void;
+}
diff --git a/packages/babylon/test/fixtures/flow/object-types/invalid-setter-param-type/options.json b/packages/babylon/test/fixtures/flow/object-types/invalid-setter-param-type/options.json
new file mode 100644
index 0000000000000..15ce6a4c5a51f
--- /dev/null
+++ b/packages/babylon/test/fixtures/flow/object-types/invalid-setter-param-type/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "setter function argument must not be a rest parameter (2:2)"
+}
diff --git a/packages/babylon/test/fixtures/typescript/class/properties/input.js b/packages/babylon/test/fixtures/typescript/class/properties/input.js
index 8c0ad68965879..51413533ae042 100644
--- a/packages/babylon/test/fixtures/typescript/class/properties/input.js
+++ b/packages/babylon/test/fixtures/typescript/class/properties/input.js
@@ -3,4 +3,6 @@ class C {
     x?;
     x: number;
     x: number = 1;
+    x!;
+    x!: number;
 }
diff --git a/packages/babylon/test/fixtures/typescript/class/properties/output.json b/packages/babylon/test/fixtures/typescript/class/properties/output.json
index edbf544f70e6c..90e0d7df2267b 100644
--- a/packages/babylon/test/fixtures/typescript/class/properties/output.json
+++ b/packages/babylon/test/fixtures/typescript/class/properties/output.json
@@ -1,28 +1,28 @@
 {
   "type": "File",
   "start": 0,
-  "end": 60,
+  "end": 84,
   "loc": {
     "start": {
       "line": 1,
       "column": 0
     },
     "end": {
-      "line": 6,
+      "line": 8,
       "column": 1
     }
   },
   "program": {
     "type": "Program",
     "start": 0,
-    "end": 60,
+    "end": 84,
     "loc": {
       "start": {
         "line": 1,
         "column": 0
       },
       "end": {
-        "line": 6,
+        "line": 8,
         "column": 1
       }
     },
@@ -31,14 +31,14 @@
       {
         "type": "ClassDeclaration",
         "start": 0,
-        "end": 60,
+        "end": 84,
         "loc": {
           "start": {
             "line": 1,
             "column": 0
           },
           "end": {
-            "line": 6,
+            "line": 8,
             "column": 1
           }
         },
@@ -63,14 +63,14 @@
         "body": {
           "type": "ClassBody",
           "start": 8,
-          "end": 60,
+          "end": 84,
           "loc": {
             "start": {
               "line": 1,
               "column": 8
             },
             "end": {
-              "line": 6,
+              "line": 8,
               "column": 1
             }
           },
@@ -294,6 +294,108 @@
                 },
                 "value": 1
               }
+            },
+            {
+              "type": "ClassProperty",
+              "start": 63,
+              "end": 66,
+              "loc": {
+                "start": {
+                  "line": 6,
+                  "column": 4
+                },
+                "end": {
+                  "line": 6,
+                  "column": 7
+                }
+              },
+              "static": false,
+              "key": {
+                "type": "Identifier",
+                "start": 63,
+                "end": 64,
+                "loc": {
+                  "start": {
+                    "line": 6,
+                    "column": 4
+                  },
+                  "end": {
+                    "line": 6,
+                    "column": 5
+                  },
+                  "identifierName": "x"
+                },
+                "name": "x"
+              },
+              "computed": false,
+              "definite": true,
+              "value": null
+            },
+            {
+              "type": "ClassProperty",
+              "start": 71,
+              "end": 82,
+              "loc": {
+                "start": {
+                  "line": 7,
+                  "column": 4
+                },
+                "end": {
+                  "line": 7,
+                  "column": 15
+                }
+              },
+              "static": false,
+              "key": {
+                "type": "Identifier",
+                "start": 71,
+                "end": 72,
+                "loc": {
+                  "start": {
+                    "line": 7,
+                    "column": 4
+                  },
+                  "end": {
+                    "line": 7,
+                    "column": 5
+                  },
+                  "identifierName": "x"
+                },
+                "name": "x"
+              },
+              "computed": false,
+              "definite": true,
+              "typeAnnotation": {
+                "type": "TSTypeAnnotation",
+                "start": 73,
+                "end": 81,
+                "loc": {
+                  "start": {
+                    "line": 7,
+                    "column": 6
+                  },
+                  "end": {
+                    "line": 7,
+                    "column": 14
+                  }
+                },
+                "typeAnnotation": {
+                  "type": "TSNumberKeyword",
+                  "start": 75,
+                  "end": 81,
+                  "loc": {
+                    "start": {
+                      "line": 7,
+                      "column": 8
+                    },
+                    "end": {
+                      "line": 7,
+                      "column": 14
+                    }
+                  }
+                }
+              },
+              "value": null
             }
           ]
         }
diff --git a/packages/babylon/test/fixtures/typescript/class/property-optional-definite-assignment-not-allowed/input.js b/packages/babylon/test/fixtures/typescript/class/property-optional-definite-assignment-not-allowed/input.js
new file mode 100644
index 0000000000000..f649b70d9ca1d
--- /dev/null
+++ b/packages/babylon/test/fixtures/typescript/class/property-optional-definite-assignment-not-allowed/input.js
@@ -0,0 +1,3 @@
+class C {
+  x?!: number;
+}
diff --git a/packages/babylon/test/fixtures/typescript/class/property-optional-definite-assignment-not-allowed/options.json b/packages/babylon/test/fixtures/typescript/class/property-optional-definite-assignment-not-allowed/options.json
new file mode 100644
index 0000000000000..626e94c744f1e
--- /dev/null
+++ b/packages/babylon/test/fixtures/typescript/class/property-optional-definite-assignment-not-allowed/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token, expected \";\" (2:4)"
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/typescript/types/conditional-infer/input.js b/packages/babylon/test/fixtures/typescript/types/conditional-infer/input.js
new file mode 100644
index 0000000000000..fc9bc48546e6a
--- /dev/null
+++ b/packages/babylon/test/fixtures/typescript/types/conditional-infer/input.js
@@ -0,0 +1 @@
+type Element<T> = T extends (infer U)[] ? U : T;
diff --git a/packages/babylon/test/fixtures/typescript/types/conditional-infer/output.json b/packages/babylon/test/fixtures/typescript/types/conditional-infer/output.json
new file mode 100644
index 0000000000000..dd94232cb832f
--- /dev/null
+++ b/packages/babylon/test/fixtures/typescript/types/conditional-infer/output.json
@@ -0,0 +1,271 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 48,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 48
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 48,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 48
+      }
+    },
+    "sourceType": "module",
+    "body": [
+      {
+        "type": "TSTypeAliasDeclaration",
+        "start": 0,
+        "end": 48,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 48
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 5,
+          "end": 12,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 5
+            },
+            "end": {
+              "line": 1,
+              "column": 12
+            },
+            "identifierName": "Element"
+          },
+          "name": "Element"
+        },
+        "typeParameters": {
+          "type": "TSTypeParameterDeclaration",
+          "start": 12,
+          "end": 15,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 12
+            },
+            "end": {
+              "line": 1,
+              "column": 15
+            }
+          },
+          "params": [
+            {
+              "type": "TSTypeParameter",
+              "start": 13,
+              "end": 14,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 13
+                },
+                "end": {
+                  "line": 1,
+                  "column": 14
+                }
+              },
+              "name": "T"
+            }
+          ]
+        },
+        "typeAnnotation": {
+          "type": "TSConditionalType",
+          "start": 18,
+          "end": 47,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 18
+            },
+            "end": {
+              "line": 1,
+              "column": 47
+            }
+          },
+          "checkType": {
+            "type": "TSTypeReference",
+            "start": 18,
+            "end": 19,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 18
+              },
+              "end": {
+                "line": 1,
+                "column": 19
+              }
+            },
+            "typeName": {
+              "type": "Identifier",
+              "start": 18,
+              "end": 19,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 18
+                },
+                "end": {
+                  "line": 1,
+                  "column": 19
+                },
+                "identifierName": "T"
+              },
+              "name": "T"
+            }
+          },
+          "extendsType": {
+            "type": "TSArrayType",
+            "start": 28,
+            "end": 39,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 28
+              },
+              "end": {
+                "line": 1,
+                "column": 39
+              }
+            },
+            "elementType": {
+              "type": "TSParenthesizedType",
+              "start": 28,
+              "end": 37,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 28
+                },
+                "end": {
+                  "line": 1,
+                  "column": 37
+                }
+              },
+              "typeAnnotation": {
+                "type": "TSInferType",
+                "start": 29,
+                "end": 36,
+                "loc": {
+                  "start": {
+                    "line": 1,
+                    "column": 29
+                  },
+                  "end": {
+                    "line": 1,
+                    "column": 36
+                  }
+                },
+                "typeParameter": {
+                  "type": "TypeParameter",
+                  "start": 35,
+                  "end": 36,
+                  "loc": {
+                    "start": {
+                      "line": 1,
+                      "column": 35
+                    },
+                    "end": {
+                      "line": 1,
+                      "column": 36
+                    }
+                  },
+                  "name": "U"
+                }
+              }
+            }
+          },
+          "trueType": {
+            "type": "TSTypeReference",
+            "start": 42,
+            "end": 43,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 42
+              },
+              "end": {
+                "line": 1,
+                "column": 43
+              }
+            },
+            "typeName": {
+              "type": "Identifier",
+              "start": 42,
+              "end": 43,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 42
+                },
+                "end": {
+                  "line": 1,
+                  "column": 43
+                },
+                "identifierName": "U"
+              },
+              "name": "U"
+            }
+          },
+          "falseType": {
+            "type": "TSTypeReference",
+            "start": 46,
+            "end": 47,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 46
+              },
+              "end": {
+                "line": 1,
+                "column": 47
+              }
+            },
+            "typeName": {
+              "type": "Identifier",
+              "start": 46,
+              "end": 47,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 46
+                },
+                "end": {
+                  "line": 1,
+                  "column": 47
+                },
+                "identifierName": "T"
+              },
+              "name": "T"
+            }
+          }
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/typescript/types/conditional/input.js b/packages/babylon/test/fixtures/typescript/types/conditional/input.js
new file mode 100644
index 0000000000000..c776486898189
--- /dev/null
+++ b/packages/babylon/test/fixtures/typescript/types/conditional/input.js
@@ -0,0 +1 @@
+let x: number extends string ? boolean : null;
diff --git a/packages/babylon/test/fixtures/typescript/types/conditional/output.json b/packages/babylon/test/fixtures/typescript/types/conditional/output.json
new file mode 100644
index 0000000000000..d9e73ef0a3649
--- /dev/null
+++ b/packages/babylon/test/fixtures/typescript/types/conditional/output.json
@@ -0,0 +1,175 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 46,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 46
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 46,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 46
+      }
+    },
+    "sourceType": "module",
+    "body": [
+      {
+        "type": "VariableDeclaration",
+        "start": 0,
+        "end": 46,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 46
+          }
+        },
+        "declarations": [
+          {
+            "type": "VariableDeclarator",
+            "start": 4,
+            "end": 45,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 4
+              },
+              "end": {
+                "line": 1,
+                "column": 45
+              }
+            },
+            "id": {
+              "type": "Identifier",
+              "start": 4,
+              "end": 45,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 4
+                },
+                "end": {
+                  "line": 1,
+                  "column": 45
+                },
+                "identifierName": "x"
+              },
+              "name": "x",
+              "typeAnnotation": {
+                "type": "TSTypeAnnotation",
+                "start": 5,
+                "end": 45,
+                "loc": {
+                  "start": {
+                    "line": 1,
+                    "column": 5
+                  },
+                  "end": {
+                    "line": 1,
+                    "column": 45
+                  }
+                },
+                "typeAnnotation": {
+                  "type": "TSConditionalType",
+                  "start": 7,
+                  "end": 45,
+                  "loc": {
+                    "start": {
+                      "line": 1,
+                      "column": 7
+                    },
+                    "end": {
+                      "line": 1,
+                      "column": 45
+                    }
+                  },
+                  "checkType": {
+                    "type": "TSNumberKeyword",
+                    "start": 7,
+                    "end": 13,
+                    "loc": {
+                      "start": {
+                        "line": 1,
+                        "column": 7
+                      },
+                      "end": {
+                        "line": 1,
+                        "column": 13
+                      }
+                    }
+                  },
+                  "extendsType": {
+                    "type": "TSStringKeyword",
+                    "start": 22,
+                    "end": 28,
+                    "loc": {
+                      "start": {
+                        "line": 1,
+                        "column": 22
+                      },
+                      "end": {
+                        "line": 1,
+                        "column": 28
+                      }
+                    }
+                  },
+                  "trueType": {
+                    "type": "TSBooleanKeyword",
+                    "start": 31,
+                    "end": 38,
+                    "loc": {
+                      "start": {
+                        "line": 1,
+                        "column": 31
+                      },
+                      "end": {
+                        "line": 1,
+                        "column": 38
+                      }
+                    }
+                  },
+                  "falseType": {
+                    "type": "TSNullKeyword",
+                    "start": 41,
+                    "end": 45,
+                    "loc": {
+                      "start": {
+                        "line": 1,
+                        "column": 41
+                      },
+                      "end": {
+                        "line": 1,
+                        "column": 45
+                      }
+                    }
+                  }
+                }
+              }
+            },
+            "init": null
+          }
+        ],
+        "kind": "let"
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment-not-allowed/input.js b/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment-not-allowed/input.js
new file mode 100644
index 0000000000000..e91abc1a9d92d
--- /dev/null
+++ b/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment-not-allowed/input.js
@@ -0,0 +1 @@
+let {}! = {};
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment-not-allowed/options.json b/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment-not-allowed/options.json
new file mode 100644
index 0000000000000..8cb567ee77881
--- /dev/null
+++ b/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment-not-allowed/options.json
@@ -0,0 +1,3 @@
+{
+  "throws": "Complex binding patterns require an initialization value (1:6)"
+}
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment/input.js b/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment/input.js
new file mode 100644
index 0000000000000..f27135a2b9f0d
--- /dev/null
+++ b/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment/input.js
@@ -0,0 +1 @@
+let x!: number;
diff --git a/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment/output.json b/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment/output.json
new file mode 100644
index 0000000000000..d47c7ce44ba1e
--- /dev/null
+++ b/packages/babylon/test/fixtures/typescript/variable-declarator/definite-assignment/output.json
@@ -0,0 +1,116 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 15,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 15
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 15,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 15
+      }
+    },
+    "sourceType": "module",
+    "body": [
+      {
+        "type": "VariableDeclaration",
+        "start": 0,
+        "end": 15,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 15
+          }
+        },
+        "declarations": [
+          {
+            "type": "VariableDeclarator",
+            "start": 4,
+            "end": 14,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 4
+              },
+              "end": {
+                "line": 1,
+                "column": 14
+              }
+            },
+            "id": {
+              "type": "Identifier",
+              "start": 4,
+              "end": 14,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 4
+                },
+                "end": {
+                  "line": 1,
+                  "column": 14
+                },
+                "identifierName": "x"
+              },
+              "name": "x",
+              "typeAnnotation": {
+                "type": "TSTypeAnnotation",
+                "start": 6,
+                "end": 14,
+                "loc": {
+                  "start": {
+                    "line": 1,
+                    "column": 6
+                  },
+                  "end": {
+                    "line": 1,
+                    "column": 14
+                  }
+                },
+                "typeAnnotation": {
+                  "type": "TSNumberKeyword",
+                  "start": 8,
+                  "end": 14,
+                  "loc": {
+                    "start": {
+                      "line": 1,
+                      "column": 8
+                    },
+                    "end": {
+                      "line": 1,
+                      "column": 14
+                    }
+                  }
+                }
+              }
+            },
+            "definite": true,
+            "init": null
+          }
+        ],
+        "kind": "let"
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/scripts/_get-test-directories.sh b/scripts/_get-test-directories.sh
deleted file mode 100755
index be33ede24e83c..0000000000000
--- a/scripts/_get-test-directories.sh
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/bin/bash
-set -e
-
-TEST_DIRS=""
-
-sources=("codemods" "packages")
-
-for source in "${sources[@]}"; do
-  for f in $source/*; do
-    if [ -n "$TEST_ONLY" ] && [[ `basename $f` != *"$TEST_ONLY"* ]]; then
-      continue
-    fi
-    # Exclude babel-standalone from coverage runs
-    if [ "$TEST_TYPE" = "cov" ] && [[ `basename $f` = 'babel-standalone' || `basename $f` = 'babel-preset-env-standalone' ]]; then
-      continue
-    fi
-
-    if [ -d "$f/test" ]; then
-      TEST_DIRS="$f/test $TEST_DIRS"
-    fi
-  done
-done
-
-echo $TEST_DIRS
diff --git a/scripts/eslint_rules/no-deprecated-clone.js b/scripts/eslint_rules/no-deprecated-clone.js
new file mode 100644
index 0000000000000..323e5ed2255c6
--- /dev/null
+++ b/scripts/eslint_rules/no-deprecated-clone.js
@@ -0,0 +1,265 @@
+// @flow
+
+"use strict";
+
+function getVariableDefinition(name /*: string */, scope /*: Scope */) {
+  let currentScope = scope;
+  do {
+    const variable = currentScope.set.get(name);
+    if (variable && variable.defs[0]) {
+      return { scope: currentScope, definition: variable.defs[0] };
+    }
+  } while ((currentScope = currentScope.upper));
+}
+
+/*::
+type ReferenceOriginImport = { kind: "import", source: string, name: string };
+type ReferenceOriginParam = {
+  kind: "export param",
+  exportName: string,
+  index: number,
+};
+
+type ReferenceOrigin =
+  | ReferenceOriginImport
+  | ReferenceOriginParam
+  | { kind: "import *", source: string }
+  | {
+      kind: "property",
+      base: ReferenceOriginImport | ReferenceOriginParam,
+      path: string,
+    };
+*/
+
+// Given a node and a context, returns a description of where its value comes
+// from.
+// It resolves imports, parameters of exported functions and property accesses.
+// See the ReferenceOrigin type for more informations.
+function getReferenceOrigin(
+  node /*: Node */,
+  scope /*: Scope */
+) /*: ?ReferenceOrigin */ {
+  if (node.type === "Identifier") {
+    const variable = getVariableDefinition(node.name, scope);
+    if (!variable) return null;
+
+    const definition = variable.definition;
+    const defNode = definition.node;
+
+    if (definition.type === "ImportBinding") {
+      if (defNode.type === "ImportSpecifier") {
+        return {
+          kind: "import",
+          source: definition.parent.source.value,
+          name: defNode.imported.name,
+        };
+      }
+      if (defNode.type === "ImportNamespaceSpecifier") {
+        return {
+          kind: "import *",
+          source: definition.parent.source.value,
+        };
+      }
+    }
+
+    if (definition.type === "Variable" && defNode.init) {
+      const origin = getReferenceOrigin(defNode.init, variable.scope);
+      return origin && patternToProperty(definition.name, origin);
+    }
+
+    if (definition.type === "Parameter") {
+      const parent = defNode.parent;
+      let exportName /*: string */;
+      if (parent.type === "ExportDefaultDeclaration") {
+        exportName = "default";
+      } else if (parent.type === "ExportNamedDeclaration") {
+        exportName = defNode.id.name;
+      } else if (
+        parent.type === "AssignmentExpression" &&
+        parent.left.type === "MemberExpression" &&
+        parent.left.object.type === "Identifier" &&
+        parent.left.object.name === "module" &&
+        parent.left.property.type === "Identifier" &&
+        parent.left.property.name === "exports"
+      ) {
+        exportName = "module.exports";
+      } else {
+        return null;
+      }
+      return patternToProperty(definition.name, {
+        kind: "export param",
+        exportName,
+        index: definition.index,
+      });
+    }
+  }
+
+  if (node.type === "MemberExpression" && !node.computed) {
+    const origin = getReferenceOrigin(node.object, scope);
+    return origin && addProperty(origin, node.property.name);
+  }
+
+  return null;
+}
+
+function patternToProperty(
+  id /*: Node */,
+  base /*: ReferenceOrigin */
+) /*: ?ReferenceOrigin */ {
+  const path = getPatternPath(id);
+  return path && path.reduce(addProperty, base);
+}
+
+// Adds a property to a given origin. If it was a namespace import it becomes
+// a named import, so that `import * as x from "foo"; x.bar` and
+// `import { bar } from "foo"` have the same origin.
+function addProperty(
+  origin /*: ReferenceOrigin */,
+  name /*: string */
+) /* ReferenceOrigin */ {
+  if (origin.kind === "import *") {
+    return {
+      kind: "import",
+      source: origin.source,
+      name,
+    };
+  }
+  if (origin.kind === "property") {
+    return {
+      kind: "property",
+      base: origin.base,
+      path: origin.path + "." + name,
+    };
+  }
+  return {
+    kind: "property",
+    base: origin,
+    path: name,
+  };
+}
+
+// if "node" is c of { a: { b: c } }, the result is ["a","b"]
+function getPatternPath(node /*: Node */) /*: ?string[] */ {
+  let current = node;
+  const path = [];
+
+  // Unshift keys to path while going up
+  do {
+    const property = current.parent;
+    if (
+      property.type === "ArrayPattern" ||
+      property.type === "AssignmentPattern" ||
+      property.computed
+    ) {
+      // These nodes are not supported.
+      return null;
+    }
+    if (property.type === "Property") {
+      path.unshift(property.key.name);
+    } else {
+      // The destructuring pattern is finished
+      break;
+    }
+  } while ((current = current.parent.parent));
+
+  return path;
+}
+
+function reportError(context /*: Context */, node /*: Node */) {
+  const isMemberExpression = node.type === "MemberExpression";
+  const id = isMemberExpression ? node.property : node;
+  context.report({
+    node: id,
+    message: `t.${id.name}() is deprecated. Use t.cloneNode() instead.`,
+    fix(fixer) {
+      if (isMemberExpression) {
+        return fixer.replaceText(id, "cloneNode");
+      }
+    },
+  });
+}
+
+module.exports = {
+  meta: {
+    schema: [],
+    fixable: "code",
+  },
+  create(context /*: Context */) {
+    return {
+      CallExpression(node /*: Node */) {
+        const origin = getReferenceOrigin(node.callee, context.getScope());
+
+        if (!origin) return;
+
+        if (
+          origin.kind === "import" &&
+          (origin.name === "clone" || origin.name === "cloneDeep") &&
+          origin.source === "@babel/types"
+        ) {
+          // imported from @babel/types
+          return reportError(context, node.callee);
+        }
+
+        if (
+          origin.kind === "property" &&
+          (origin.path === "clone" || origin.path === "cloneDeep") &&
+          origin.base.kind === "import" &&
+          origin.base.name === "types" &&
+          origin.base.source === "@babel/core"
+        ) {
+          // imported from @babel/core
+          return reportError(context, node.callee);
+        }
+
+        if (
+          origin.kind === "property" &&
+          (origin.path === "types.clone" ||
+            origin.path === "types.cloneDeep") &&
+          origin.base.kind === "export param" &&
+          (origin.base.exportName === "default" ||
+            origin.base.exportName === "module.exports") &&
+          origin.base.index === 0
+        ) {
+          // export default function ({ types: t }) {}
+          // module.exports = function ({ types: t }) {}
+          return reportError(context, node.callee);
+        }
+      },
+    };
+  },
+};
+
+/*:: // ESLint types
+
+type Node = { type: string, [string]: any };
+
+type Definition = {
+  type: "ImportedBinding",
+  name: Node,
+  node: Node,
+  parent: Node,
+};
+
+type Variable = {
+  defs: Definition[],
+};
+
+type Scope = {
+  set: Map<string, Variable>,
+  upper: ?Scope,
+};
+
+type Context = {
+  report(options: {
+    node: Node,
+    message: string,
+    fix?: (fixer: Fixer) => ?Fixer,
+  }): void,
+
+  getScope(): Scope,
+};
+
+type Fixer = {
+  replaceText(node: Node, replacement: string): Fixer,
+};
+*/
diff --git a/scripts/gulp-tasks.js b/scripts/gulp-tasks.js
index 47ca24303397f..972474f433645 100644
--- a/scripts/gulp-tasks.js
+++ b/scripts/gulp-tasks.js
@@ -131,10 +131,12 @@ function registerStandalonePackageTask(
           plugins,
         }),
         gulp.dest(standalonePath),
-        uglify(),
+      ].concat(
+        // Minification is super slow, so we skip it in CI.
+        process.env.CI ? [] : uglify(),
         rename({ extname: ".min.js" }),
-        gulp.dest(standalonePath),
-      ],
+        gulp.dest(standalonePath)
+      ),
       cb
     );
   });
diff --git a/scripts/test-cov.sh b/scripts/test-cov.sh
index 50f9f4f022c62..6914ef3fb0f96 100755
--- a/scripts/test-cov.sh
+++ b/scripts/test-cov.sh
@@ -1,6 +1,10 @@
 #!/bin/bash
 set -e
 
-testDirs=`TEST_TYPE=cov scripts/_get-test-directories.sh`
-node_modules/.bin/nyc node_modules/mocha/bin/_mocha --opts test/mocha.opts $testDirs
-node_modules/.bin/nyc report --reporter=json
+jestArgs="--coverage"
+
+if [ -n "$CI" ]; then
+  jestArgs="${jestArgs} --maxWorkers=4 --ci"
+fi
+
+node_modules/.bin/jest $jestArgs
diff --git a/scripts/test.sh b/scripts/test.sh
index 017e24c57227a..c5cb866956b77 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -1,14 +1,26 @@
 #!/bin/bash
 set -e
 
-if [ -z "$TEST_GREP" ]; then
-   TEST_GREP=""
-fi
-
 node="node"
+jestArgs=()
 
 if [ "$TEST_DEBUG" ]; then
-   node="node --inspect --debug-brk"
+  node="node --inspect-brk"
+  jestArgs+=("--runInBand")
+fi
+
+if [ -n "$CI" ]; then
+  jestArgs+=("--maxWorkers=4")
+  jestArgs+=("--ci")
+fi
+
+if [ -n "$TEST_GREP" ]; then
+  jestArgs+=("-t")
+  jestArgs+=("$TEST_GREP")
+fi
+
+if [ -n "$TEST_ONLY" ]; then
+  jestArgs+=("packages/.*$TEST_ONLY.*/test")
 fi
 
-$node node_modules/mocha/bin/_mocha `scripts/_get-test-directories.sh` --opts test/mocha.opts --grep "$TEST_GREP"
+$node node_modules/.bin/jest "${jestArgs[@]}"
diff --git a/scripts/tests/test262/run_babylon_test262.js b/scripts/tests/test262/run_babylon_test262.js
index 45f88d5916f78..9f4bd96bd634c 100644
--- a/scripts/tests/test262/run_babylon_test262.js
+++ b/scripts/tests/test262/run_babylon_test262.js
@@ -4,7 +4,7 @@ const path = require("path");
 const chalk = require("chalk");
 const utils = require("./run_babylon_test262_utils");
 
-const testDir = path.join(__dirname, "../../../build/test262/test");
+const testDir = path.join(__dirname, "../../../build/test262");
 const whitelistFile = path.join(__dirname, "test262_whitelist.txt");
 const plugins = ["asyncGenerators", "objectRestSpread", "optionalCatchBinding"];
 const shouldUpdate = process.argv.indexOf("--update-whitelist") > -1;
diff --git a/scripts/tests/test262/run_babylon_test262_utils.js b/scripts/tests/test262/run_babylon_test262_utils.js
index 3b30125312747..2b7bbe35b1dcf 100644
--- a/scripts/tests/test262/run_babylon_test262_utils.js
+++ b/scripts/tests/test262/run_babylon_test262_utils.js
@@ -1,8 +1,8 @@
 "use strict";
 
 const fs = require("graceful-fs");
-const path = require("path");
-const promisify = require("util.promisify");
+const promisify = require("util").promisify;
+const TestStream = require("test262-stream");
 const pfs = {
   readFile: promisify(fs.readFile),
   writeFile: promisify(fs.writeFile),
@@ -12,115 +12,35 @@ const pfs = {
 
 const parse = require("../../../packages/babylon").parse;
 
-const modulePattern = /^\s*-\s*module\s*$|^\s*flags\s*:.*\bmodule\b/m;
-const noStrictPattern = /^\s*-\s*noStrict\s*$|^\s*flags\s*:.*\bnoStrict\b/m;
-const onlyStrictPattern = /^\s*-\s*onlyStrict\s*$|^\s*flags\s*:.*\bonlyStrict\b/m;
-const rawPattern = /^\s*-\s*raw\s*$|^\s*flags\s*:.*\braw\b/m;
-const testNamePattern = /^(?!.*_FIXTURE).*\.[jJ][sS]$/;
-
-function flatten(array) {
-  const flattened = [];
-  array.forEach(function(element) {
-    if (Array.isArray(element)) {
-      flattened.push.apply(flattened, element);
-    } else {
-      flattened.push(element);
-    }
-  });
-  return flattened;
-}
-
-function hasEarlyError(src) {
-  return !!(
-    src.match(/^\s*negative:\s*$/m) && src.match(/^\s+phase:\s*early\s*$/m)
-  );
-}
-
-function readDirDeep(dirName) {
-  return pfs.readdir(dirName).then(function(contents) {
-    return Promise.all(
-      contents.map(function(name) {
-        return findTests(path.join(dirName, name));
-      })
-    ).then(flatten);
+exports.getTests = function(testDir) {
+  const stream = new TestStream(testDir, { omitRuntime: true });
+  const tests = [];
+
+  stream.on("data", test => {
+    // strip test/
+    const fileName = test.file.substr(5);
+
+    tests.push({
+      contents: test.contents,
+      fileName,
+      id: `${fileName}(${test.scenario})`,
+      sourceType: test.attrs.flags.module ? "module" : "script",
+      expectedError:
+        !!test.attrs.negative &&
+        (test.attrs.negative.phase === "parse" ||
+          test.attrs.negative.phase === "early"),
+    });
   });
-}
 
-function findTests(name) {
-  return pfs.stat(name).then(function(stat) {
-    if (stat.isDirectory()) {
-      return readDirDeep(name);
-    }
-
-    return name;
+  return new Promise((resolve, reject) => {
+    stream.on("end", () => resolve(tests));
+    stream.on("error", reject);
   });
-}
-
-function readTest(fileName, testDir) {
-  if (!testNamePattern.test(fileName)) {
-    return Promise.resolve([]);
-  }
-
-  return pfs.readFile(fileName, "utf-8").then(function(contents) {
-    return makeScenarios(path.relative(testDir, fileName), contents);
-  });
-}
-
-function makeScenarios(fileName, testContent) {
-  const scenarios = [];
-  const base = {
-    fileName: fileName,
-    isModule: modulePattern.test(testContent),
-    expectedError: hasEarlyError(testContent),
-  };
-  const isNoStrict = noStrictPattern.test(testContent);
-  const isOnlyStrict = onlyStrictPattern.test(testContent);
-  const isRaw = rawPattern.test(testContent);
-
-  if (!isOnlyStrict) {
-    scenarios.push(
-      Object.assign(
-        {
-          id: fileName + "(default)",
-          content: testContent,
-        },
-        base
-      )
-    );
-  }
-
-  if (!isNoStrict && !isRaw) {
-    scenarios.push(
-      Object.assign(
-        {
-          id: fileName + "(strict mode)",
-          content: "'use strict';\n" + testContent,
-        },
-        base
-      )
-    );
-  }
-
-  return scenarios;
-}
-
-exports.getTests = function(testDir) {
-  return findTests(testDir)
-    .then(function(testPaths) {
-      return Promise.all(
-        testPaths.map(function(path) {
-          return readTest(path, testDir);
-        })
-      );
-    })
-    .then(flatten);
 };
 
 exports.runTest = function(test, plugins) {
-  const sourceType = test.isModule ? "module" : "script";
-
   try {
-    parse(test.content, { sourceType: sourceType, plugins: plugins });
+    parse(test.contents, { sourceType: test.sourceType, plugins: plugins });
     test.actualError = false;
   } catch (err) {
     test.actualError = true;
diff --git a/scripts/tests/test262/test262_whitelist.txt b/scripts/tests/test262/test262_whitelist.txt
index 2f6696503cc40..e10be4e105c9c 100644
--- a/scripts/tests/test262/test262_whitelist.txt
+++ b/scripts/tests/test262/test262_whitelist.txt
@@ -1,1319 +1,297 @@
-# This file lists tests that are known to produce incorrect results when parsed
-# with Babylon:
-#
-# - Tests that are expected to parse successfully but for which Babylon reports
-#   a syntax error
-# - Tests that contain invalid syntax but for which Babylon reports no syntax
-#   error
-#
-# Entries should be removed incrementally as Babylon is improved.
-
-annexB/language/statements/for-in/bare-initializer.js(default)
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+built-ins/DataView/prototype/getBigUint64/toindex-byteoffset-toprimitive.js(default)
+built-ins/DataView/prototype/getBigUint64/toindex-byteoffset-toprimitive.js(strict mode)
+built-ins/DataView/prototype/getBigUint64/toindex-byteoffset-wrapped-values.js(default)
+built-ins/DataView/prototype/getBigUint64/toindex-byteoffset-wrapped-values.js(strict mode)
+built-ins/DataView/prototype/getBigUint64/toindex-byteoffset.js(default)
+built-ins/DataView/prototype/getBigUint64/toindex-byteoffset.js(strict mode)
+built-ins/DataView/prototype/setBigInt64/detached-buffer.js(default)
+built-ins/DataView/prototype/setBigInt64/detached-buffer.js(strict mode)
+built-ins/DataView/prototype/setBigInt64/index-is-out-of-range.js(default)
+built-ins/DataView/prototype/setBigInt64/index-is-out-of-range.js(strict mode)
+built-ins/DataView/prototype/setBigInt64/negative-byteoffset-throws.js(default)
+built-ins/DataView/prototype/setBigInt64/negative-byteoffset-throws.js(strict mode)
+built-ins/DataView/prototype/setBigInt64/return-abrupt-from-tonumber-byteoffset-symbol.js(default)
+built-ins/DataView/prototype/setBigInt64/return-abrupt-from-tonumber-byteoffset-symbol.js(strict mode)
+built-ins/DataView/prototype/setBigInt64/return-abrupt-from-tonumber-byteoffset.js(default)
+built-ins/DataView/prototype/setBigInt64/return-abrupt-from-tonumber-byteoffset.js(strict mode)
+built-ins/DataView/prototype/setBigInt64/set-values-little-endian-order.js(default)
+built-ins/DataView/prototype/setBigInt64/set-values-little-endian-order.js(strict mode)
+built-ins/DataView/prototype/setBigInt64/to-boolean-littleendian.js(default)
+built-ins/DataView/prototype/setBigInt64/to-boolean-littleendian.js(strict mode)
+built-ins/DataView/prototype/setBigInt64/toindex-byteoffset.js(default)
+built-ins/DataView/prototype/setBigInt64/toindex-byteoffset.js(strict mode)
+built-ins/Function/prototype/toString/intrinsics.js(strict mode)
 built-ins/JSON/stringify/bigint-order.js(default)
 built-ins/JSON/stringify/bigint-order.js(strict mode)
 built-ins/JSON/stringify/bigint-replacer.js(default)
@@ -1328,18 +306,901 @@ built-ins/Object/bigint.js(default)
 built-ins/Object/bigint.js(strict mode)
 built-ins/Object/setPrototypeOf/bigint.js(default)
 built-ins/Object/setPrototypeOf/bigint.js(strict mode)
+built-ins/String/prototype/indexOf/position-tointeger-bigint.js(default)
+built-ins/String/prototype/indexOf/position-tointeger-bigint.js(strict mode)
+built-ins/String/prototype/indexOf/searchstring-tostring-bigint.js(default)
+built-ins/String/prototype/indexOf/searchstring-tostring-bigint.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/coerced-values-end.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/coerced-values-end.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/coerced-values-start.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/coerced-values-start.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/coerced-values-target.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/coerced-values-target.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-end.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-end.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-out-of-bounds-end.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-out-of-bounds-end.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-out-of-bounds-start.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-out-of-bounds-start.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-out-of-bounds-target.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-out-of-bounds-target.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-start.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-start.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-target.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/negative-target.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/non-negative-out-of-bounds-end.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/non-negative-out-of-bounds-end.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/non-negative-out-of-bounds-target-and-start.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/non-negative-out-of-bounds-target-and-start.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/non-negative-target-and-start.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/non-negative-target-and-start.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/non-negative-target-start-and-end.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/non-negative-target-start-and-end.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/return-this.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/return-this.js(strict mode)
+built-ins/TypedArray/prototype/copyWithin/BigInt/undefined-end.js(default)
+built-ins/TypedArray/prototype/copyWithin/BigInt/undefined-end.js(strict mode)
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+built-ins/TypedArray/prototype/entries/BigInt/iter-prototype.js(strict mode)
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+built-ins/TypedArray/prototype/entries/BigInt/return-itor.js(strict mode)
+built-ins/TypedArray/prototype/every/BigInt/callbackfn-arguments-with-thisarg.js(default)
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+built-ins/TypedArray/prototype/every/BigInt/callbackfn-arguments-without-thisarg.js(strict mode)
+built-ins/TypedArray/prototype/every/BigInt/callbackfn-no-interaction-over-non-integer.js(default)
+built-ins/TypedArray/prototype/every/BigInt/callbackfn-no-interaction-over-non-integer.js(strict mode)
+built-ins/TypedArray/prototype/every/BigInt/callbackfn-return-does-not-change-instance.js(default)
+built-ins/TypedArray/prototype/every/BigInt/callbackfn-return-does-not-change-instance.js(strict mode)
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+language/expressions/class/fields-derived-cls-direct-eval-err-contains-supercall-1.js(default)
+language/expressions/class/fields-derived-cls-direct-eval-err-contains-supercall-1.js(strict mode)
+language/expressions/class/fields-derived-cls-direct-eval-err-contains-supercall-2.js(default)
+language/expressions/class/fields-derived-cls-direct-eval-err-contains-supercall-2.js(strict mode)
+language/expressions/class/fields-derived-cls-direct-eval-err-contains-supercall.js(default)
+language/expressions/class/fields-derived-cls-direct-eval-err-contains-supercall.js(strict mode)
+language/expressions/class/fields-derived-cls-direct-eval-err-contains-superproperty-1.js(default)
+language/expressions/class/fields-derived-cls-direct-eval-err-contains-superproperty-1.js(strict mode)
+language/expressions/class/fields-derived-cls-direct-eval-err-contains-superproperty-2.js(default)
+language/expressions/class/fields-derived-cls-direct-eval-err-contains-superproperty-2.js(strict mode)
+language/expressions/class/fields-derived-cls-indirect-eval-err-contains-supercall-1.js(default)
+language/expressions/class/fields-derived-cls-indirect-eval-err-contains-supercall-1.js(strict mode)
+language/expressions/class/fields-derived-cls-indirect-eval-err-contains-supercall-2.js(default)
+language/expressions/class/fields-derived-cls-indirect-eval-err-contains-supercall-2.js(strict mode)
+language/expressions/class/fields-derived-cls-indirect-eval-err-contains-supercall.js(default)
+language/expressions/class/fields-derived-cls-indirect-eval-err-contains-supercall.js(strict mode)
+language/expressions/class/fields-derived-cls-indirect-eval-err-contains-superproperty-1.js(default)
+language/expressions/class/fields-derived-cls-indirect-eval-err-contains-superproperty-1.js(strict mode)
+language/expressions/class/fields-derived-cls-indirect-eval-err-contains-superproperty-2.js(default)
+language/expressions/class/fields-derived-cls-indirect-eval-err-contains-superproperty-2.js(strict mode)
+language/expressions/class/fields-direct-eval-err-contains-arguments.js(default)
+language/expressions/class/fields-direct-eval-err-contains-arguments.js(strict mode)
+language/expressions/class/fields-direct-eval-err-contains-newtarget.js(default)
+language/expressions/class/fields-direct-eval-err-contains-newtarget.js(strict mode)
+language/expressions/class/fields-evaluation-error-computed-name-referenceerror.js(default)
+language/expressions/class/fields-evaluation-error-computed-name-referenceerror.js(strict mode)
+language/expressions/class/fields-evaluation-error-computed-name-toprimitive-err.js(default)
+language/expressions/class/fields-evaluation-error-computed-name-toprimitive-err.js(strict mode)
+language/expressions/class/fields-evaluation-error-computed-name-tostring-err.js(default)
+language/expressions/class/fields-evaluation-error-computed-name-tostring-err.js(strict mode)
+language/expressions/class/fields-evaluation-error-computed-name-valueof-err.js(default)
+language/expressions/class/fields-evaluation-error-computed-name-valueof-err.js(strict mode)
+language/expressions/class/fields-indirect-eval-err-contains-arguments.js(default)
+language/expressions/class/fields-indirect-eval-err-contains-arguments.js(strict mode)
+language/expressions/class/fields-indirect-eval-err-contains-newtarget.js(default)
+language/expressions/class/fields-indirect-eval-err-contains-newtarget.js(strict mode)
+language/expressions/class/fields-init-err-evaluation.js(default)
+language/expressions/class/fields-init-err-evaluation.js(strict mode)
+language/expressions/class/fields-init-value-defined-after-class.js(default)
+language/expressions/class/fields-init-value-defined-after-class.js(strict mode)
+language/expressions/class/fields-init-value-incremental.js(default)
+language/expressions/class/fields-init-value-incremental.js(strict mode)
+language/expressions/class/fields-multiple-definitions-computed-names.js(default)
+language/expressions/class/fields-multiple-definitions-computed-names.js(strict mode)
+language/expressions/class/fields-multiple-definitions-computed-symbol-names.js(default)
+language/expressions/class/fields-multiple-definitions-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-multiple-definitions-literal-names.js(default)
+language/expressions/class/fields-multiple-definitions-literal-names.js(strict mode)
+language/expressions/class/fields-multiple-definitions-private-names.js(default)
+language/expressions/class/fields-multiple-definitions-private-names.js(strict mode)
+language/expressions/class/fields-multiple-definitions-string-literal-names.js(default)
+language/expressions/class/fields-multiple-definitions-string-literal-names.js(strict mode)
+language/expressions/class/fields-multiple-stacked-definitions-computed-names.js(default)
+language/expressions/class/fields-multiple-stacked-definitions-computed-names.js(strict mode)
+language/expressions/class/fields-multiple-stacked-definitions-computed-symbol-names.js(default)
+language/expressions/class/fields-multiple-stacked-definitions-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-multiple-stacked-definitions-literal-names.js(default)
+language/expressions/class/fields-multiple-stacked-definitions-literal-names.js(strict mode)
+language/expressions/class/fields-multiple-stacked-definitions-private-names.js(default)
+language/expressions/class/fields-multiple-stacked-definitions-private-names.js(strict mode)
+language/expressions/class/fields-multiple-stacked-definitions-string-literal-names.js(default)
+language/expressions/class/fields-multiple-stacked-definitions-string-literal-names.js(strict mode)
+language/expressions/class/fields-new-no-sc-line-method-computed-names.js(default)
+language/expressions/class/fields-new-no-sc-line-method-computed-names.js(strict mode)
+language/expressions/class/fields-new-no-sc-line-method-computed-symbol-names.js(default)
+language/expressions/class/fields-new-no-sc-line-method-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-new-no-sc-line-method-literal-names.js(default)
+language/expressions/class/fields-new-no-sc-line-method-literal-names.js(strict mode)
+language/expressions/class/fields-new-no-sc-line-method-private-names.js(default)
+language/expressions/class/fields-new-no-sc-line-method-private-names.js(strict mode)
+language/expressions/class/fields-new-no-sc-line-method-string-literal-names.js(default)
+language/expressions/class/fields-new-no-sc-line-method-string-literal-names.js(strict mode)
+language/expressions/class/fields-new-sc-line-gen-computed-names.js(default)
+language/expressions/class/fields-new-sc-line-gen-computed-names.js(strict mode)
+language/expressions/class/fields-new-sc-line-gen-computed-symbol-names.js(default)
+language/expressions/class/fields-new-sc-line-gen-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-new-sc-line-gen-literal-names.js(default)
+language/expressions/class/fields-new-sc-line-gen-literal-names.js(strict mode)
+language/expressions/class/fields-new-sc-line-gen-private-names.js(default)
+language/expressions/class/fields-new-sc-line-gen-private-names.js(strict mode)
+language/expressions/class/fields-new-sc-line-gen-string-literal-names.js(default)
+language/expressions/class/fields-new-sc-line-gen-string-literal-names.js(strict mode)
+language/expressions/class/fields-new-sc-line-method-computed-names.js(default)
+language/expressions/class/fields-new-sc-line-method-computed-names.js(strict mode)
+language/expressions/class/fields-new-sc-line-method-computed-symbol-names.js(default)
+language/expressions/class/fields-new-sc-line-method-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-new-sc-line-method-literal-names.js(default)
+language/expressions/class/fields-new-sc-line-method-literal-names.js(strict mode)
+language/expressions/class/fields-new-sc-line-method-private-names.js(default)
+language/expressions/class/fields-new-sc-line-method-private-names.js(strict mode)
+language/expressions/class/fields-new-sc-line-method-string-literal-names.js(default)
+language/expressions/class/fields-new-sc-line-method-string-literal-names.js(strict mode)
+language/expressions/class/fields-redeclaration-symbol.js(default)
+language/expressions/class/fields-redeclaration-symbol.js(strict mode)
+language/expressions/class/fields-redeclaration.js(default)
+language/expressions/class/fields-redeclaration.js(strict mode)
+language/expressions/class/fields-regular-definitions-computed-names.js(default)
+language/expressions/class/fields-regular-definitions-computed-names.js(strict mode)
+language/expressions/class/fields-regular-definitions-computed-symbol-names.js(default)
+language/expressions/class/fields-regular-definitions-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-regular-definitions-literal-names.js(default)
+language/expressions/class/fields-regular-definitions-literal-names.js(strict mode)
+language/expressions/class/fields-regular-definitions-private-names.js(default)
+language/expressions/class/fields-regular-definitions-private-names.js(strict mode)
+language/expressions/class/fields-regular-definitions-string-literal-names.js(default)
+language/expressions/class/fields-regular-definitions-string-literal-names.js(strict mode)
+language/expressions/class/fields-same-line-async-gen-computed-names.js(default)
+language/expressions/class/fields-same-line-async-gen-computed-names.js(strict mode)
+language/expressions/class/fields-same-line-async-gen-computed-symbol-names.js(default)
+language/expressions/class/fields-same-line-async-gen-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-same-line-async-gen-literal-names.js(default)
+language/expressions/class/fields-same-line-async-gen-literal-names.js(strict mode)
+language/expressions/class/fields-same-line-async-gen-private-names.js(default)
+language/expressions/class/fields-same-line-async-gen-private-names.js(strict mode)
+language/expressions/class/fields-same-line-async-gen-string-literal-names.js(default)
+language/expressions/class/fields-same-line-async-gen-string-literal-names.js(strict mode)
+language/expressions/class/fields-same-line-async-method-computed-names.js(default)
+language/expressions/class/fields-same-line-async-method-computed-names.js(strict mode)
+language/expressions/class/fields-same-line-async-method-computed-symbol-names.js(default)
+language/expressions/class/fields-same-line-async-method-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-same-line-async-method-literal-names.js(default)
+language/expressions/class/fields-same-line-async-method-literal-names.js(strict mode)
+language/expressions/class/fields-same-line-async-method-private-names.js(default)
+language/expressions/class/fields-same-line-async-method-private-names.js(strict mode)
+language/expressions/class/fields-same-line-async-method-string-literal-names.js(default)
+language/expressions/class/fields-same-line-async-method-string-literal-names.js(strict mode)
+language/expressions/class/fields-same-line-gen-computed-names.js(default)
+language/expressions/class/fields-same-line-gen-computed-names.js(strict mode)
+language/expressions/class/fields-same-line-gen-computed-symbol-names.js(default)
+language/expressions/class/fields-same-line-gen-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-same-line-gen-literal-names.js(default)
+language/expressions/class/fields-same-line-gen-literal-names.js(strict mode)
+language/expressions/class/fields-same-line-gen-private-names.js(default)
+language/expressions/class/fields-same-line-gen-private-names.js(strict mode)
+language/expressions/class/fields-same-line-gen-string-literal-names.js(default)
+language/expressions/class/fields-same-line-gen-string-literal-names.js(strict mode)
+language/expressions/class/fields-same-line-method-computed-names.js(default)
+language/expressions/class/fields-same-line-method-computed-names.js(strict mode)
+language/expressions/class/fields-same-line-method-computed-symbol-names.js(default)
+language/expressions/class/fields-same-line-method-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-same-line-method-literal-names.js(default)
+language/expressions/class/fields-same-line-method-literal-names.js(strict mode)
+language/expressions/class/fields-same-line-method-private-names.js(default)
+language/expressions/class/fields-same-line-method-private-names.js(strict mode)
+language/expressions/class/fields-same-line-method-string-literal-names.js(default)
+language/expressions/class/fields-same-line-method-string-literal-names.js(strict mode)
+language/expressions/class/fields-wrapped-in-sc-computed-names.js(default)
+language/expressions/class/fields-wrapped-in-sc-computed-names.js(strict mode)
+language/expressions/class/fields-wrapped-in-sc-computed-symbol-names.js(default)
+language/expressions/class/fields-wrapped-in-sc-computed-symbol-names.js(strict mode)
+language/expressions/class/fields-wrapped-in-sc-literal-names.js(default)
+language/expressions/class/fields-wrapped-in-sc-literal-names.js(strict mode)
+language/expressions/class/fields-wrapped-in-sc-private-names.js(default)
+language/expressions/class/fields-wrapped-in-sc-private-names.js(strict mode)
+language/expressions/class/fields-wrapped-in-sc-string-literal-names.js(default)
+language/expressions/class/fields-wrapped-in-sc-string-literal-names.js(strict mode)
+language/expressions/division/bigint-and-number.js(default)
+language/expressions/division/bigint-and-number.js(strict mode)
 language/expressions/division/bigint-arithmetic.js(default)
 language/expressions/division/bigint-arithmetic.js(strict mode)
 language/expressions/division/bigint-complex-infinity.js(default)
 language/expressions/division/bigint-complex-infinity.js(strict mode)
+language/expressions/division/bigint-errors.js(default)
+language/expressions/division/bigint-errors.js(strict mode)
+language/expressions/division/bigint-toprimitive.js(default)
+language/expressions/division/bigint-toprimitive.js(strict mode)
+language/expressions/division/bigint-wrapped-values.js(default)
+language/expressions/division/bigint-wrapped-values.js(strict mode)
 language/expressions/does-not-equals/bigint-and-bigint.js(default)
 language/expressions/does-not-equals/bigint-and-bigint.js(strict mode)
 language/expressions/does-not-equals/bigint-and-boolean.js(default)
@@ -1372,10 +1233,18 @@ language/expressions/equals/bigint-and-object.js(default)
 language/expressions/equals/bigint-and-object.js(strict mode)
 language/expressions/equals/bigint-and-string.js(default)
 language/expressions/equals/bigint-and-string.js(strict mode)
+language/expressions/exponentiation/bigint-and-number.js(default)
+language/expressions/exponentiation/bigint-and-number.js(strict mode)
 language/expressions/exponentiation/bigint-arithmetic.js(default)
 language/expressions/exponentiation/bigint-arithmetic.js(strict mode)
+language/expressions/exponentiation/bigint-errors.js(default)
+language/expressions/exponentiation/bigint-errors.js(strict mode)
 language/expressions/exponentiation/bigint-exp-operator-negative-throws.js(default)
 language/expressions/exponentiation/bigint-exp-operator-negative-throws.js(strict mode)
+language/expressions/exponentiation/bigint-toprimitive.js(default)
+language/expressions/exponentiation/bigint-toprimitive.js(strict mode)
+language/expressions/exponentiation/bigint-wrapped-values.js(default)
+language/expressions/exponentiation/bigint-wrapped-values.js(strict mode)
 language/expressions/exponentiation/bigint-zero-base-zero-exponent.js(default)
 language/expressions/exponentiation/bigint-zero-base-zero-exponent.js(strict mode)
 language/expressions/greater-than/bigint-and-bigint.js(default)
@@ -1394,6 +1263,18 @@ language/expressions/greater-than-or-equal/bigint-and-number-extremes.js(default
 language/expressions/greater-than-or-equal/bigint-and-number-extremes.js(strict mode)
 language/expressions/greater-than-or-equal/bigint-and-number.js(default)
 language/expressions/greater-than-or-equal/bigint-and-number.js(strict mode)
+language/expressions/left-shift/bigint-and-number.js(default)
+language/expressions/left-shift/bigint-and-number.js(strict mode)
+language/expressions/left-shift/bigint-errors.js(default)
+language/expressions/left-shift/bigint-errors.js(strict mode)
+language/expressions/left-shift/bigint-non-primitive.js(default)
+language/expressions/left-shift/bigint-non-primitive.js(strict mode)
+language/expressions/left-shift/bigint-toprimitive.js(default)
+language/expressions/left-shift/bigint-toprimitive.js(strict mode)
+language/expressions/left-shift/bigint-wrapped-values.js(default)
+language/expressions/left-shift/bigint-wrapped-values.js(strict mode)
+language/expressions/left-shift/bigint.js(default)
+language/expressions/left-shift/bigint.js(strict mode)
 language/expressions/less-than/bigint-and-bigint.js(default)
 language/expressions/less-than/bigint-and-bigint.js(strict mode)
 language/expressions/less-than/bigint-and-non-finite.js(default)
@@ -1412,12 +1293,32 @@ language/expressions/less-than-or-equal/bigint-and-number.js(default)
 language/expressions/less-than-or-equal/bigint-and-number.js(strict mode)
 language/expressions/logical-not/bigint.js(default)
 language/expressions/logical-not/bigint.js(strict mode)
+language/expressions/modulus/bigint-and-number.js(default)
+language/expressions/modulus/bigint-and-number.js(strict mode)
 language/expressions/modulus/bigint-arithmetic.js(default)
 language/expressions/modulus/bigint-arithmetic.js(strict mode)
+language/expressions/modulus/bigint-errors.js(default)
+language/expressions/modulus/bigint-errors.js(strict mode)
 language/expressions/modulus/bigint-modulo-zero.js(default)
 language/expressions/modulus/bigint-modulo-zero.js(strict mode)
+language/expressions/modulus/bigint-toprimitive.js(default)
+language/expressions/modulus/bigint-toprimitive.js(strict mode)
+language/expressions/modulus/bigint-wrapped-values.js(default)
+language/expressions/modulus/bigint-wrapped-values.js(strict mode)
+language/expressions/multiplication/bigint-and-number.js(default)
+language/expressions/multiplication/bigint-and-number.js(strict mode)
 language/expressions/multiplication/bigint-arithmetic.js(default)
 language/expressions/multiplication/bigint-arithmetic.js(strict mode)
+language/expressions/multiplication/bigint-errors.js(default)
+language/expressions/multiplication/bigint-errors.js(strict mode)
+language/expressions/multiplication/bigint-toprimitive.js(default)
+language/expressions/multiplication/bigint-toprimitive.js(strict mode)
+language/expressions/multiplication/bigint-wrapped-values.js(default)
+language/expressions/multiplication/bigint-wrapped-values.js(strict mode)
+language/expressions/object/let-non-strict-access.js(default)
+language/expressions/object/let-non-strict-syntax.js(default)
+language/expressions/object/yield-non-strict-access.js(default)
+language/expressions/object/yield-non-strict-syntax.js(default)
 language/expressions/postfix-decrement/bigint.js(default)
 language/expressions/postfix-decrement/bigint.js(strict mode)
 language/expressions/postfix-increment/bigint.js(default)
@@ -1426,6 +1327,18 @@ language/expressions/prefix-decrement/bigint.js(default)
 language/expressions/prefix-decrement/bigint.js(strict mode)
 language/expressions/prefix-increment/bigint.js(default)
 language/expressions/prefix-increment/bigint.js(strict mode)
+language/expressions/right-shift/bigint-and-number.js(default)
+language/expressions/right-shift/bigint-and-number.js(strict mode)
+language/expressions/right-shift/bigint-errors.js(default)
+language/expressions/right-shift/bigint-errors.js(strict mode)
+language/expressions/right-shift/bigint-non-primitive.js(default)
+language/expressions/right-shift/bigint-non-primitive.js(strict mode)
+language/expressions/right-shift/bigint-toprimitive.js(default)
+language/expressions/right-shift/bigint-toprimitive.js(strict mode)
+language/expressions/right-shift/bigint-wrapped-values.js(default)
+language/expressions/right-shift/bigint-wrapped-values.js(strict mode)
+language/expressions/right-shift/bigint.js(default)
+language/expressions/right-shift/bigint.js(strict mode)
 language/expressions/strict-does-not-equals/bigint-and-bigint.js(default)
 language/expressions/strict-does-not-equals/bigint-and-bigint.js(strict mode)
 language/expressions/strict-does-not-equals/bigint-and-boolean.js(default)
@@ -1458,8 +1371,16 @@ language/expressions/strict-equals/bigint-and-object.js(default)
 language/expressions/strict-equals/bigint-and-object.js(strict mode)
 language/expressions/strict-equals/bigint-and-string.js(default)
 language/expressions/strict-equals/bigint-and-string.js(strict mode)
+language/expressions/subtraction/bigint-and-number.js(default)
+language/expressions/subtraction/bigint-and-number.js(strict mode)
 language/expressions/subtraction/bigint-arithmetic.js(default)
 language/expressions/subtraction/bigint-arithmetic.js(strict mode)
+language/expressions/subtraction/bigint-errors.js(default)
+language/expressions/subtraction/bigint-errors.js(strict mode)
+language/expressions/subtraction/bigint-toprimitive.js(default)
+language/expressions/subtraction/bigint-toprimitive.js(strict mode)
+language/expressions/subtraction/bigint-wrapped-values.js(default)
+language/expressions/subtraction/bigint-wrapped-values.js(strict mode)
 language/expressions/typeof/bigint.js(default)
 language/expressions/typeof/bigint.js(strict mode)
 language/expressions/unary-minus/bigint-non-primitive.js(default)
@@ -1468,4 +1389,858 @@ language/expressions/unary-minus/bigint.js(default)
 language/expressions/unary-minus/bigint.js(strict mode)
 language/expressions/unary-plus/bigint-throws.js(default)
 language/expressions/unary-plus/bigint-throws.js(strict mode)
+language/expressions/unsigned-right-shift/bigint-and-number.js(default)
+language/expressions/unsigned-right-shift/bigint-and-number.js(strict mode)
+language/expressions/unsigned-right-shift/bigint-errors.js(default)
+language/expressions/unsigned-right-shift/bigint-errors.js(strict mode)
+language/expressions/unsigned-right-shift/bigint-non-primitive.js(default)
+language/expressions/unsigned-right-shift/bigint-non-primitive.js(strict mode)
+language/expressions/unsigned-right-shift/bigint-toprimitive.js(default)
+language/expressions/unsigned-right-shift/bigint-toprimitive.js(strict mode)
+language/expressions/unsigned-right-shift/bigint-wrapped-values.js(default)
+language/expressions/unsigned-right-shift/bigint-wrapped-values.js(strict mode)
+language/expressions/unsigned-right-shift/bigint.js(default)
+language/expressions/unsigned-right-shift/bigint.js(strict mode)
+language/literals/numeric/numeric-separator-literal-bil-bd-nsl-bd.js(default)
+language/literals/numeric/numeric-separator-literal-bil-bd-nsl-bd.js(strict mode)
+language/literals/numeric/numeric-separator-literal-bil-bd-nsl-bds.js(default)
+language/literals/numeric/numeric-separator-literal-bil-bd-nsl-bds.js(strict mode)
+language/literals/numeric/numeric-separator-literal-bil-bds-nsl-bd.js(default)
+language/literals/numeric/numeric-separator-literal-bil-bds-nsl-bd.js(strict mode)
+language/literals/numeric/numeric-separator-literal-bil-bds-nsl-bds.js(default)
+language/literals/numeric/numeric-separator-literal-bil-bds-nsl-bds.js(strict mode)
+language/literals/numeric/numeric-separator-literal-dd-dot-dd-ep-sign-minus-dd-nsl-dd.js(default)
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+language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-generator-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-let-declaration.js(default)
+language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-let-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-var-declaration.js(default)
+language/statements/switch/syntax/redeclaration/generator-declaration-attempt-to-redeclare-with-var-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-async-function-declaration.js(default)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-async-function-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-async-generator-declaration.js(default)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-async-generator-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-class-declaration.js(default)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-class-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-const-declaration.js(default)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-const-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-function-declaration.js(default)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-function-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-generator-declaration.js(default)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-generator-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-let-declaration.js(default)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-let-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-var-declaration.js(default)
+language/statements/switch/syntax/redeclaration/let-declaration-attempt-to-redeclare-with-var-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-function-declaration.js(default)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-function-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-generator-declaration.js(default)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-async-generator-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-class-declaration.js(default)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-class-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-const-declaration.js(default)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-const-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-function-declaration.js(default)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-function-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-generator-declaration.js(default)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-generator-declaration.js(strict mode)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-let-declaration.js(default)
+language/statements/switch/syntax/redeclaration/var-declaration-attempt-to-redeclare-with-let-declaration.js(strict mode)
+language/statements/try/early-catch-lex.js(default)
+language/statements/try/early-catch-lex.js(strict mode)
+language/statements/try/early-catch-var.js(default)
+language/statements/try/early-catch-var.js(strict mode)
+language/statements/while/decl-async-fun.js(default)
+language/statements/while/decl-async-fun.js(strict mode)
+language/statements/while/decl-async-gen.js(default)
+language/statements/while/decl-async-gen.js(strict mode)
+language/statements/while/labelled-fn-stmt.js(default)
+language/statements/with/decl-async-fun.js(default)
+language/statements/with/decl-async-gen.js(default)
+language/statements/with/labelled-fn-stmt.js(default)
+language/white-space/mongolian-vowel-separator.js(default)
+language/white-space/mongolian-vowel-separator.js(strict mode)
diff --git a/test/mocha.opts b/test/mocha.opts
deleted file mode 100644
index 939595b1b1d78..0000000000000
--- a/test/mocha.opts
+++ /dev/null
@@ -1 +0,0 @@
---reporter dot --ui tdd --timeout 10000 --compilers js:@babel/register
diff --git a/test/testSetupFile.js b/test/testSetupFile.js
new file mode 100644
index 0000000000000..b5062b8542544
--- /dev/null
+++ b/test/testSetupFile.js
@@ -0,0 +1 @@
+jest.setTimeout(10000);
diff --git a/test/warning.js b/test/warning.js
deleted file mode 100644
index 072f4a8f07c26..0000000000000
--- a/test/warning.js
+++ /dev/null
@@ -1,2 +0,0 @@
-console.error("Don't run `mocha` directly. Use `make test`. See CONTRIBUTING.md for usage instructions.");
-process.exit(0);
diff --git a/yarn.lock b/yarn.lock
index 2b1189861f8fd..65b0a27b7ef78 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,9 +2,9 @@
 # yarn lockfile v1
 
 
-"@babel/cli@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/cli/-/cli-7.0.0-beta.39.tgz#0764d7ed63880ab322762f1401cc32bb9b4ec006"
+"@babel/cli@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/cli/-/cli-7.0.0-beta.41.tgz#d9fa9d5409a1e73a63d0e3ccc0889afc1f20d946"
   dependencies:
     commander "^2.8.1"
     convert-source-map "^1.1.0"
@@ -17,646 +17,766 @@
   optionalDependencies:
     chokidar "^1.6.1"
 
-"@babel/code-frame@7.0.0-beta.36":
-  version "7.0.0-beta.36"
-  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.0.0-beta.36.tgz#2349d7ec04b3a06945ae173280ef8579b63728e4"
+"@babel/code-frame@7.0.0-beta.40", "@babel/code-frame@^7.0.0-beta.35", "@babel/code-frame@^7.0.0-beta.40":
+  version "7.0.0-beta.40"
+  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.0.0-beta.40.tgz#37e2b0cf7c56026b4b21d3927cadf81adec32ac6"
   dependencies:
-    chalk "^2.0.0"
-    esutils "^2.0.2"
-    js-tokens "^3.0.0"
+    "@babel/highlight" "7.0.0-beta.40"
 
-"@babel/code-frame@7.0.0-beta.38":
-  version "7.0.0-beta.38"
-  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.0.0-beta.38.tgz#c0af5930617e55e050336838e3a3670983b0b2b2"
+"@babel/code-frame@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.0.0-beta.41.tgz#68845c10a895050ab643e869100bbcf294b64e09"
   dependencies:
-    chalk "^2.0.0"
-    esutils "^2.0.2"
-    js-tokens "^3.0.0"
+    "@babel/highlight" "7.0.0-beta.41"
 
-"@babel/code-frame@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.0.0-beta.39.tgz#91c90bb65207fc5a55128cb54956ded39e850457"
+"@babel/core@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.0.0-beta.41.tgz#796a318ffd2c46e006f133a474b3be67f94e9ca5"
   dependencies:
-    chalk "^2.0.0"
-    esutils "^2.0.2"
-    js-tokens "^3.0.0"
-
-"@babel/core@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.0.0-beta.39.tgz#242b8c0b99573de0395eaaa94e2d82a9cd008cf3"
-  dependencies:
-    "@babel/code-frame" "7.0.0-beta.39"
-    "@babel/generator" "7.0.0-beta.39"
-    "@babel/helpers" "7.0.0-beta.39"
-    "@babel/template" "7.0.0-beta.39"
-    "@babel/traverse" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
-    babylon "7.0.0-beta.39"
+    "@babel/code-frame" "7.0.0-beta.41"
+    "@babel/generator" "7.0.0-beta.41"
+    "@babel/helpers" "7.0.0-beta.41"
+    "@babel/template" "7.0.0-beta.41"
+    "@babel/traverse" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
+    babylon "7.0.0-beta.41"
     convert-source-map "^1.1.0"
-    debug "^3.0.1"
+    debug "^3.1.0"
     json5 "^0.5.0"
     lodash "^4.2.0"
     micromatch "^2.3.11"
     resolve "^1.3.2"
+    semver "^5.4.1"
     source-map "^0.5.0"
 
-"@babel/generator@7.0.0-beta.38":
-  version "7.0.0-beta.38"
-  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.0.0-beta.38.tgz#6115a66663e3adfd1d6844029ffb2354680182eb"
+"@babel/generator@7.0.0-beta.40":
+  version "7.0.0-beta.40"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.0.0-beta.40.tgz#ab61f9556f4f71dbd1138949c795bb9a21e302ea"
   dependencies:
-    "@babel/types" "7.0.0-beta.38"
+    "@babel/types" "7.0.0-beta.40"
     jsesc "^2.5.1"
     lodash "^4.2.0"
     source-map "^0.5.0"
     trim-right "^1.0.1"
 
-"@babel/generator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.0.0-beta.39.tgz#d2c9f0a9c47d5ff288f0306aedd0cf89983cb6ed"
+"@babel/generator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.0.0-beta.41.tgz#5fce0676cea5acc1d493480d9fb7317ea2164d3f"
   dependencies:
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/types" "7.0.0-beta.41"
     jsesc "^2.5.1"
     lodash "^4.2.0"
     source-map "^0.5.0"
     trim-right "^1.0.1"
 
-"@babel/helper-annotate-as-pure@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.0.0-beta.39.tgz#cf9506c721c838806ca5eabe15783507ba2edce0"
+"@babel/helper-annotate-as-pure@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.0.0-beta.41.tgz#dcf9a282d013cc68dc8944966939b9db951948af"
   dependencies:
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-builder-binary-assignment-operator-visitor@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-builder-binary-assignment-operator-visitor/-/helper-builder-binary-assignment-operator-visitor-7.0.0-beta.39.tgz#ce97bd572aeb2b2c1200c7a49dba019659a95f3c"
+"@babel/helper-builder-binary-assignment-operator-visitor@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-builder-binary-assignment-operator-visitor/-/helper-builder-binary-assignment-operator-visitor-7.0.0-beta.41.tgz#7d30fa36fb7e2ac5d60d65990db41235718bc5df"
   dependencies:
-    "@babel/helper-explode-assignable-expression" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/helper-explode-assignable-expression" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-call-delegate@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-call-delegate/-/helper-call-delegate-7.0.0-beta.39.tgz#7851645811a4bc3eb7cf5f1c72b1c754d0a5e45d"
+"@babel/helper-call-delegate@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-call-delegate/-/helper-call-delegate-7.0.0-beta.41.tgz#a95bfbe164ce3b2cb2579772639a60941f67c906"
   dependencies:
-    "@babel/helper-hoist-variables" "7.0.0-beta.39"
-    "@babel/traverse" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/helper-hoist-variables" "7.0.0-beta.41"
+    "@babel/traverse" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-define-map@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-define-map/-/helper-define-map-7.0.0-beta.39.tgz#3da7e7a94a213fde02f936b08dc458f546350caa"
+"@babel/helper-define-map@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-define-map/-/helper-define-map-7.0.0-beta.41.tgz#7f0114bf0242441d96c2158b274843984b2f0b62"
   dependencies:
-    "@babel/helper-function-name" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/helper-function-name" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
     lodash "^4.2.0"
 
-"@babel/helper-explode-assignable-expression@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-explode-assignable-expression/-/helper-explode-assignable-expression-7.0.0-beta.39.tgz#13d3068b6408b9c191d402df62bd356220884f8f"
+"@babel/helper-explode-assignable-expression@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-explode-assignable-expression/-/helper-explode-assignable-expression-7.0.0-beta.41.tgz#d390d4da67eaea6457ff202bc416fae3b9820c79"
   dependencies:
-    "@babel/traverse" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/traverse" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-function-name@7.0.0-beta.36":
-  version "7.0.0-beta.36"
-  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.0.0-beta.36.tgz#366e3bc35147721b69009f803907c4d53212e88d"
+"@babel/helper-function-name@7.0.0-beta.40":
+  version "7.0.0-beta.40"
+  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.0.0-beta.40.tgz#9d033341ab16517f40d43a73f2d81fc431ccd7b6"
   dependencies:
-    "@babel/helper-get-function-arity" "7.0.0-beta.36"
-    "@babel/template" "7.0.0-beta.36"
-    "@babel/types" "7.0.0-beta.36"
+    "@babel/helper-get-function-arity" "7.0.0-beta.40"
+    "@babel/template" "7.0.0-beta.40"
+    "@babel/types" "7.0.0-beta.40"
 
-"@babel/helper-function-name@7.0.0-beta.38":
-  version "7.0.0-beta.38"
-  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.0.0-beta.38.tgz#dc6e74930efc7b0236b5ba72a633d34c778ba015"
+"@babel/helper-function-name@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.0.0-beta.41.tgz#5c50bc96c50b23383aad413b84a3ee806ceaa0e1"
   dependencies:
-    "@babel/helper-get-function-arity" "7.0.0-beta.38"
-    "@babel/template" "7.0.0-beta.38"
-    "@babel/types" "7.0.0-beta.38"
+    "@babel/helper-get-function-arity" "7.0.0-beta.41"
+    "@babel/template" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-function-name@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.0.0-beta.39.tgz#34f8ca0c46cdd7056ae706468a8078dab53dbc91"
+"@babel/helper-get-function-arity@7.0.0-beta.40":
+  version "7.0.0-beta.40"
+  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0-beta.40.tgz#ac0419cf067b0ec16453e1274f03878195791c6e"
   dependencies:
-    "@babel/helper-get-function-arity" "7.0.0-beta.39"
-    "@babel/template" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/types" "7.0.0-beta.40"
 
-"@babel/helper-get-function-arity@7.0.0-beta.36":
-  version "7.0.0-beta.36"
-  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0-beta.36.tgz#f5383bac9a96b274828b10d98900e84ee43e32b8"
+"@babel/helper-get-function-arity@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0-beta.41.tgz#04b9e89d783f6c2223fbb81e11e59235a7781713"
   dependencies:
-    "@babel/types" "7.0.0-beta.36"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-get-function-arity@7.0.0-beta.38":
-  version "7.0.0-beta.38"
-  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0-beta.38.tgz#5c27de7641ac31da6e947dcc8009bd31282d9d84"
+"@babel/helper-hoist-variables@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-hoist-variables/-/helper-hoist-variables-7.0.0-beta.41.tgz#c776a0c49cf359833b0cd8d4cacffb3fe78fe369"
   dependencies:
-    "@babel/types" "7.0.0-beta.38"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-get-function-arity@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0-beta.39.tgz#f542cb644c7866f9335b1ffc0614bbe633bd60ce"
+"@babel/helper-module-imports@7.0.0-beta.35":
+  version "7.0.0-beta.35"
+  resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.0.0-beta.35.tgz#308e350e731752cdb4d0f058df1d704925c64e0a"
   dependencies:
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/types" "7.0.0-beta.35"
+    lodash "^4.2.0"
 
-"@babel/helper-hoist-variables@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-hoist-variables/-/helper-hoist-variables-7.0.0-beta.39.tgz#3a2d4929783ef3445686e768f52bfcf9ffb182b9"
+"@babel/helper-module-imports@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.0.0-beta.41.tgz#c639ad715483bb6ec585eb08793d3220a062bc70"
   dependencies:
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/types" "7.0.0-beta.41"
+    lodash "^4.2.0"
 
-"@babel/helper-module-imports@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.0.0-beta.39.tgz#39e1fd4b8f5982b05417f73250a620070541192e"
+"@babel/helper-module-transforms@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-module-transforms/-/helper-module-transforms-7.0.0-beta.41.tgz#ecb27cdf7b7ced08bc6d1aa2cf67056a2596650b"
   dependencies:
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/helper-module-imports" "7.0.0-beta.41"
+    "@babel/helper-simple-access" "7.0.0-beta.41"
+    "@babel/helper-split-export-declaration" "7.0.0-beta.41"
+    "@babel/template" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
     lodash "^4.2.0"
 
-"@babel/helper-module-transforms@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-module-transforms/-/helper-module-transforms-7.0.0-beta.39.tgz#3ebf72bc2cb6453e9c5930a667496bdfa64bcf5e"
+"@babel/helper-optimise-call-expression@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.0.0-beta.41.tgz#4e2df61f5a0900ef113a3b861253136593d47f3d"
+  dependencies:
+    "@babel/types" "7.0.0-beta.41"
+
+"@babel/helper-plugin-utils@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.0.0-beta.41.tgz#b515524853b2e509409ccbcd8b0bc3586da3e7f0"
+
+"@babel/helper-regex@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-regex/-/helper-regex-7.0.0-beta.41.tgz#5c02e6e31546d4f4a928a82e1c1a28f0d8937637"
   dependencies:
-    "@babel/helper-module-imports" "7.0.0-beta.39"
-    "@babel/helper-simple-access" "7.0.0-beta.39"
-    "@babel/template" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
     lodash "^4.2.0"
 
-"@babel/helper-optimise-call-expression@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.0.0-beta.39.tgz#2f2c76665fb9128feb0b84a162b3dcaecc53a102"
+"@babel/helper-remap-async-to-generator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-remap-async-to-generator/-/helper-remap-async-to-generator-7.0.0-beta.41.tgz#212e2f3fc24635d25cc6f1bd394da1dde1f91c36"
+  dependencies:
+    "@babel/helper-annotate-as-pure" "7.0.0-beta.41"
+    "@babel/helper-wrap-function" "7.0.0-beta.41"
+    "@babel/template" "7.0.0-beta.41"
+    "@babel/traverse" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
+
+"@babel/helper-replace-supers@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-replace-supers/-/helper-replace-supers-7.0.0-beta.41.tgz#3c0c4a2e1f0cdd934ab0ef31bf41376f32f4ef74"
   dependencies:
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/helper-optimise-call-expression" "7.0.0-beta.41"
+    "@babel/template" "7.0.0-beta.41"
+    "@babel/traverse" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-regex@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-regex/-/helper-regex-7.0.0-beta.39.tgz#852d94c0eedcf1d9b8513cda01f18c4838592c41"
+"@babel/helper-simple-access@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-simple-access/-/helper-simple-access-7.0.0-beta.41.tgz#fd6791214dac026d6cc3f2a3b15477137205fbad"
   dependencies:
+    "@babel/template" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
     lodash "^4.2.0"
 
-"@babel/helper-remap-async-to-generator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-remap-async-to-generator/-/helper-remap-async-to-generator-7.0.0-beta.39.tgz#64e715ddd24fa60e02dd139acac0d58a55508433"
+"@babel/helper-split-export-declaration@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.0.0-beta.41.tgz#8a0a67ded225ab7abeb4ad1fc138b4e0e882abee"
   dependencies:
-    "@babel/helper-annotate-as-pure" "7.0.0-beta.39"
-    "@babel/helper-wrap-function" "7.0.0-beta.39"
-    "@babel/template" "7.0.0-beta.39"
-    "@babel/traverse" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-replace-supers@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-replace-supers/-/helper-replace-supers-7.0.0-beta.39.tgz#6ddb6167ad18904fd43d9f0df909b90fe09f0569"
+"@babel/helper-wrap-function@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helper-wrap-function/-/helper-wrap-function-7.0.0-beta.41.tgz#3f10b9f23de4fa9619af2ce65f666a037ee0fd43"
   dependencies:
-    "@babel/helper-optimise-call-expression" "7.0.0-beta.39"
-    "@babel/template" "7.0.0-beta.39"
-    "@babel/traverse" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/helper-function-name" "7.0.0-beta.41"
+    "@babel/template" "7.0.0-beta.41"
+    "@babel/traverse" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-simple-access@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-simple-access/-/helper-simple-access-7.0.0-beta.39.tgz#fbe9e70c4fe64e0dbe01e675b2bb97b5f3514d3a"
+"@babel/helpers@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.0.0-beta.41.tgz#66e1b9512a09677e0c4102d0569a8d2b8aceb119"
   dependencies:
-    "@babel/template" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
-    lodash "^4.2.0"
+    "@babel/template" "7.0.0-beta.41"
+    "@babel/traverse" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
 
-"@babel/helper-wrap-function@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helper-wrap-function/-/helper-wrap-function-7.0.0-beta.39.tgz#ef4e6ef66791276351b6609545394900552b35c9"
+"@babel/highlight@7.0.0-beta.40":
+  version "7.0.0-beta.40"
+  resolved "https://registry.yarnpkg.com/@babel/highlight/-/highlight-7.0.0-beta.40.tgz#b43d67d76bf46e1d10d227f68cddcd263786b255"
   dependencies:
-    "@babel/helper-function-name" "7.0.0-beta.39"
-    "@babel/template" "7.0.0-beta.39"
-    "@babel/traverse" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
+    chalk "^2.0.0"
+    esutils "^2.0.2"
+    js-tokens "^3.0.0"
+
+"@babel/highlight@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/highlight/-/highlight-7.0.0-beta.41.tgz#7e1d634de3821e664bc8ad9688f240530d239b95"
+  dependencies:
+    chalk "^2.0.0"
+    esutils "^2.0.2"
+    js-tokens "^3.0.0"
 
-"@babel/helpers@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.0.0-beta.39.tgz#13f7d4b959ef3cc0f2af59179237f5d302ded176"
+"@babel/plugin-proposal-async-generator-functions@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-async-generator-functions/-/plugin-proposal-async-generator-functions-7.0.0-beta.41.tgz#6e39a214a01ccda277d0db1aa9d542374d4a0c05"
   dependencies:
-    "@babel/template" "7.0.0-beta.39"
-    "@babel/traverse" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/helper-remap-async-to-generator" "7.0.0-beta.41"
+    "@babel/plugin-syntax-async-generators" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-async-generator-functions@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-async-generator-functions/-/plugin-proposal-async-generator-functions-7.0.0-beta.39.tgz#ae7fd6686c6709f374d5e531587afabd1fb19042"
+"@babel/plugin-proposal-class-properties@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.0.0-beta.41.tgz#b02d89d773239abe043e3c9424155635f854ca18"
   dependencies:
-    "@babel/helper-remap-async-to-generator" "7.0.0-beta.39"
-    "@babel/plugin-syntax-async-generators" "7.0.0-beta.39"
+    "@babel/helper-function-name" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-class-properties" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-class-properties@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.0.0-beta.39.tgz#251bf1cdbaa2d533897b57d26ac39cf52e25c734"
+"@babel/plugin-proposal-decorators@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-decorators/-/plugin-proposal-decorators-7.0.0-beta.41.tgz#850ad5a7ef321d24d498483da351c4eecc496e88"
   dependencies:
-    "@babel/helper-function-name" "7.0.0-beta.39"
-    "@babel/plugin-syntax-class-properties" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-decorators" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-decorators@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-decorators/-/plugin-proposal-decorators-7.0.0-beta.39.tgz#cfd96774bdeabfaca2055b3009d63423eb461259"
+"@babel/plugin-proposal-do-expressions@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-do-expressions/-/plugin-proposal-do-expressions-7.0.0-beta.41.tgz#67c2ebb550c2f94c96752dd062ede82f7144c364"
   dependencies:
-    "@babel/plugin-syntax-decorators" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-do-expressions" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-do-expressions@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-do-expressions/-/plugin-proposal-do-expressions-7.0.0-beta.39.tgz#d1e9925ee3c91198baa15521c2b0243ca8c4b01b"
+"@babel/plugin-proposal-export-default-from@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-export-default-from/-/plugin-proposal-export-default-from-7.0.0-beta.41.tgz#acb46d6dedab7a1df9a2de77ada7c64941e7275c"
   dependencies:
-    "@babel/plugin-syntax-do-expressions" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-export-default-from" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-export-default-from@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-export-default-from/-/plugin-proposal-export-default-from-7.0.0-beta.39.tgz#708146a7f8a3f71eedd9b9206437187d3ec50b43"
+"@babel/plugin-proposal-export-namespace-from@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-export-namespace-from/-/plugin-proposal-export-namespace-from-7.0.0-beta.41.tgz#57b2e7a89a1d30f41b5d5d07a69db7d4b5bbb59e"
   dependencies:
-    "@babel/plugin-syntax-export-default-from" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-export-namespace-from" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-export-namespace-from@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-export-namespace-from/-/plugin-proposal-export-namespace-from-7.0.0-beta.39.tgz#861ca8b83e2df981e5022193760e459a0c41300a"
+"@babel/plugin-proposal-function-bind@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-function-bind/-/plugin-proposal-function-bind-7.0.0-beta.41.tgz#5be8e03c3e75cc1a7ef7aae42e7f81859ca128c8"
   dependencies:
-    "@babel/plugin-syntax-export-namespace-from" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-function-bind" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-function-bind@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-function-bind/-/plugin-proposal-function-bind-7.0.0-beta.39.tgz#a5e6ad608b21427c4c2c99c3892cbb14211d1a66"
+"@babel/plugin-proposal-function-sent@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-function-sent/-/plugin-proposal-function-sent-7.0.0-beta.41.tgz#57d1ba376a0f60df31fb681aa88c260cf125ae5a"
   dependencies:
-    "@babel/plugin-syntax-function-bind" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/helper-wrap-function" "7.0.0-beta.41"
+    "@babel/plugin-syntax-function-sent" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-function-sent@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-function-sent/-/plugin-proposal-function-sent-7.0.0-beta.39.tgz#af6d2995f3157727b9afe49902a9ec35e0b28931"
+"@babel/plugin-proposal-logical-assignment-operators@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-logical-assignment-operators/-/plugin-proposal-logical-assignment-operators-7.0.0-beta.41.tgz#0aacb1f939dcc4f4c0e0e9924fd09d0fffaa7c59"
   dependencies:
-    "@babel/helper-wrap-function" "7.0.0-beta.39"
-    "@babel/plugin-syntax-function-sent" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-logical-assignment-operators" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-nullish-coalescing-operator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-nullish-coalescing-operator/-/plugin-proposal-nullish-coalescing-operator-7.0.0-beta.39.tgz#fa966be1d8ecf19b54c82bde4858ba3e8e330a51"
+"@babel/plugin-proposal-nullish-coalescing-operator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-nullish-coalescing-operator/-/plugin-proposal-nullish-coalescing-operator-7.0.0-beta.41.tgz#a0ccb74ac86b15df4cf418ec11d9131065dfd19e"
   dependencies:
-    "@babel/plugin-syntax-nullish-coalescing-operator" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-nullish-coalescing-operator" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-numeric-separator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-numeric-separator/-/plugin-proposal-numeric-separator-7.0.0-beta.39.tgz#781750e4d8f05c32dce7b37623e309f74bf13132"
+"@babel/plugin-proposal-numeric-separator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-numeric-separator/-/plugin-proposal-numeric-separator-7.0.0-beta.41.tgz#2caf59907e259f3feee78cea9427b218eabef80d"
   dependencies:
-    "@babel/plugin-syntax-numeric-separator" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-numeric-separator" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-object-rest-spread@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.0.0-beta.39.tgz#ea4d6ea974a364028e5074b1abe6505924d179a3"
+"@babel/plugin-proposal-object-rest-spread@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.0.0-beta.41.tgz#4c779ce64867f5b51f6a5178128d732573f96b0a"
   dependencies:
-    "@babel/plugin-syntax-object-rest-spread" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-object-rest-spread" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-optional-catch-binding@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-optional-catch-binding/-/plugin-proposal-optional-catch-binding-7.0.0-beta.39.tgz#1335778b3a8fc4289a2cfb518f85c6001ea5d9b4"
+"@babel/plugin-proposal-optional-catch-binding@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-optional-catch-binding/-/plugin-proposal-optional-catch-binding-7.0.0-beta.41.tgz#bed5b2dc81e4927714c333a278df16ecb3449813"
   dependencies:
-    "@babel/plugin-syntax-optional-catch-binding" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-optional-catch-binding" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-optional-chaining@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-optional-chaining/-/plugin-proposal-optional-chaining-7.0.0-beta.39.tgz#b4501f8252355df419c956c454b66619af41a5c4"
+"@babel/plugin-proposal-optional-chaining@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-optional-chaining/-/plugin-proposal-optional-chaining-7.0.0-beta.41.tgz#946f2a4d5f5736dd5fe110f8ccaf768f8edfa54e"
   dependencies:
-    "@babel/plugin-syntax-optional-chaining" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-optional-chaining" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-pipeline-operator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-pipeline-operator/-/plugin-proposal-pipeline-operator-7.0.0-beta.39.tgz#b81c30c3317dfc37d2fe602bbba54b5e9eb4faa2"
+"@babel/plugin-proposal-pipeline-operator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-pipeline-operator/-/plugin-proposal-pipeline-operator-7.0.0-beta.41.tgz#768273205d7755a946788057036ab292d79466a9"
   dependencies:
-    "@babel/plugin-syntax-pipeline-operator" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-pipeline-operator" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-throw-expressions@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-throw-expressions/-/plugin-proposal-throw-expressions-7.0.0-beta.39.tgz#f94092fe1b71453cd5040ea2e0b3a75600f4bc10"
+"@babel/plugin-proposal-throw-expressions@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-throw-expressions/-/plugin-proposal-throw-expressions-7.0.0-beta.41.tgz#9a59c319de2afc5116d4ffffdbb6246d3b218609"
   dependencies:
-    "@babel/plugin-syntax-throw-expressions" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-throw-expressions" "7.0.0-beta.41"
 
-"@babel/plugin-proposal-unicode-property-regex@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-unicode-property-regex/-/plugin-proposal-unicode-property-regex-7.0.0-beta.39.tgz#7b6748fb69f767f883838c3bbd2aa4d428c65cff"
+"@babel/plugin-proposal-unicode-property-regex@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-unicode-property-regex/-/plugin-proposal-unicode-property-regex-7.0.0-beta.41.tgz#ff2451178d4e90da4366c821f900f4eb8c6c90d0"
   dependencies:
-    "@babel/helper-regex" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/helper-regex" "7.0.0-beta.41"
     regexpu-core "^4.1.3"
 
-"@babel/plugin-syntax-async-generators@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-async-generators/-/plugin-syntax-async-generators-7.0.0-beta.39.tgz#ace93b8bb53e256a330b21d78304843fd6d72ab4"
+"@babel/plugin-syntax-async-generators@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-async-generators/-/plugin-syntax-async-generators-7.0.0-beta.41.tgz#a4ff2eff7491e9f93d92ca2b51a0ef6f966d98c0"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-class-properties@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-class-properties/-/plugin-syntax-class-properties-7.0.0-beta.39.tgz#a1a0e89c6042635cd21aafbdec3f006f06c368aa"
+"@babel/plugin-syntax-class-properties@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-class-properties/-/plugin-syntax-class-properties-7.0.0-beta.41.tgz#8ee660cf0115a1b9e24404acb6437bc58bf16be6"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-decorators@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-decorators/-/plugin-syntax-decorators-7.0.0-beta.39.tgz#7edaae1b4df9c2fafc9f8f0ce4b6ef3336cbc2a1"
+"@babel/plugin-syntax-decorators@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-decorators/-/plugin-syntax-decorators-7.0.0-beta.41.tgz#e9a81d320589b8a7d0fe2520ba57a93468eee25e"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-do-expressions@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-do-expressions/-/plugin-syntax-do-expressions-7.0.0-beta.39.tgz#3c185549a1b8c64d5a0bcb9809681c65511737df"
+"@babel/plugin-syntax-do-expressions@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-do-expressions/-/plugin-syntax-do-expressions-7.0.0-beta.41.tgz#e717b082cae97156d45bea78109b147ab6c21077"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-dynamic-import@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-dynamic-import/-/plugin-syntax-dynamic-import-7.0.0-beta.39.tgz#75c15750bc7df0d89d5d81dcf28cf84516b25e7c"
+"@babel/plugin-syntax-dynamic-import@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-dynamic-import/-/plugin-syntax-dynamic-import-7.0.0-beta.41.tgz#7e8b3d1c53171a451e50ff790e582aa2ac582c53"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-export-default-from@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-export-default-from/-/plugin-syntax-export-default-from-7.0.0-beta.39.tgz#e46deae4bc12fb008d3a6efef934fc837eb3cbe0"
+"@babel/plugin-syntax-export-default-from@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-export-default-from/-/plugin-syntax-export-default-from-7.0.0-beta.41.tgz#d49fb1e7be7ac519c25a5da56687103c00bbbeb2"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-export-namespace-from@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-export-namespace-from/-/plugin-syntax-export-namespace-from-7.0.0-beta.39.tgz#aa7b0b60c1c20250f89d09204c03fc67e3f9806c"
+"@babel/plugin-syntax-export-namespace-from@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-export-namespace-from/-/plugin-syntax-export-namespace-from-7.0.0-beta.41.tgz#79a22db141438f4cbb6707e010d6cc6bc67cb28c"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-flow@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-flow/-/plugin-syntax-flow-7.0.0-beta.39.tgz#b9247a81e4dacaa57aac3670792d788a64253f68"
+"@babel/plugin-syntax-flow@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-flow/-/plugin-syntax-flow-7.0.0-beta.41.tgz#5d5408faecd8cf5fd223cdcee32bbcf26db53dad"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-function-bind@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-function-bind/-/plugin-syntax-function-bind-7.0.0-beta.39.tgz#ad4a6604de10bc9579307089ecdd3451b963d21d"
+"@babel/plugin-syntax-function-bind@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-function-bind/-/plugin-syntax-function-bind-7.0.0-beta.41.tgz#d1dc6b508b77da0093c3ce12f2c289b3cb16464f"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-function-sent@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-function-sent/-/plugin-syntax-function-sent-7.0.0-beta.39.tgz#95a3b02e3a8484d4233f9479c14f7a2e960cee37"
+"@babel/plugin-syntax-function-sent@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-function-sent/-/plugin-syntax-function-sent-7.0.0-beta.41.tgz#fd2152c5b3c834b78b604e2c9dd54bbdad1f2b5f"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-import-meta@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-import-meta/-/plugin-syntax-import-meta-7.0.0-beta.39.tgz#56658e7487227ca7c350b67031c0e16ce987558d"
+"@babel/plugin-syntax-import-meta@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-import-meta/-/plugin-syntax-import-meta-7.0.0-beta.41.tgz#a225e7ae1806a1083e82b53fbcb7dd67338590cb"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-nullish-coalescing-operator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-nullish-coalescing-operator/-/plugin-syntax-nullish-coalescing-operator-7.0.0-beta.39.tgz#95f0937730ae77c8efa63189d0e47364bf23ceb4"
+"@babel/plugin-syntax-logical-assignment-operators@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-logical-assignment-operators/-/plugin-syntax-logical-assignment-operators-7.0.0-beta.41.tgz#b8e2a0a7441369a195d8af0b337333f9b9be893b"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-numeric-separator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-numeric-separator/-/plugin-syntax-numeric-separator-7.0.0-beta.39.tgz#347231ff2acf2479d38e4789a976c82c00d38818"
+"@babel/plugin-syntax-nullish-coalescing-operator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-nullish-coalescing-operator/-/plugin-syntax-nullish-coalescing-operator-7.0.0-beta.41.tgz#5406a412a0ddf6406b8faa9dd2fd742947a8e0ea"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-object-rest-spread@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-object-rest-spread/-/plugin-syntax-object-rest-spread-7.0.0-beta.39.tgz#f19f0761ccebf1d579197705e2efda36e1a45545"
+"@babel/plugin-syntax-numeric-separator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-numeric-separator/-/plugin-syntax-numeric-separator-7.0.0-beta.41.tgz#39fb60bbcc9d85782d53065fdc7438bd162b3732"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+
+"@babel/plugin-syntax-object-rest-spread@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-object-rest-spread/-/plugin-syntax-object-rest-spread-7.0.0-beta.41.tgz#e15b4ec0c9088f0ccd8f161c583545166a3df2c7"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-optional-catch-binding@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-optional-catch-binding/-/plugin-syntax-optional-catch-binding-7.0.0-beta.39.tgz#b6d3c27d2ceab69cfd132ba19a6d22fd37817fb2"
+"@babel/plugin-syntax-optional-catch-binding@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-optional-catch-binding/-/plugin-syntax-optional-catch-binding-7.0.0-beta.41.tgz#115df4798d408731aed14cba981d369d40a7700e"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-optional-chaining@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-optional-chaining/-/plugin-syntax-optional-chaining-7.0.0-beta.39.tgz#28c593e8921000c3f8ed749cdcab55b08824f988"
+"@babel/plugin-syntax-optional-chaining@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-optional-chaining/-/plugin-syntax-optional-chaining-7.0.0-beta.41.tgz#4db9b5c84140dfb8bfcbe6ec744161cd5d2ae465"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-pipeline-operator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-pipeline-operator/-/plugin-syntax-pipeline-operator-7.0.0-beta.39.tgz#765ec595f30cd4888bd80d347be1fe866801cbe8"
+"@babel/plugin-syntax-pipeline-operator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-pipeline-operator/-/plugin-syntax-pipeline-operator-7.0.0-beta.41.tgz#d523a05974ce01ae549ff98a8c5089db00c20f98"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-syntax-throw-expressions@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-throw-expressions/-/plugin-syntax-throw-expressions-7.0.0-beta.39.tgz#b93bb8d80b615d17bd7205c2dccfbdfd9ca7cdf0"
+"@babel/plugin-syntax-throw-expressions@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-throw-expressions/-/plugin-syntax-throw-expressions-7.0.0-beta.41.tgz#6b6522e8ee8207cd8c4497ac624a025381692dc0"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-arrow-functions@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-arrow-functions/-/plugin-transform-arrow-functions-7.0.0-beta.39.tgz#3e6b577392e009816c62a42fc97af10a95760a89"
+"@babel/plugin-transform-arrow-functions@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-arrow-functions/-/plugin-transform-arrow-functions-7.0.0-beta.41.tgz#0394aa76c3d0aa373d9085ce15a666ea3ff9d3b3"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-async-to-generator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-async-to-generator/-/plugin-transform-async-to-generator-7.0.0-beta.39.tgz#25d05e410b3f6f3106781318e10952cdc10ed9d8"
+"@babel/plugin-transform-async-to-generator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-async-to-generator/-/plugin-transform-async-to-generator-7.0.0-beta.41.tgz#f400c3a67b05b475cccc3d5319c71e48525346cc"
   dependencies:
-    "@babel/helper-module-imports" "7.0.0-beta.39"
-    "@babel/helper-remap-async-to-generator" "7.0.0-beta.39"
+    "@babel/helper-module-imports" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/helper-remap-async-to-generator" "7.0.0-beta.41"
 
-"@babel/plugin-transform-block-scoped-functions@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-block-scoped-functions/-/plugin-transform-block-scoped-functions-7.0.0-beta.39.tgz#aa1de36ba07a6c89b581c2c7d838a2821f014778"
+"@babel/plugin-transform-block-scoped-functions@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-block-scoped-functions/-/plugin-transform-block-scoped-functions-7.0.0-beta.41.tgz#cf149b92ed5cec02ed5874d290595a24d360ac07"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-block-scoping@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-block-scoping/-/plugin-transform-block-scoping-7.0.0-beta.39.tgz#44a6f10edc255f600c5616e55f9f48b5fe1ed5d9"
+"@babel/plugin-transform-block-scoping@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-block-scoping/-/plugin-transform-block-scoping-7.0.0-beta.41.tgz#0adba984d5332d879879f98204ff89e9f316905f"
   dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
     lodash "^4.2.0"
 
-"@babel/plugin-transform-classes@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-classes/-/plugin-transform-classes-7.0.0-beta.39.tgz#fe10e8cbcb6914c2b5cfa072d6ce8d9271f52a9c"
-  dependencies:
-    "@babel/helper-annotate-as-pure" "7.0.0-beta.39"
-    "@babel/helper-define-map" "7.0.0-beta.39"
-    "@babel/helper-function-name" "7.0.0-beta.39"
-    "@babel/helper-optimise-call-expression" "7.0.0-beta.39"
-    "@babel/helper-replace-supers" "7.0.0-beta.39"
+"@babel/plugin-transform-classes@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-classes/-/plugin-transform-classes-7.0.0-beta.41.tgz#bc5f1e1d7eb1c0a763cc912834f8cbaf4a12b31b"
+  dependencies:
+    "@babel/helper-annotate-as-pure" "7.0.0-beta.41"
+    "@babel/helper-define-map" "7.0.0-beta.41"
+    "@babel/helper-function-name" "7.0.0-beta.41"
+    "@babel/helper-optimise-call-expression" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/helper-replace-supers" "7.0.0-beta.41"
+    "@babel/helper-split-export-declaration" "7.0.0-beta.41"
     globals "^11.1.0"
 
-"@babel/plugin-transform-computed-properties@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-computed-properties/-/plugin-transform-computed-properties-7.0.0-beta.39.tgz#7cc5bf14050380adfe7d119be099e6fe56c0a044"
+"@babel/plugin-transform-computed-properties@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-computed-properties/-/plugin-transform-computed-properties-7.0.0-beta.41.tgz#16ec1978eba075aba847a9a5d9f469cba6dcc40a"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-destructuring@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-destructuring/-/plugin-transform-destructuring-7.0.0-beta.39.tgz#906cf55d8b5cbcd245634a128651397cbe6f0475"
+"@babel/plugin-transform-destructuring@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-destructuring/-/plugin-transform-destructuring-7.0.0-beta.41.tgz#057111be37ff7927a85acba5ef9aba93028c4bb5"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-dotall-regex@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-dotall-regex/-/plugin-transform-dotall-regex-7.0.0-beta.39.tgz#cb403b70bad7f302832bdbc8eeeb53832852ca5d"
+"@babel/plugin-transform-dotall-regex@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-dotall-regex/-/plugin-transform-dotall-regex-7.0.0-beta.41.tgz#0dc2f0411a11b2821caf0d7a1ca82c079cb35db5"
   dependencies:
-    "@babel/helper-regex" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/helper-regex" "7.0.0-beta.41"
     regexpu-core "^4.1.3"
 
-"@babel/plugin-transform-duplicate-keys@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-duplicate-keys/-/plugin-transform-duplicate-keys-7.0.0-beta.39.tgz#5c402995e883d186941e230277df7f89c552f961"
+"@babel/plugin-transform-duplicate-keys@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-duplicate-keys/-/plugin-transform-duplicate-keys-7.0.0-beta.41.tgz#8aa99958326aece8b2c6b9e6d75151445c732ce5"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-exponentiation-operator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-exponentiation-operator/-/plugin-transform-exponentiation-operator-7.0.0-beta.39.tgz#d0115ee85e3d895ead38c6fd149df223bde6e069"
+"@babel/plugin-transform-exponentiation-operator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-exponentiation-operator/-/plugin-transform-exponentiation-operator-7.0.0-beta.41.tgz#325fa6e2d53c9ee4e6757853c693a93a54ce0cdc"
   dependencies:
-    "@babel/helper-builder-binary-assignment-operator-visitor" "7.0.0-beta.39"
+    "@babel/helper-builder-binary-assignment-operator-visitor" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-flow-strip-types@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-flow-strip-types/-/plugin-transform-flow-strip-types-7.0.0-beta.39.tgz#3a03fc8ebaa9eddd62bdf501ceeff2a8e048bc4d"
+"@babel/plugin-transform-flow-strip-types@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-flow-strip-types/-/plugin-transform-flow-strip-types-7.0.0-beta.41.tgz#c20f1c79a0d5cc61866066c34f646daf768db66f"
   dependencies:
-    "@babel/plugin-syntax-flow" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-syntax-flow" "7.0.0-beta.41"
 
-"@babel/plugin-transform-for-of@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-for-of/-/plugin-transform-for-of-7.0.0-beta.39.tgz#77d11bcc9a21267c5848511431ad28b1aa1401db"
+"@babel/plugin-transform-for-of@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-for-of/-/plugin-transform-for-of-7.0.0-beta.41.tgz#5f3519a5ffcca00eaa07f1c0faa83f35319fbff7"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-function-name@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-function-name/-/plugin-transform-function-name-7.0.0-beta.39.tgz#c677d2cb90462b12fec9ce6e9972524a253340f9"
+"@babel/plugin-transform-function-name@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-function-name/-/plugin-transform-function-name-7.0.0-beta.41.tgz#700bd4414fe43d789eaad7b608ad83f789deb90f"
   dependencies:
-    "@babel/helper-function-name" "7.0.0-beta.39"
+    "@babel/helper-function-name" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-literals@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-literals/-/plugin-transform-literals-7.0.0-beta.39.tgz#5c6a097539a5d20cc285e97d785d418d6aad305d"
+"@babel/plugin-transform-literals@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-literals/-/plugin-transform-literals-7.0.0-beta.41.tgz#64cd9505667e48acd17f89ccb04118e2e8f74315"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-modules-amd@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-modules-amd/-/plugin-transform-modules-amd-7.0.0-beta.39.tgz#130bb5c05411d5be7d17ff7d2740058298fa23c3"
+"@babel/plugin-transform-modules-amd@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-modules-amd/-/plugin-transform-modules-amd-7.0.0-beta.41.tgz#e24c47638b95b7d60a5390f2a7eca0c6d68642fe"
   dependencies:
-    "@babel/helper-module-transforms" "7.0.0-beta.39"
+    "@babel/helper-module-transforms" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-modules-commonjs@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-modules-commonjs/-/plugin-transform-modules-commonjs-7.0.0-beta.39.tgz#b946992db6883b633500231950cdbae19dcaf334"
+"@babel/plugin-transform-modules-commonjs@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-modules-commonjs/-/plugin-transform-modules-commonjs-7.0.0-beta.41.tgz#df49c63a95021b15c810c8a3277f72273b047981"
   dependencies:
-    "@babel/helper-module-transforms" "7.0.0-beta.39"
-    "@babel/helper-simple-access" "7.0.0-beta.39"
+    "@babel/helper-module-transforms" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/helper-simple-access" "7.0.0-beta.41"
 
-"@babel/plugin-transform-modules-systemjs@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-modules-systemjs/-/plugin-transform-modules-systemjs-7.0.0-beta.39.tgz#3ec4ba068077ac618e106273bb9636b2ee467406"
+"@babel/plugin-transform-modules-systemjs@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-modules-systemjs/-/plugin-transform-modules-systemjs-7.0.0-beta.41.tgz#f4159e05c1f82994be1e82e351a4edfe83354ac7"
   dependencies:
-    "@babel/helper-hoist-variables" "7.0.0-beta.39"
+    "@babel/helper-hoist-variables" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-modules-umd@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-modules-umd/-/plugin-transform-modules-umd-7.0.0-beta.39.tgz#25a68675091c39a5fbf72e0d76870f3b248d452e"
+"@babel/plugin-transform-modules-umd@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-modules-umd/-/plugin-transform-modules-umd-7.0.0-beta.41.tgz#ba74d9d23e7c4c7f74959226ccacb4e57c57ba57"
   dependencies:
-    "@babel/helper-module-transforms" "7.0.0-beta.39"
+    "@babel/helper-module-transforms" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-new-target@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-new-target/-/plugin-transform-new-target-7.0.0-beta.39.tgz#deaf7e20bb67f8b8ea6fdd4b2b4c51867d450c0a"
+"@babel/plugin-transform-new-target@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-new-target/-/plugin-transform-new-target-7.0.0-beta.41.tgz#c0d4549ac4c740bbd4595ae5bee7ab7d959e3ef3"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-object-super@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-object-super/-/plugin-transform-object-super-7.0.0-beta.39.tgz#4db6dfffe5b70bdb068ecc5c69394aef24b85d8d"
+"@babel/plugin-transform-object-super@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-object-super/-/plugin-transform-object-super-7.0.0-beta.41.tgz#0fe352a9136431803778797ef5093b0df43c8057"
   dependencies:
-    "@babel/helper-replace-supers" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/helper-replace-supers" "7.0.0-beta.41"
 
-"@babel/plugin-transform-parameters@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-parameters/-/plugin-transform-parameters-7.0.0-beta.39.tgz#bcd6f99c7839f52fce3bd05e89841d187f1d4ef8"
+"@babel/plugin-transform-parameters@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-parameters/-/plugin-transform-parameters-7.0.0-beta.41.tgz#9a46ae4fe623b394a81dfddf465dc723730e2a46"
   dependencies:
-    "@babel/helper-call-delegate" "7.0.0-beta.39"
-    "@babel/helper-get-function-arity" "7.0.0-beta.39"
+    "@babel/helper-call-delegate" "7.0.0-beta.41"
+    "@babel/helper-get-function-arity" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-regenerator@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-regenerator/-/plugin-transform-regenerator-7.0.0-beta.39.tgz#6f85c3ac987824fe037fc83dcda75c4d7502344c"
+"@babel/plugin-transform-regenerator@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-regenerator/-/plugin-transform-regenerator-7.0.0-beta.41.tgz#1b376823ea0b3b357b4ff605a256cfa001017608"
   dependencies:
     regenerator-transform "^0.12.3"
 
-"@babel/plugin-transform-shorthand-properties@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-shorthand-properties/-/plugin-transform-shorthand-properties-7.0.0-beta.39.tgz#caa480ecb159481df8e1c405aaac865a54781630"
+"@babel/plugin-transform-shorthand-properties@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-shorthand-properties/-/plugin-transform-shorthand-properties-7.0.0-beta.41.tgz#93431505f2ea38245a0e7f4e7055253b240e49ca"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-spread@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-spread/-/plugin-transform-spread-7.0.0-beta.39.tgz#75358c67a52cc2cc266ea598dc0447e0f4e239d7"
+"@babel/plugin-transform-spread@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-spread/-/plugin-transform-spread-7.0.0-beta.41.tgz#88c11a4854c0e274d74a091c5605721b6b05fc45"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-sticky-regex@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-sticky-regex/-/plugin-transform-sticky-regex-7.0.0-beta.39.tgz#9e989e99efb9dc84928507adb260934f2e336713"
+"@babel/plugin-transform-sticky-regex@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-sticky-regex/-/plugin-transform-sticky-regex-7.0.0-beta.41.tgz#00a204ee9719c33d8a8c96526de4ec908084aacb"
   dependencies:
-    "@babel/helper-regex" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/helper-regex" "7.0.0-beta.41"
 
-"@babel/plugin-transform-template-literals@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-template-literals/-/plugin-transform-template-literals-7.0.0-beta.39.tgz#65b06d42ed0f04f18aeb45bc7a588db7783cc7d1"
+"@babel/plugin-transform-template-literals@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-template-literals/-/plugin-transform-template-literals-7.0.0-beta.41.tgz#03bdb3fab54784dd754c32aa8a6d122d9d9caafa"
   dependencies:
-    "@babel/helper-annotate-as-pure" "7.0.0-beta.39"
+    "@babel/helper-annotate-as-pure" "7.0.0-beta.41"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-typeof-symbol@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-typeof-symbol/-/plugin-transform-typeof-symbol-7.0.0-beta.39.tgz#ac2134df64e014e864f7678e46770ecd13f604e9"
+"@babel/plugin-transform-typeof-symbol@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-typeof-symbol/-/plugin-transform-typeof-symbol-7.0.0-beta.41.tgz#954ed7a16170d17c1928ab9cd52667011d69ab12"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
 
-"@babel/plugin-transform-unicode-regex@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-unicode-regex/-/plugin-transform-unicode-regex-7.0.0-beta.39.tgz#cbfd3e78bb7ce04597cbde55b177f8b61b6b20b3"
+"@babel/plugin-transform-unicode-regex@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-unicode-regex/-/plugin-transform-unicode-regex-7.0.0-beta.41.tgz#20011f4f7b45b539516566b792668b9faf706638"
   dependencies:
-    "@babel/helper-regex" "7.0.0-beta.39"
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/helper-regex" "7.0.0-beta.41"
     regexpu-core "^4.1.3"
 
-"@babel/preset-env@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.0.0-beta.39.tgz#3977e2d4dc7d196b07bb3bd23fb18bc280b20fa3"
-  dependencies:
-    "@babel/plugin-proposal-async-generator-functions" "7.0.0-beta.39"
-    "@babel/plugin-proposal-object-rest-spread" "7.0.0-beta.39"
-    "@babel/plugin-proposal-optional-catch-binding" "7.0.0-beta.39"
-    "@babel/plugin-proposal-unicode-property-regex" "7.0.0-beta.39"
-    "@babel/plugin-syntax-async-generators" "7.0.0-beta.39"
-    "@babel/plugin-syntax-object-rest-spread" "7.0.0-beta.39"
-    "@babel/plugin-syntax-optional-catch-binding" "7.0.0-beta.39"
-    "@babel/plugin-transform-arrow-functions" "7.0.0-beta.39"
-    "@babel/plugin-transform-async-to-generator" "7.0.0-beta.39"
-    "@babel/plugin-transform-block-scoped-functions" "7.0.0-beta.39"
-    "@babel/plugin-transform-block-scoping" "7.0.0-beta.39"
-    "@babel/plugin-transform-classes" "7.0.0-beta.39"
-    "@babel/plugin-transform-computed-properties" "7.0.0-beta.39"
-    "@babel/plugin-transform-destructuring" "7.0.0-beta.39"
-    "@babel/plugin-transform-dotall-regex" "7.0.0-beta.39"
-    "@babel/plugin-transform-duplicate-keys" "7.0.0-beta.39"
-    "@babel/plugin-transform-exponentiation-operator" "7.0.0-beta.39"
-    "@babel/plugin-transform-for-of" "7.0.0-beta.39"
-    "@babel/plugin-transform-function-name" "7.0.0-beta.39"
-    "@babel/plugin-transform-literals" "7.0.0-beta.39"
-    "@babel/plugin-transform-modules-amd" "7.0.0-beta.39"
-    "@babel/plugin-transform-modules-commonjs" "7.0.0-beta.39"
-    "@babel/plugin-transform-modules-systemjs" "7.0.0-beta.39"
-    "@babel/plugin-transform-modules-umd" "7.0.0-beta.39"
-    "@babel/plugin-transform-new-target" "7.0.0-beta.39"
-    "@babel/plugin-transform-object-super" "7.0.0-beta.39"
-    "@babel/plugin-transform-parameters" "7.0.0-beta.39"
-    "@babel/plugin-transform-regenerator" "7.0.0-beta.39"
-    "@babel/plugin-transform-shorthand-properties" "7.0.0-beta.39"
-    "@babel/plugin-transform-spread" "7.0.0-beta.39"
-    "@babel/plugin-transform-sticky-regex" "7.0.0-beta.39"
-    "@babel/plugin-transform-template-literals" "7.0.0-beta.39"
-    "@babel/plugin-transform-typeof-symbol" "7.0.0-beta.39"
-    "@babel/plugin-transform-unicode-regex" "7.0.0-beta.39"
-    browserslist "^2.4.0"
+"@babel/preset-env@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.0.0-beta.41.tgz#b9638878277eba78659ec75e00c30ac09079d8f0"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-proposal-async-generator-functions" "7.0.0-beta.41"
+    "@babel/plugin-proposal-object-rest-spread" "7.0.0-beta.41"
+    "@babel/plugin-proposal-optional-catch-binding" "7.0.0-beta.41"
+    "@babel/plugin-proposal-unicode-property-regex" "7.0.0-beta.41"
+    "@babel/plugin-syntax-async-generators" "7.0.0-beta.41"
+    "@babel/plugin-syntax-object-rest-spread" "7.0.0-beta.41"
+    "@babel/plugin-syntax-optional-catch-binding" "7.0.0-beta.41"
+    "@babel/plugin-transform-arrow-functions" "7.0.0-beta.41"
+    "@babel/plugin-transform-async-to-generator" "7.0.0-beta.41"
+    "@babel/plugin-transform-block-scoped-functions" "7.0.0-beta.41"
+    "@babel/plugin-transform-block-scoping" "7.0.0-beta.41"
+    "@babel/plugin-transform-classes" "7.0.0-beta.41"
+    "@babel/plugin-transform-computed-properties" "7.0.0-beta.41"
+    "@babel/plugin-transform-destructuring" "7.0.0-beta.41"
+    "@babel/plugin-transform-dotall-regex" "7.0.0-beta.41"
+    "@babel/plugin-transform-duplicate-keys" "7.0.0-beta.41"
+    "@babel/plugin-transform-exponentiation-operator" "7.0.0-beta.41"
+    "@babel/plugin-transform-for-of" "7.0.0-beta.41"
+    "@babel/plugin-transform-function-name" "7.0.0-beta.41"
+    "@babel/plugin-transform-literals" "7.0.0-beta.41"
+    "@babel/plugin-transform-modules-amd" "7.0.0-beta.41"
+    "@babel/plugin-transform-modules-commonjs" "7.0.0-beta.41"
+    "@babel/plugin-transform-modules-systemjs" "7.0.0-beta.41"
+    "@babel/plugin-transform-modules-umd" "7.0.0-beta.41"
+    "@babel/plugin-transform-new-target" "7.0.0-beta.41"
+    "@babel/plugin-transform-object-super" "7.0.0-beta.41"
+    "@babel/plugin-transform-parameters" "7.0.0-beta.41"
+    "@babel/plugin-transform-regenerator" "7.0.0-beta.41"
+    "@babel/plugin-transform-shorthand-properties" "7.0.0-beta.41"
+    "@babel/plugin-transform-spread" "7.0.0-beta.41"
+    "@babel/plugin-transform-sticky-regex" "7.0.0-beta.41"
+    "@babel/plugin-transform-template-literals" "7.0.0-beta.41"
+    "@babel/plugin-transform-typeof-symbol" "7.0.0-beta.41"
+    "@babel/plugin-transform-unicode-regex" "7.0.0-beta.41"
+    browserslist "^3.0.0"
     invariant "^2.2.2"
     semver "^5.3.0"
 
-"@babel/preset-flow@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/preset-flow/-/preset-flow-7.0.0-beta.39.tgz#2a104114c71fbce992af0ed6ba633ac8f1be7277"
-  dependencies:
-    "@babel/plugin-transform-flow-strip-types" "7.0.0-beta.39"
-
-"@babel/preset-stage-0@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/preset-stage-0/-/preset-stage-0-7.0.0-beta.39.tgz#ac56ef8988c282166303ede27e8d6ef5d9c29533"
-  dependencies:
-    "@babel/plugin-proposal-function-bind" "7.0.0-beta.39"
-    "@babel/preset-stage-1" "7.0.0-beta.39"
-
-"@babel/preset-stage-1@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/preset-stage-1/-/preset-stage-1-7.0.0-beta.39.tgz#b0a38c47a4683974433c79214a077162540c2cd4"
-  dependencies:
-    "@babel/plugin-proposal-decorators" "7.0.0-beta.39"
-    "@babel/plugin-proposal-do-expressions" "7.0.0-beta.39"
-    "@babel/plugin-proposal-export-default-from" "7.0.0-beta.39"
-    "@babel/plugin-proposal-nullish-coalescing-operator" "7.0.0-beta.39"
-    "@babel/plugin-proposal-optional-chaining" "7.0.0-beta.39"
-    "@babel/plugin-proposal-pipeline-operator" "7.0.0-beta.39"
-    "@babel/preset-stage-2" "7.0.0-beta.39"
-
-"@babel/preset-stage-2@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/preset-stage-2/-/preset-stage-2-7.0.0-beta.39.tgz#dc537fe1d822ec96d07e1c5659dc6635fc5cc130"
-  dependencies:
-    "@babel/plugin-proposal-export-namespace-from" "7.0.0-beta.39"
-    "@babel/plugin-proposal-function-sent" "7.0.0-beta.39"
-    "@babel/plugin-proposal-numeric-separator" "7.0.0-beta.39"
-    "@babel/plugin-proposal-throw-expressions" "7.0.0-beta.39"
-    "@babel/preset-stage-3" "7.0.0-beta.39"
-
-"@babel/preset-stage-3@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/preset-stage-3/-/preset-stage-3-7.0.0-beta.39.tgz#30a313d79369aa1b4d6652ae621dc1d162255ac9"
-  dependencies:
-    "@babel/plugin-proposal-async-generator-functions" "7.0.0-beta.39"
-    "@babel/plugin-proposal-class-properties" "7.0.0-beta.39"
-    "@babel/plugin-proposal-object-rest-spread" "7.0.0-beta.39"
-    "@babel/plugin-proposal-optional-catch-binding" "7.0.0-beta.39"
-    "@babel/plugin-proposal-unicode-property-regex" "7.0.0-beta.39"
-    "@babel/plugin-syntax-dynamic-import" "7.0.0-beta.39"
-    "@babel/plugin-syntax-import-meta" "7.0.0-beta.39"
-
-"@babel/register@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/register/-/register-7.0.0-beta.39.tgz#40994219d69963a88c55e259e32fd076cdd668dc"
+"@babel/preset-flow@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/preset-flow/-/preset-flow-7.0.0-beta.41.tgz#f33914a40fd8578ad0b8dae7acd8bac5b4aa444f"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-transform-flow-strip-types" "7.0.0-beta.41"
+
+"@babel/preset-stage-0@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/preset-stage-0/-/preset-stage-0-7.0.0-beta.41.tgz#47a259ceae93a600cb59e1ab7c46c089cf89d9c6"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-proposal-function-bind" "7.0.0-beta.41"
+    "@babel/plugin-proposal-logical-assignment-operators" "7.0.0-beta.41"
+    "@babel/preset-stage-1" "7.0.0-beta.41"
+
+"@babel/preset-stage-1@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/preset-stage-1/-/preset-stage-1-7.0.0-beta.41.tgz#ac3bfe383578dda47782ec3c8ec7818c9ca350a5"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-proposal-decorators" "7.0.0-beta.41"
+    "@babel/plugin-proposal-do-expressions" "7.0.0-beta.41"
+    "@babel/plugin-proposal-export-default-from" "7.0.0-beta.41"
+    "@babel/plugin-proposal-nullish-coalescing-operator" "7.0.0-beta.41"
+    "@babel/plugin-proposal-optional-chaining" "7.0.0-beta.41"
+    "@babel/plugin-proposal-pipeline-operator" "7.0.0-beta.41"
+    "@babel/preset-stage-2" "7.0.0-beta.41"
+
+"@babel/preset-stage-2@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/preset-stage-2/-/preset-stage-2-7.0.0-beta.41.tgz#c03a746f54e761d4014568b97c7a5bcebe15d4ab"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-proposal-export-namespace-from" "7.0.0-beta.41"
+    "@babel/plugin-proposal-function-sent" "7.0.0-beta.41"
+    "@babel/plugin-proposal-numeric-separator" "7.0.0-beta.41"
+    "@babel/plugin-proposal-throw-expressions" "7.0.0-beta.41"
+    "@babel/preset-stage-3" "7.0.0-beta.41"
+
+"@babel/preset-stage-3@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/preset-stage-3/-/preset-stage-3-7.0.0-beta.41.tgz#2fbc17609c8ea14262cc4c7f8a4d76f7f98b14f5"
+  dependencies:
+    "@babel/helper-plugin-utils" "7.0.0-beta.41"
+    "@babel/plugin-proposal-async-generator-functions" "7.0.0-beta.41"
+    "@babel/plugin-proposal-class-properties" "7.0.0-beta.41"
+    "@babel/plugin-proposal-object-rest-spread" "7.0.0-beta.41"
+    "@babel/plugin-proposal-optional-catch-binding" "7.0.0-beta.41"
+    "@babel/plugin-proposal-unicode-property-regex" "7.0.0-beta.41"
+    "@babel/plugin-syntax-dynamic-import" "7.0.0-beta.41"
+    "@babel/plugin-syntax-import-meta" "7.0.0-beta.41"
+
+"@babel/register@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/register/-/register-7.0.0-beta.41.tgz#0df0ea8431607ba1a12187efaf472314ca6d6518"
   dependencies:
     core-js "^2.5.3"
     find-cache-dir "^1.0.0"
@@ -666,93 +786,72 @@
     pirates "^3.0.1"
     source-map-support "^0.4.2"
 
-"@babel/template@7.0.0-beta.36":
-  version "7.0.0-beta.36"
-  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.0.0-beta.36.tgz#02e903de5d68bd7899bce3c5b5447e59529abb00"
-  dependencies:
-    "@babel/code-frame" "7.0.0-beta.36"
-    "@babel/types" "7.0.0-beta.36"
-    babylon "7.0.0-beta.36"
-    lodash "^4.2.0"
-
-"@babel/template@7.0.0-beta.38":
-  version "7.0.0-beta.38"
-  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.0.0-beta.38.tgz#8a2d403a01da320beb8333dc6403500fa79e8597"
+"@babel/template@7.0.0-beta.40":
+  version "7.0.0-beta.40"
+  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.0.0-beta.40.tgz#034988c6424eb5c3268fe6a608626de1f4410fc8"
   dependencies:
-    "@babel/code-frame" "7.0.0-beta.38"
-    "@babel/types" "7.0.0-beta.38"
-    babylon "7.0.0-beta.38"
+    "@babel/code-frame" "7.0.0-beta.40"
+    "@babel/types" "7.0.0-beta.40"
+    babylon "7.0.0-beta.40"
     lodash "^4.2.0"
 
-"@babel/template@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.0.0-beta.39.tgz#98bd7b132d99f73547c473f2862f481ae84981c9"
+"@babel/template@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.0.0-beta.41.tgz#628eeb93f9b5b423a252d3b6183f12e09505ab55"
   dependencies:
-    "@babel/code-frame" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
-    babylon "7.0.0-beta.39"
+    "@babel/code-frame" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
+    babylon "7.0.0-beta.41"
     lodash "^4.2.0"
 
-"@babel/traverse@7.0.0-beta.36":
-  version "7.0.0-beta.36"
-  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.0.0-beta.36.tgz#1dc6f8750e89b6b979de5fe44aa993b1a2192261"
+"@babel/traverse@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.0.0-beta.41.tgz#1615f6fa87382c34511be8be1cd083eba9b1ae88"
   dependencies:
-    "@babel/code-frame" "7.0.0-beta.36"
-    "@babel/helper-function-name" "7.0.0-beta.36"
-    "@babel/types" "7.0.0-beta.36"
-    babylon "7.0.0-beta.36"
-    debug "^3.0.1"
-    globals "^11.1.0"
-    invariant "^2.2.0"
-    lodash "^4.2.0"
-
-"@babel/traverse@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.0.0-beta.39.tgz#ccb5abfb878403a39af249997dd6f36136de7694"
-  dependencies:
-    "@babel/code-frame" "7.0.0-beta.39"
-    "@babel/generator" "7.0.0-beta.39"
-    "@babel/helper-function-name" "7.0.0-beta.39"
-    "@babel/types" "7.0.0-beta.39"
-    babylon "7.0.0-beta.39"
-    debug "^3.0.1"
+    "@babel/code-frame" "7.0.0-beta.41"
+    "@babel/generator" "7.0.0-beta.41"
+    "@babel/helper-function-name" "7.0.0-beta.41"
+    "@babel/helper-split-export-declaration" "7.0.0-beta.41"
+    "@babel/types" "7.0.0-beta.41"
+    babylon "7.0.0-beta.41"
+    debug "^3.1.0"
     globals "^11.1.0"
     invariant "^2.2.0"
     lodash "^4.2.0"
 
-"@babel/traverse@^7.0.0-beta.31":
-  version "7.0.0-beta.38"
-  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.0.0-beta.38.tgz#56462b91753dd5c6faf36e56a77c64077ddb85b8"
+"@babel/traverse@^7.0.0-beta.31", "@babel/traverse@^7.0.0-beta.40":
+  version "7.0.0-beta.40"
+  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.0.0-beta.40.tgz#d140e449b2e093ef9fe1a2eecc28421ffb4e521e"
   dependencies:
-    "@babel/code-frame" "7.0.0-beta.38"
-    "@babel/generator" "7.0.0-beta.38"
-    "@babel/helper-function-name" "7.0.0-beta.38"
-    "@babel/types" "7.0.0-beta.38"
-    babylon "7.0.0-beta.38"
+    "@babel/code-frame" "7.0.0-beta.40"
+    "@babel/generator" "7.0.0-beta.40"
+    "@babel/helper-function-name" "7.0.0-beta.40"
+    "@babel/types" "7.0.0-beta.40"
+    babylon "7.0.0-beta.40"
     debug "^3.0.1"
     globals "^11.1.0"
     invariant "^2.2.0"
     lodash "^4.2.0"
 
-"@babel/types@7.0.0-beta.36":
-  version "7.0.0-beta.36"
-  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.0.0-beta.36.tgz#64f2004353de42adb72f9ebb4665fc35b5499d23"
+"@babel/types@7.0.0-beta.35":
+  version "7.0.0-beta.35"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.0.0-beta.35.tgz#cf933a9a9a38484ca724b335b88d83726d5ab960"
   dependencies:
     esutils "^2.0.2"
     lodash "^4.2.0"
     to-fast-properties "^2.0.0"
 
-"@babel/types@7.0.0-beta.38":
-  version "7.0.0-beta.38"
-  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.0.0-beta.38.tgz#2ce2443f7dc6ad535a67db4940cbd34e64035a6f"
+"@babel/types@7.0.0-beta.40", "@babel/types@^7.0.0-beta.40":
+  version "7.0.0-beta.40"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.0.0-beta.40.tgz#25c3d7aae14126abe05fcb098c65a66b6d6b8c14"
   dependencies:
     esutils "^2.0.2"
     lodash "^4.2.0"
     to-fast-properties "^2.0.0"
 
-"@babel/types@7.0.0-beta.39":
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.0.0-beta.39.tgz#2ea0d97efe4781688751edc68cde640d6559938c"
+"@babel/types@7.0.0-beta.41":
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.0.0-beta.41.tgz#776e6ec154fb8ec11da697be35b705c6eeb00e75"
   dependencies:
     esutils "^2.0.2"
     lodash "^4.2.0"
@@ -792,20 +891,20 @@
   resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.35.tgz#8999974b34028686a8d61a719e61c138d3755107"
 
 "@types/lodash@^4.14.67":
-  version "4.14.92"
-  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.92.tgz#6e3cb0b71a1e12180a47a42a744e856c3ae99a57"
+  version "4.14.104"
+  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.104.tgz#53ee2357fa2e6e68379341d92eb2ecea4b11bb80"
 
 "@types/node@*":
-  version "9.3.0"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-9.3.0.tgz#3a129cda7c4e5df2409702626892cb4b96546dd5"
+  version "9.4.6"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-9.4.6.tgz#d8176d864ee48753d053783e4e463aec86b8d82e"
 
 "@types/node@^8.0.0":
-  version "8.5.9"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.5.9.tgz#7155cfb4ae405bca4dd8df1a214c339e939109bf"
+  version "8.9.4"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.9.4.tgz#dfd327582a06c114eb6e0441fa3d6fab35edad48"
 
 "@types/semver@^5.3.32":
-  version "5.4.0"
-  resolved "https://registry.yarnpkg.com/@types/semver/-/semver-5.4.0.tgz#f3658535af7f1f502acd6da7daf405ffeb1f7ee4"
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/@types/semver/-/semver-5.5.0.tgz#146c2a29ee7d3bae4bf2fcb274636e264c813c45"
 
 "@types/tapable@*":
   version "0.2.4"
@@ -818,12 +917,13 @@
     source-map "^0.6.1"
 
 "@types/webpack@^3.0.0":
-  version "3.8.3"
-  resolved "https://registry.yarnpkg.com/@types/webpack/-/webpack-3.8.3.tgz#92501a9c7e41a560aa9b354345768b7348d80764"
+  version "3.8.8"
+  resolved "https://registry.yarnpkg.com/@types/webpack/-/webpack-3.8.8.tgz#fd9483edf2d6935eaab52aa530b1f737c188cd9a"
   dependencies:
     "@types/node" "*"
     "@types/tapable" "*"
     "@types/uglify-js" "*"
+    source-map "^0.6.0"
 
 JSONStream@^1.0.3, JSONStream@^1.0.4:
   version "1.3.2"
@@ -832,6 +932,10 @@ JSONStream@^1.0.3, JSONStream@^1.0.4:
     jsonparse "^1.2.0"
     through ">=2.2.7 <3"
 
+abab@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/abab/-/abab-1.0.4.tgz#5faad9c2c07f60dd76770f71cf025b62a63cfd4e"
+
 abbrev@1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
@@ -842,12 +946,25 @@ acorn-dynamic-import@^2.0.0:
   dependencies:
     acorn "^4.0.3"
 
+acorn-globals@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/acorn-globals/-/acorn-globals-4.1.0.tgz#ab716025dbe17c54d3ef81d32ece2b2d99fe2538"
+  dependencies:
+    acorn "^5.0.0"
+
 acorn-jsx@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-3.0.1.tgz#afdf9488fb1ecefc8348f6fb22f464e32a58b36b"
   dependencies:
     acorn "^3.0.4"
 
+acorn-node@^1.2.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/acorn-node/-/acorn-node-1.3.0.tgz#5f86d73346743810ef1269b901dbcbded020861b"
+  dependencies:
+    acorn "^5.4.1"
+    xtend "^4.0.1"
+
 acorn@^3.0.4:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-3.3.0.tgz#45e37fb39e8da3f25baee3ff5369e2bb5f22017a"
@@ -856,18 +973,22 @@ acorn@^4.0.3:
   version "4.0.13"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-4.0.13.tgz#105495ae5361d697bd195c825192e1ad7f253787"
 
-acorn@^5.0.0, acorn@^5.0.3, acorn@^5.2.1:
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.3.0.tgz#7446d39459c54fb49a80e6ee6478149b940ec822"
+acorn@^5.0.0, acorn@^5.0.3, acorn@^5.2.1, acorn@^5.3.0, acorn@^5.4.1, acorn@^5.5.0:
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.5.0.tgz#1abb587fbf051f94e3de20e6b26ef910b1828298"
 
 add-stream@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/add-stream/-/add-stream-1.0.0.tgz#6a7990437ca736d5e1288db92bd3266d5f5cb2aa"
 
-ajv-keywords@^2.0.0, ajv-keywords@^2.1.0:
+ajv-keywords@^2.1.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-2.1.1.tgz#617997fc5f60576894c435f940d819e135b80762"
 
+ajv-keywords@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.1.0.tgz#ac2b27939c543e95d2c06e7f7f5c27be4aa543be"
+
 ajv@^4.9.1:
   version "4.11.8"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-4.11.8.tgz#82ffb02b29e662ae53bdc20af15947706739c536"
@@ -875,7 +996,7 @@ ajv@^4.9.1:
     co "^4.6.0"
     json-stable-stringify "^1.0.1"
 
-ajv@^5.1.5, ajv@^5.2.3, ajv@^5.3.0:
+ajv@^5.1.0, ajv@^5.2.3, ajv@^5.3.0:
   version "5.5.2"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-5.5.2.tgz#73b5eeca3fab653e3d3f9422b341ad42205dc965"
   dependencies:
@@ -884,6 +1005,14 @@ ajv@^5.1.5, ajv@^5.2.3, ajv@^5.3.0:
     fast-json-stable-stringify "^2.0.0"
     json-schema-traverse "^0.3.0"
 
+ajv@^6.1.0:
+  version "6.2.1"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.2.1.tgz#28a6abc493a2abe0fb4c8507acaedb43fa550671"
+  dependencies:
+    fast-deep-equal "^1.0.0"
+    fast-json-stable-stringify "^2.0.0"
+    json-schema-traverse "^0.3.0"
+
 align-text@^0.1.1, align-text@^0.1.3:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/align-text/-/align-text-0.1.4.tgz#0cd90a561093f35d0a99256c22b7069433fad117"
@@ -896,6 +1025,12 @@ amdefine@>=0.0.4:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"
 
+ansi-colors@^1.0.1:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/ansi-colors/-/ansi-colors-1.1.0.tgz#6374b4dd5d4718ff3ce27a671a3b1cad077132a9"
+  dependencies:
+    ansi-wrap "^0.1.0"
+
 ansi-cyan@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/ansi-cyan/-/ansi-cyan-0.1.1.tgz#538ae528af8982f28ae30d86f2f17456d2609873"
@@ -934,13 +1069,13 @@ ansi-styles@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-2.2.1.tgz#b432dd3358b634cf75e1e4664368240533c1ddbe"
 
-ansi-styles@^3.1.0, ansi-styles@^3.2.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.0.tgz#c159b8d5be0f9e5a6f346dab94f16ce022161b88"
+ansi-styles@^3.2.0, ansi-styles@^3.2.1:
+  version "3.2.1"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.1.tgz#41fbb20243e50b12be0f04b8dedbf07520ce841d"
   dependencies:
     color-convert "^1.9.0"
 
-ansi-wrap@0.1.0:
+ansi-wrap@0.1.0, ansi-wrap@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/ansi-wrap/-/ansi-wrap-0.1.0.tgz#a82250ddb0015e9a27ca82e82ea603bbfa45efaf"
 
@@ -955,6 +1090,13 @@ anymatch@^1.3.0:
     micromatch "^2.1.5"
     normalize-path "^2.0.0"
 
+anymatch@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-2.0.0.tgz#bcb24b4f37934d9aa7ac17b4adaf89e7c76ef2eb"
+  dependencies:
+    micromatch "^3.1.4"
+    normalize-path "^2.1.1"
+
 app-root-path@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/app-root-path/-/app-root-path-2.0.1.tgz#cd62dcf8e4fd5a417efc664d2e5b10653c651b46"
@@ -981,8 +1123,8 @@ are-we-there-yet@~1.1.2:
     readable-stream "^2.0.6"
 
 argparse@^1.0.7:
-  version "1.0.9"
-  resolved "https://registry.yarnpkg.com/argparse/-/argparse-1.0.9.tgz#73d83bc263f86e97f8cc4f6bae1b0e90a7d22c86"
+  version "1.0.10"
+  resolved "https://registry.yarnpkg.com/argparse/-/argparse-1.0.10.tgz#bcd6791ea5ae09725e17e5ad988134cd40b3d911"
   dependencies:
     sprintf-js "~1.0.2"
 
@@ -1023,6 +1165,10 @@ array-each@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/array-each/-/array-each-1.0.1.tgz#a794af0c05ab1752846ee753a1f211a05ba0c44f"
 
+array-equal@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/array-equal/-/array-equal-1.0.0.tgz#8c2a5ef2472fd9ea742b04c77a75093ba2757c93"
+
 array-filter@~0.0.0:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/array-filter/-/array-filter-0.0.1.tgz#7da8cf2e26628ed732803581fd21f67cacd2eeec"
@@ -1074,8 +1220,8 @@ arrify@^1.0.0, arrify@^1.0.1:
   resolved "https://registry.yarnpkg.com/arrify/-/arrify-1.0.1.tgz#898508da2226f380df904728456849c1501a4b0d"
 
 asn1.js@^4.0.0:
-  version "4.9.2"
-  resolved "https://registry.yarnpkg.com/asn1.js/-/asn1.js-4.9.2.tgz#8117ef4f7ed87cd8f89044b5bff97ac243a16c9a"
+  version "4.10.1"
+  resolved "https://registry.yarnpkg.com/asn1.js/-/asn1.js-4.10.1.tgz#b9c2bf5805f1e64aadeed6df3a2bfafb5a73f5a0"
   dependencies:
     bn.js "^4.0.0"
     inherits "^2.0.1"
@@ -1111,6 +1257,10 @@ ast-types@0.9.6:
   version "0.9.6"
   resolved "https://registry.yarnpkg.com/ast-types/-/ast-types-0.9.6.tgz#102c9e9e9005d3e7e3829bf0c4fa24ee862ee9b9"
 
+astral-regex@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-1.0.0.tgz#6c8c3fb827dd43ee3918f27b82782ab7658a6fd9"
+
 astw@^2.0.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/astw/-/astw-2.2.0.tgz#7bd41784d32493987aeb239b6b4e1c57a873b917"
@@ -1121,11 +1271,15 @@ async-each@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/async-each/-/async-each-1.0.1.tgz#19d386a1d9edc6e7c1c85d388aedbcc56d33602d"
 
+async-limiter@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.0.tgz#78faed8c3d074ab81f22b4e985d79e8738f720f8"
+
 async@^1.4.0, async@^1.5.0:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
 
-async@^2.1.2:
+async@^2.1.2, async@^2.1.4:
   version "2.6.0"
   resolved "https://registry.yarnpkg.com/async/-/async-2.6.0.tgz#61a29abb6fcc026fea77e56d1c6ec53a795951f4"
   dependencies:
@@ -1143,7 +1297,11 @@ aws-sign2@~0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/aws-sign2/-/aws-sign2-0.6.0.tgz#14342dd38dbcc94d0e5b87d763cd63612c0e794f"
 
-aws4@^1.2.1:
+aws-sign2@~0.7.0:
+  version "0.7.0"
+  resolved "https://registry.yarnpkg.com/aws-sign2/-/aws-sign2-0.7.0.tgz#b46e890934a9591f2d2f6f86d7e6a9f1b3fe76a8"
+
+aws4@^1.2.1, aws4@^1.6.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.6.0.tgz#83ef5ca860b2b32e4a0deedee8c771b9db57471e"
 
@@ -1155,20 +1313,48 @@ babel-code-frame@^6.22.0, babel-code-frame@^6.26.0:
     esutils "^2.0.2"
     js-tokens "^3.0.2"
 
+babel-core@^6.0.0, babel-core@^6.26.0:
+  version "6.26.0"
+  resolved "https://registry.yarnpkg.com/babel-core/-/babel-core-6.26.0.tgz#af32f78b31a6fcef119c87b0fd8d9753f03a0bb8"
+  dependencies:
+    babel-code-frame "^6.26.0"
+    babel-generator "^6.26.0"
+    babel-helpers "^6.24.1"
+    babel-messages "^6.23.0"
+    babel-register "^6.26.0"
+    babel-runtime "^6.26.0"
+    babel-template "^6.26.0"
+    babel-traverse "^6.26.0"
+    babel-types "^6.26.0"
+    babylon "^6.18.0"
+    convert-source-map "^1.5.0"
+    debug "^2.6.8"
+    json5 "^0.5.1"
+    lodash "^4.17.4"
+    minimatch "^3.0.4"
+    path-is-absolute "^1.0.1"
+    private "^0.1.7"
+    slash "^1.0.0"
+    source-map "^0.5.6"
+
+babel-core@^7.0.0-0:
+  version "7.0.0-bridge.0"
+  resolved "https://registry.yarnpkg.com/babel-core/-/babel-core-7.0.0-bridge.0.tgz#95a492ddd90f9b4e9a4a1da14eb335b87b634ece"
+
 babel-eslint@^8.0.1:
-  version "8.2.1"
-  resolved "https://registry.yarnpkg.com/babel-eslint/-/babel-eslint-8.2.1.tgz#136888f3c109edc65376c23ebf494f36a3e03951"
+  version "8.2.2"
+  resolved "https://registry.yarnpkg.com/babel-eslint/-/babel-eslint-8.2.2.tgz#1102273354c6f0b29b4ea28a65f97d122296b68b"
   dependencies:
-    "@babel/code-frame" "7.0.0-beta.36"
-    "@babel/traverse" "7.0.0-beta.36"
-    "@babel/types" "7.0.0-beta.36"
-    babylon "7.0.0-beta.36"
+    "@babel/code-frame" "^7.0.0-beta.40"
+    "@babel/traverse" "^7.0.0-beta.40"
+    "@babel/types" "^7.0.0-beta.40"
+    babylon "^7.0.0-beta.40"
     eslint-scope "~3.7.1"
     eslint-visitor-keys "^1.0.0"
 
-babel-generator@^6.18.0:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-generator/-/babel-generator-6.26.0.tgz#ac1ae20070b79f6e3ca1d3269613053774f20dc5"
+babel-generator@^6.18.0, babel-generator@^6.26.0:
+  version "6.26.1"
+  resolved "https://registry.yarnpkg.com/babel-generator/-/babel-generator-6.26.1.tgz#1844408d3b8f0d35a404ea7ac180f087a601bd90"
   dependencies:
     babel-messages "^6.23.0"
     babel-runtime "^6.26.0"
@@ -1176,9 +1362,23 @@ babel-generator@^6.18.0:
     detect-indent "^4.0.0"
     jsesc "^1.3.0"
     lodash "^4.17.4"
-    source-map "^0.5.6"
+    source-map "^0.5.7"
     trim-right "^1.0.1"
 
+babel-helpers@^6.24.1:
+  version "6.24.1"
+  resolved "https://registry.yarnpkg.com/babel-helpers/-/babel-helpers-6.24.1.tgz#3471de9caec388e5c850e597e58a26ddf37602b2"
+  dependencies:
+    babel-runtime "^6.22.0"
+    babel-template "^6.24.1"
+
+babel-jest@^22.4.1:
+  version "22.4.1"
+  resolved "https://registry.yarnpkg.com/babel-jest/-/babel-jest-22.4.1.tgz#ff53ebca45957347f27ff4666a31499fbb4c4ddd"
+  dependencies:
+    babel-plugin-istanbul "^4.1.5"
+    babel-preset-jest "^22.4.1"
+
 babel-loader@8.0.0-beta.0:
   version "8.0.0-beta.0"
   resolved "https://registry.yarnpkg.com/babel-loader/-/babel-loader-8.0.0-beta.0.tgz#b85c3b52d1095949125c72c7ec1fa0fbb47a11ff"
@@ -1193,7 +1393,7 @@ babel-messages@^6.23.0:
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-istanbul@^4.1.4:
+babel-plugin-istanbul@^4.1.5:
   version "4.1.5"
   resolved "https://registry.yarnpkg.com/babel-plugin-istanbul/-/babel-plugin-istanbul-4.1.5.tgz#6760cdd977f411d3e175bb064f2bc327d99b2b6e"
   dependencies:
@@ -1201,13 +1401,40 @@ babel-plugin-istanbul@^4.1.4:
     istanbul-lib-instrument "^1.7.5"
     test-exclude "^4.1.1"
 
-babel-plugin-transform-charcodes@0.0.10:
-  version "0.0.10"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-charcodes/-/babel-plugin-transform-charcodes-0.0.10.tgz#cdb76363e1e91ac105f3f94b168f41cf27983e80"
+babel-plugin-jest-hoist@^22.4.1:
+  version "22.4.1"
+  resolved "https://registry.yarnpkg.com/babel-plugin-jest-hoist/-/babel-plugin-jest-hoist-22.4.1.tgz#d712fe5da8b6965f3191dacddbefdbdf4fb66d63"
+
+babel-plugin-syntax-object-rest-spread@^6.13.0:
+  version "6.13.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz#fd6536f2bce13836ffa3a5458c4903a597bb3bf5"
+
+babel-plugin-transform-charcodes@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-charcodes/-/babel-plugin-transform-charcodes-0.1.0.tgz#c71b301019c90615b940faf0f15f275ec5c81a3d"
   dependencies:
     "@babel/traverse" "^7.0.0-beta.31"
     babylon "^7.0.0-beta.31"
 
+babel-preset-jest@^22.4.1:
+  version "22.4.1"
+  resolved "https://registry.yarnpkg.com/babel-preset-jest/-/babel-preset-jest-22.4.1.tgz#efa2e5f5334242a9457a068452d7d09735db172a"
+  dependencies:
+    babel-plugin-jest-hoist "^22.4.1"
+    babel-plugin-syntax-object-rest-spread "^6.13.0"
+
+babel-register@^6.26.0:
+  version "6.26.0"
+  resolved "https://registry.yarnpkg.com/babel-register/-/babel-register-6.26.0.tgz#6ed021173e2fcb486d7acb45c6009a856f647071"
+  dependencies:
+    babel-core "^6.26.0"
+    babel-runtime "^6.26.0"
+    core-js "^2.5.0"
+    home-or-tmp "^2.0.0"
+    lodash "^4.17.4"
+    mkdirp "^0.5.1"
+    source-map-support "^0.4.15"
+
 babel-runtime@^6.22.0, babel-runtime@^6.26.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-runtime/-/babel-runtime-6.26.0.tgz#965c7058668e82b55d7bfe04ff2337bc8b5647fe"
@@ -1215,7 +1442,7 @@ babel-runtime@^6.22.0, babel-runtime@^6.26.0:
     core-js "^2.4.0"
     regenerator-runtime "^0.11.0"
 
-babel-template@^6.16.0:
+babel-template@^6.16.0, babel-template@^6.24.1, babel-template@^6.26.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-template/-/babel-template-6.26.0.tgz#de03e2d16396b069f46dd9fff8521fb1a0e35e02"
   dependencies:
@@ -1248,17 +1475,13 @@ babel-types@^6.18.0, babel-types@^6.26.0:
     lodash "^4.17.4"
     to-fast-properties "^1.0.3"
 
-babylon@7.0.0-beta.36:
-  version "7.0.0-beta.36"
-  resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.36.tgz#3a3683ba6a9a1e02b0aa507c8e63435e39305b9e"
-
-babylon@7.0.0-beta.38, babylon@^7.0.0-beta.31:
-  version "7.0.0-beta.38"
-  resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.38.tgz#9b3a33e571a47464a2d20cb9dd5a570f00e3f996"
+babylon@7.0.0-beta.40, babylon@^7.0.0-beta.31, babylon@^7.0.0-beta.40:
+  version "7.0.0-beta.40"
+  resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.40.tgz#91fc8cd56d5eb98b28e6fde41045f2957779940a"
 
-babylon@7.0.0-beta.39:
-  version "7.0.0-beta.39"
-  resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.39.tgz#512833ea788f6570c6db026d743a7565e58d3aeb"
+babylon@7.0.0-beta.41:
+  version "7.0.0-beta.41"
+  resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.41.tgz#e1b208d53a7a05ede2cf96cbecd86f5ed47f584f"
 
 babylon@^6.18.0:
   version "6.18.0"
@@ -1269,8 +1492,8 @@ balanced-match@^1.0.0:
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
 
 base64-js@^1.0.2:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.2.1.tgz#a91947da1f4a516ea38e5b4ec0ec3773675e0886"
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.2.3.tgz#fb13668233d9614cf5fb4bce95a9ba4096cdf801"
 
 base@^0.11.1:
   version "0.11.2"
@@ -1328,9 +1551,21 @@ boom@2.x.x:
   dependencies:
     hoek "2.x.x"
 
+boom@4.x.x:
+  version "4.3.1"
+  resolved "https://registry.yarnpkg.com/boom/-/boom-4.3.1.tgz#4f8a3005cb4a7e3889f749030fd25b96e01d2e31"
+  dependencies:
+    hoek "4.x.x"
+
+boom@5.x.x:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/boom/-/boom-5.2.0.tgz#5dd9da6ee3a5f302077436290cb717d3f4a54e02"
+  dependencies:
+    hoek "4.x.x"
+
 brace-expansion@^1.0.0, brace-expansion@^1.1.7:
-  version "1.1.8"
-  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.8.tgz#c07b211c7c952ec1f8efd51a77ef0d1d3990a292"
+  version "1.1.11"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
   dependencies:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
@@ -1343,9 +1578,9 @@ braces@^1.8.2:
     preserve "^0.2.0"
     repeat-element "^1.1.2"
 
-braces@^2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/braces/-/braces-2.3.0.tgz#a46941cb5fb492156b3d6a656e06c35364e3e66e"
+braces@^2.3.0, braces@^2.3.1:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/braces/-/braces-2.3.1.tgz#7086c913b4e5a08dbe37ac0ee6a2500c4ba691bb"
   dependencies:
     arr-flatten "^1.1.0"
     array-unique "^0.3.2"
@@ -1353,6 +1588,7 @@ braces@^2.3.0:
     extend-shallow "^2.0.1"
     fill-range "^4.0.0"
     isobject "^3.0.1"
+    kind-of "^6.0.2"
     repeat-element "^1.1.2"
     snapdragon "^0.8.1"
     snapdragon-node "^2.0.1"
@@ -1374,8 +1610,8 @@ browser-pack@^5.0.1:
     umd "^3.0.0"
 
 browser-pack@^6.0.1:
-  version "6.0.3"
-  resolved "https://registry.yarnpkg.com/browser-pack/-/browser-pack-6.0.3.tgz#91ca96518583ef580ab063a309de62e407767a39"
+  version "6.0.4"
+  resolved "https://registry.yarnpkg.com/browser-pack/-/browser-pack-6.0.4.tgz#9a73beb3b48f9e36868be007b64400102c04a99f"
   dependencies:
     JSONStream "^1.0.3"
     combine-source-map "~0.8.0"
@@ -1384,16 +1620,16 @@ browser-pack@^6.0.1:
     through2 "^2.0.0"
     umd "^3.0.0"
 
-browser-resolve@^1.11.0, browser-resolve@^1.7.0:
+browser-process-hrtime@^0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/browser-process-hrtime/-/browser-process-hrtime-0.1.2.tgz#425d68a58d3447f02a04aa894187fce8af8b7b8e"
+
+browser-resolve@^1.11.0, browser-resolve@^1.11.2, browser-resolve@^1.7.0:
   version "1.11.2"
   resolved "https://registry.yarnpkg.com/browser-resolve/-/browser-resolve-1.11.2.tgz#8ff09b0a2c421718a1051c260b32e48f442938ce"
   dependencies:
     resolve "1.1.7"
 
-browser-stdout@1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/browser-stdout/-/browser-stdout-1.3.0.tgz#f351d32969d32fa5d7a5567154263d928ae3bd1f"
-
 browser-unpack@^1.1.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/browser-unpack/-/browser-unpack-1.2.0.tgz#357aee31fc467831684d063e4355e070a782970d"
@@ -1513,12 +1749,18 @@ browserify@^13.1.1:
     vm-browserify "~0.0.1"
     xtend "^4.0.0"
 
-browserslist@^2.4.0:
-  version "2.11.3"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-2.11.3.tgz#fe36167aed1bbcde4827ebfe71347a2cc70b99b2"
+browserslist@^3.0.0:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-3.1.1.tgz#d380fc048bc3a33e60fb87dc135110ebaaa6320a"
+  dependencies:
+    caniuse-lite "^1.0.30000809"
+    electron-to-chromium "^1.3.33"
+
+bser@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/bser/-/bser-2.0.0.tgz#9ac78d3ed5d915804fd87acb158bc797147a1719"
   dependencies:
-    caniuse-lite "^1.0.30000792"
-    electron-to-chromium "^1.3.30"
+    node-int64 "^0.4.0"
 
 buffer-xor@^1.0.3:
   version "1.0.3"
@@ -1573,14 +1815,6 @@ cached-path-relative@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/cached-path-relative/-/cached-path-relative-1.0.1.tgz#d09c4b52800aa4c078e2dd81a869aac90d2e54e7"
 
-caching-transform@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/caching-transform/-/caching-transform-1.0.1.tgz#6dbdb2f20f8d8fbce79f3e94e9d1742dcdf5c0a1"
-  dependencies:
-    md5-hex "^1.2.0"
-    mkdirp "^0.5.1"
-    write-file-atomic "^1.1.4"
-
 caller-path@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/caller-path/-/caller-path-0.1.0.tgz#94085ef63581ecd3daa92444a8fe94e82577751f"
@@ -1591,6 +1825,10 @@ callsites@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/callsites/-/callsites-0.2.0.tgz#afab96262910a7f33c19a5775825c69f34e350ca"
 
+callsites@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/callsites/-/callsites-2.0.0.tgz#06eb84f00eea413da86affefacbffb36093b3c50"
+
 camel-case@3.0.x:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/camel-case/-/camel-case-3.0.0.tgz#ca3c3688a4e9cf3a4cda777dc4dcbc713249cf73"
@@ -1605,6 +1843,14 @@ camelcase-keys@^2.0.0:
     camelcase "^2.0.0"
     map-obj "^1.0.0"
 
+camelcase-keys@^4.0.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/camelcase-keys/-/camelcase-keys-4.2.0.tgz#a2aa5fb1af688758259c32c141426d78923b9b77"
+  dependencies:
+    camelcase "^4.1.0"
+    map-obj "^2.0.0"
+    quick-lru "^1.0.0"
+
 camelcase@^1.0.2:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-1.2.1.tgz#9bb5304d2e0b56698b2c758b08a3eaa9daa58a39"
@@ -1621,9 +1867,9 @@ camelcase@^4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-4.1.0.tgz#d545635be1e33c542649c69173e5de6acfae34dd"
 
-caniuse-lite@^1.0.30000792:
-  version "1.0.30000792"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000792.tgz#d0cea981f8118f3961471afbb43c9a1e5bbf0332"
+caniuse-lite@^1.0.30000809:
+  version "1.0.30000812"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000812.tgz#d173b686b49bc941fa18ff2e7e533048e20ed92c"
 
 caseless@~0.12.0:
   version "0.12.0"
@@ -1657,17 +1903,17 @@ chalk@^1.0.0, chalk@^1.1.1, chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
-chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.3.0.tgz#b5ea48efc9c1793dccc9b4767c93914d3f2d52ba"
+chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.2:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.3.2.tgz#250dc96b07491bfd601e648d66ddf5f60c7a5c65"
   dependencies:
-    ansi-styles "^3.1.0"
+    ansi-styles "^3.2.1"
     escape-string-regexp "^1.0.5"
-    supports-color "^4.0.0"
+    supports-color "^5.3.0"
 
-charcodes@0.0.10:
-  version "0.0.10"
-  resolved "https://registry.yarnpkg.com/charcodes/-/charcodes-0.0.10.tgz#98d67a7a1e17ce154d1faafd01e72e9a6cff54f5"
+charcodes@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/charcodes/-/charcodes-0.1.0.tgz#61f8c244fc7f94f186fe74f31078901a3ed7928e"
 
 chardet@^0.4.0:
   version "0.4.2"
@@ -1688,7 +1934,7 @@ cheerio@^1.0.0-rc.1:
     lodash "^4.15.0"
     parse5 "^3.0.1"
 
-chokidar@^1.6.1, chokidar@^1.7.0:
+chokidar@^1.6.1:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-1.7.0.tgz#798e689778151c8076b4b360e5edd28cda2bb468"
   dependencies:
@@ -1703,6 +1949,24 @@ chokidar@^1.6.1, chokidar@^1.7.0:
   optionalDependencies:
     fsevents "^1.0.0"
 
+chokidar@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-2.0.2.tgz#4dc65139eeb2714977735b6a35d06e97b494dfd7"
+  dependencies:
+    anymatch "^2.0.0"
+    async-each "^1.0.0"
+    braces "^2.3.0"
+    glob-parent "^3.1.0"
+    inherits "^2.0.1"
+    is-binary-path "^1.0.0"
+    is-glob "^4.0.0"
+    normalize-path "^2.1.1"
+    path-is-absolute "^1.0.0"
+    readdirp "^2.0.0"
+    upath "^1.0.0"
+  optionalDependencies:
+    fsevents "^1.0.0"
+
 ci-info@^1.0.0:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-1.1.2.tgz#03561259db48d0474c8bdc90f5b47b068b6bbfb4"
@@ -1886,9 +2150,9 @@ combine-source-map@~0.8.0:
     lodash.memoize "~3.0.3"
     source-map "~0.5.3"
 
-combined-stream@^1.0.5, combined-stream@~1.0.5:
-  version "1.0.5"
-  resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.5.tgz#938370a57b4a51dea2c77c15d5c5fdf895164009"
+combined-stream@1.0.6, combined-stream@^1.0.5, combined-stream@~1.0.5:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.6.tgz#723e7df6e801ac5613113a7e445a9b69cb632818"
   dependencies:
     delayed-stream "~1.0.0"
 
@@ -1896,19 +2160,9 @@ command-join@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/command-join/-/command-join-2.0.0.tgz#52e8b984f4872d952ff1bdc8b98397d27c7144cf"
 
-commander@2.12.x:
-  version "2.12.2"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.12.2.tgz#0f5946c427ed9ec0d91a46bb9def53e54650e555"
-
-commander@2.9.0:
-  version "2.9.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.9.0.tgz#9c99094176e12240cb22d6c5146098400fe0f7d4"
-  dependencies:
-    graceful-readlink ">= 1.0.0"
-
-commander@^2.11.0, commander@^2.8.1, commander@^2.9.0, commander@~2.13.0:
-  version "2.13.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.13.0.tgz#6964bca67685df7c1f1430c584f07d7597885b9c"
+commander@2.14.x, commander@^2.11.0, commander@^2.8.1, commander@^2.9.0, commander@~2.14.1:
+  version "2.14.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.14.1.tgz#2235123e37af8ca3c65df45b026dbd357b01b9aa"
 
 commondir@^1.0.1:
   version "1.0.1"
@@ -1930,8 +2184,8 @@ concat-map@0.0.1:
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
 
 concat-stream@^1.4.10, concat-stream@^1.4.6, concat-stream@^1.5.0, concat-stream@^1.6.0:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.0.tgz#0aac662fd52be78964d5532f694784e70110acf7"
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.1.tgz#261b8f518301f1d834e36342b9fea095d2620a26"
   dependencies:
     inherits "^2.0.3"
     readable-stream "^2.2.2"
@@ -1959,70 +2213,74 @@ constants-browserify@^1.0.0, constants-browserify@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/constants-browserify/-/constants-browserify-1.0.0.tgz#c20b96d8c617748aaf1c16021760cd27fcb8cb75"
 
-conventional-changelog-angular@^1.5.2:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/conventional-changelog-angular/-/conventional-changelog-angular-1.6.0.tgz#0a26a071f2c9fcfcf2b86ba0cfbf6e6301b75bfa"
+content-type-parser@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/content-type-parser/-/content-type-parser-1.0.2.tgz#caabe80623e63638b2502fd4c7f12ff4ce2352e7"
+
+conventional-changelog-angular@^1.6.6:
+  version "1.6.6"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-angular/-/conventional-changelog-angular-1.6.6.tgz#b27f2b315c16d0a1f23eb181309d0e6a4698ea0f"
   dependencies:
     compare-func "^1.3.1"
-    q "^1.4.1"
+    q "^1.5.1"
 
-conventional-changelog-atom@^0.1.2:
-  version "0.1.2"
-  resolved "https://registry.yarnpkg.com/conventional-changelog-atom/-/conventional-changelog-atom-0.1.2.tgz#12595ad5267a6937c34cf900281b1c65198a4c63"
+conventional-changelog-atom@^0.2.4:
+  version "0.2.4"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-atom/-/conventional-changelog-atom-0.2.4.tgz#4917759947f4db86073f9d3838a2d54302d5843d"
   dependencies:
-    q "^1.4.1"
+    q "^1.5.1"
 
 conventional-changelog-cli@^1.3.1:
-  version "1.3.5"
-  resolved "https://registry.yarnpkg.com/conventional-changelog-cli/-/conventional-changelog-cli-1.3.5.tgz#46c51496216b7406588883defa6fac589e9bb31e"
+  version "1.3.16"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-cli/-/conventional-changelog-cli-1.3.16.tgz#69acdcc4b68b4d123c5945868dffe394960cea9d"
   dependencies:
     add-stream "^1.0.0"
-    conventional-changelog "^1.1.7"
-    lodash "^4.1.0"
-    meow "^3.7.0"
+    conventional-changelog "^1.1.18"
+    lodash "^4.2.1"
+    meow "^4.0.0"
     tempfile "^1.1.1"
 
-conventional-changelog-codemirror@^0.2.1:
-  version "0.2.1"
-  resolved "https://registry.yarnpkg.com/conventional-changelog-codemirror/-/conventional-changelog-codemirror-0.2.1.tgz#299a4f7147baf350e6c8158fc54954a291c5cc09"
+conventional-changelog-codemirror@^0.3.4:
+  version "0.3.4"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-codemirror/-/conventional-changelog-codemirror-0.3.4.tgz#debc43991d487d7964e65087fbbe034044bd51fb"
   dependencies:
-    q "^1.4.1"
+    q "^1.5.1"
 
-conventional-changelog-core@^1.9.3:
-  version "1.9.5"
-  resolved "https://registry.yarnpkg.com/conventional-changelog-core/-/conventional-changelog-core-1.9.5.tgz#5db7566dad7c0cb75daf47fbb2976f7bf9928c1d"
+conventional-changelog-core@^2.0.5:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-core/-/conventional-changelog-core-2.0.5.tgz#45b6347c4c6512e1f163f7ff55c9f5bcb88fd990"
   dependencies:
-    conventional-changelog-writer "^2.0.3"
-    conventional-commits-parser "^2.1.0"
-    dateformat "^1.0.12"
+    conventional-changelog-writer "^3.0.4"
+    conventional-commits-parser "^2.1.5"
+    dateformat "^3.0.0"
     get-pkg-repo "^1.0.0"
-    git-raw-commits "^1.3.0"
+    git-raw-commits "^1.3.4"
     git-remote-origin-url "^2.0.0"
-    git-semver-tags "^1.2.3"
-    lodash "^4.0.0"
+    git-semver-tags "^1.3.4"
+    lodash "^4.2.1"
     normalize-package-data "^2.3.5"
-    q "^1.4.1"
+    q "^1.5.1"
     read-pkg "^1.1.0"
     read-pkg-up "^1.0.1"
     through2 "^2.0.0"
 
-conventional-changelog-ember@^0.2.9:
-  version "0.2.10"
-  resolved "https://registry.yarnpkg.com/conventional-changelog-ember/-/conventional-changelog-ember-0.2.10.tgz#dcd6e4cdc2e6c2b58653cf4d2cb1656a60421929"
+conventional-changelog-ember@^0.3.6:
+  version "0.3.6"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-ember/-/conventional-changelog-ember-0.3.6.tgz#f3825d7434168f3d9211b5532dc1d5769532b668"
   dependencies:
-    q "^1.4.1"
+    q "^1.5.1"
 
-conventional-changelog-eslint@^0.2.1:
-  version "0.2.1"
-  resolved "https://registry.yarnpkg.com/conventional-changelog-eslint/-/conventional-changelog-eslint-0.2.1.tgz#2c2a11beb216f80649ba72834180293b687c0662"
+conventional-changelog-eslint@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-eslint/-/conventional-changelog-eslint-1.0.5.tgz#8bae05ebbf574e6506caf7b37dc51ca21b74d220"
   dependencies:
-    q "^1.4.1"
+    q "^1.5.1"
 
-conventional-changelog-express@^0.2.1:
-  version "0.2.1"
-  resolved "https://registry.yarnpkg.com/conventional-changelog-express/-/conventional-changelog-express-0.2.1.tgz#838d9e1e6c9099703b150b9c19aa2d781742bd6c"
+conventional-changelog-express@^0.3.4:
+  version "0.3.4"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-express/-/conventional-changelog-express-0.3.4.tgz#812a9cf778677e12f978ac9c40d85297c0bfcca9"
   dependencies:
-    q "^1.4.1"
+    q "^1.5.1"
 
 conventional-changelog-jquery@^0.1.0:
   version "0.1.0"
@@ -2036,75 +2294,80 @@ conventional-changelog-jscs@^0.1.0:
   dependencies:
     q "^1.4.1"
 
-conventional-changelog-jshint@^0.2.1:
-  version "0.2.1"
-  resolved "https://registry.yarnpkg.com/conventional-changelog-jshint/-/conventional-changelog-jshint-0.2.1.tgz#86139bb3ac99899f2b177e9617e09b37d99bcf3a"
+conventional-changelog-jshint@^0.3.4:
+  version "0.3.4"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-jshint/-/conventional-changelog-jshint-0.3.4.tgz#b2de33cd0870d9af804ac6a4fded0ee25b69c9bb"
   dependencies:
     compare-func "^1.3.1"
-    q "^1.4.1"
+    q "^1.5.1"
 
-conventional-changelog-writer@^2.0.3:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/conventional-changelog-writer/-/conventional-changelog-writer-2.0.3.tgz#073b0c39f1cc8fc0fd9b1566e93833f51489c81c"
+conventional-changelog-preset-loader@^1.1.6:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-preset-loader/-/conventional-changelog-preset-loader-1.1.6.tgz#b29af6332f9313857be36427623c9016bfeeaf33"
+
+conventional-changelog-writer@^3.0.4:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-writer/-/conventional-changelog-writer-3.0.4.tgz#705b46a8b8277bd7fd79cad8032095b5d803864c"
   dependencies:
     compare-func "^1.3.1"
-    conventional-commits-filter "^1.1.1"
-    dateformat "^1.0.11"
+    conventional-commits-filter "^1.1.5"
+    dateformat "^3.0.0"
     handlebars "^4.0.2"
     json-stringify-safe "^5.0.1"
-    lodash "^4.0.0"
-    meow "^3.3.0"
-    semver "^5.0.1"
+    lodash "^4.2.1"
+    meow "^4.0.0"
+    semver "^5.5.0"
     split "^1.0.0"
     through2 "^2.0.0"
 
-conventional-changelog@^1.1.7:
-  version "1.1.7"
-  resolved "https://registry.yarnpkg.com/conventional-changelog/-/conventional-changelog-1.1.7.tgz#9151a62b1d8edb2d82711dabf5b7cf71041f82b1"
-  dependencies:
-    conventional-changelog-angular "^1.5.2"
-    conventional-changelog-atom "^0.1.2"
-    conventional-changelog-codemirror "^0.2.1"
-    conventional-changelog-core "^1.9.3"
-    conventional-changelog-ember "^0.2.9"
-    conventional-changelog-eslint "^0.2.1"
-    conventional-changelog-express "^0.2.1"
+conventional-changelog@^1.1.18:
+  version "1.1.18"
+  resolved "https://registry.yarnpkg.com/conventional-changelog/-/conventional-changelog-1.1.18.tgz#ffe28798e4ddef5f6e2f74398e8248bcb233360b"
+  dependencies:
+    conventional-changelog-angular "^1.6.6"
+    conventional-changelog-atom "^0.2.4"
+    conventional-changelog-codemirror "^0.3.4"
+    conventional-changelog-core "^2.0.5"
+    conventional-changelog-ember "^0.3.6"
+    conventional-changelog-eslint "^1.0.5"
+    conventional-changelog-express "^0.3.4"
     conventional-changelog-jquery "^0.1.0"
     conventional-changelog-jscs "^0.1.0"
-    conventional-changelog-jshint "^0.2.1"
+    conventional-changelog-jshint "^0.3.4"
+    conventional-changelog-preset-loader "^1.1.6"
 
-conventional-commits-filter@^1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/conventional-commits-filter/-/conventional-commits-filter-1.1.1.tgz#72172319c0c88328a015b30686b55527b3a5e54a"
+conventional-commits-filter@^1.1.1, conventional-commits-filter@^1.1.5:
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/conventional-commits-filter/-/conventional-commits-filter-1.1.5.tgz#77aac065e3de9c1a74b801e8e25c9affb3184f65"
   dependencies:
     is-subset "^0.1.1"
     modify-values "^1.0.0"
 
-conventional-commits-parser@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/conventional-commits-parser/-/conventional-commits-parser-2.1.0.tgz#9b4b7c91124bf2a1a9a2cc1c72760d382cbbb229"
+conventional-commits-parser@^2.1.1, conventional-commits-parser@^2.1.5:
+  version "2.1.5"
+  resolved "https://registry.yarnpkg.com/conventional-commits-parser/-/conventional-commits-parser-2.1.5.tgz#9ac3a4ab221c0c3c9e9dd2c09ae01e6d1e1dabe0"
   dependencies:
     JSONStream "^1.0.4"
     is-text-path "^1.0.0"
     lodash "^4.2.1"
-    meow "^3.3.0"
+    meow "^4.0.0"
     split2 "^2.0.0"
     through2 "^2.0.0"
     trim-off-newlines "^1.0.0"
 
 conventional-recommended-bump@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/conventional-recommended-bump/-/conventional-recommended-bump-1.1.0.tgz#964d4fcc70fb5259d41fa9b39d3df6afdb87d253"
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/conventional-recommended-bump/-/conventional-recommended-bump-1.2.1.tgz#1b7137efb5091f99fe009e2fe9ddb7cc490e9375"
   dependencies:
     concat-stream "^1.4.10"
     conventional-commits-filter "^1.1.1"
-    conventional-commits-parser "^2.1.0"
+    conventional-commits-parser "^2.1.1"
     git-raw-commits "^1.3.0"
-    git-semver-tags "^1.2.3"
+    git-semver-tags "^1.3.0"
     meow "^3.3.0"
     object-assign "^4.0.1"
 
-convert-source-map@^1.1.0, convert-source-map@^1.3.0:
+convert-source-map@^1.1.0, convert-source-map@^1.4.0, convert-source-map@^1.5.0:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/convert-source-map/-/convert-source-map-1.5.1.tgz#b8278097b9bc229365de5c62cf5fcaed8b5599e5"
 
@@ -2116,7 +2379,7 @@ copy-descriptor@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/copy-descriptor/-/copy-descriptor-0.1.1.tgz#676f6eb3c39997c2ee1ac3a924fd6124748f578d"
 
-core-js@^2.4.0, core-js@^2.5.3:
+core-js@^2.4.0, core-js@^2.5.0, core-js@^2.5.3:
   version "2.5.3"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.5.3.tgz#8acc38345824f16d8365b7c9b4259168e8ed603e"
 
@@ -2160,13 +2423,6 @@ create-hmac@^1.1.0, create-hmac@^1.1.2, create-hmac@^1.1.4:
     safe-buffer "^5.0.1"
     sha.js "^2.4.8"
 
-cross-spawn@^4:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-4.0.2.tgz#7b9247621c23adfdd3856004a823cbe397424d41"
-  dependencies:
-    lru-cache "^4.0.1"
-    which "^1.2.9"
-
 cross-spawn@^5.0.1, cross-spawn@^5.1.0:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
@@ -2181,6 +2437,12 @@ cryptiles@2.x.x:
   dependencies:
     boom "2.x.x"
 
+cryptiles@3.x.x:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/cryptiles/-/cryptiles-3.1.2.tgz#a89fbb220f5ce25ec56e8c4aa8a4fd7b5b0d29fe"
+  dependencies:
+    boom "5.x.x"
+
 crypto-browserify@^3.0.0, crypto-browserify@^3.11.0:
   version "3.12.0"
   resolved "https://registry.yarnpkg.com/crypto-browserify/-/crypto-browserify-3.12.0.tgz#396cf9f3137f03e4b8e532c58f698254e00f80ec"
@@ -2210,6 +2472,16 @@ css-what@2.1:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.0.tgz#9467d032c38cfaefb9f2d79501253062f87fa1bd"
 
+cssom@0.3.x, "cssom@>= 0.3.2 < 0.4.0":
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/cssom/-/cssom-0.3.2.tgz#b8036170c79f07a90ff2f16e22284027a243848b"
+
+"cssstyle@>= 0.2.37 < 0.3.0":
+  version "0.2.37"
+  resolved "https://registry.yarnpkg.com/cssstyle/-/cssstyle-0.2.37.tgz#541097234cb2513c83ceed3acddc27ff27987d54"
+  dependencies:
+    cssom "0.3.x"
+
 currently-unhandled@^0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/currently-unhandled/-/currently-unhandled-0.4.1.tgz#988df33feab191ef799a61369dd76c17adf957ea"
@@ -2242,26 +2514,13 @@ date-now@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"
 
-dateformat@^1.0.11, dateformat@^1.0.12:
-  version "1.0.12"
-  resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-1.0.12.tgz#9f124b67594c937ff706932e4a642cca8dbbfee9"
-  dependencies:
-    get-stdin "^4.0.1"
-    meow "^3.3.0"
-
 dateformat@^2.0.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-2.2.0.tgz#4065e2013cf9fb916ddfd82efb506ad4c6769062"
 
-debug-log@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/debug-log/-/debug-log-1.0.1.tgz#2307632d4c04382b8df8a32f70b895046d52745f"
-
-debug@2.6.8:
-  version "2.6.8"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.8.tgz#e731531ca2ede27d188222427da17821d68ff4fc"
-  dependencies:
-    ms "2.0.0"
+dateformat@^3.0.0:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-3.0.3.tgz#a6e37499a4d9a9cf85ef5872044d62901c9889ae"
 
 debug@^2.2.0, debug@^2.3.3, debug@^2.6.8:
   version "2.6.9"
@@ -2275,7 +2534,14 @@ debug@^3.0.0, debug@^3.0.1, debug@^3.1.0:
   dependencies:
     ms "2.0.0"
 
-decamelize@^1.0.0, decamelize@^1.1.1, decamelize@^1.1.2:
+decamelize-keys@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/decamelize-keys/-/decamelize-keys-1.1.0.tgz#d171a87933252807eb3cb61dc1c1445d078df2d9"
+  dependencies:
+    decamelize "^1.1.0"
+    map-obj "^1.0.0"
+
+decamelize@^1.0.0, decamelize@^1.1.0, decamelize@^1.1.1, decamelize@^1.1.2:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
 
@@ -2332,6 +2598,13 @@ define-property@^1.0.0:
   dependencies:
     is-descriptor "^1.0.0"
 
+define-property@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/define-property/-/define-property-2.0.2.tgz#d459689e8d654ba77e02a817f8710d702cb16e9d"
+  dependencies:
+    is-descriptor "^1.0.2"
+    isobject "^3.0.1"
+
 defined@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/defined/-/defined-1.0.0.tgz#c98d9bcef75674188e110969151199e39b1fa693"
@@ -2404,6 +2677,10 @@ detect-libc@^1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
 
+detect-newline@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/detect-newline/-/detect-newline-2.1.0.tgz#f41f1c10be4b00e87b5f13da680759f2c5bfd3e2"
+
 detective@^4.0.0:
   version "4.7.1"
   resolved "https://registry.yarnpkg.com/detective/-/detective-4.7.1.tgz#0eca7314338442febb6d65da54c10bb1c82b246e"
@@ -2411,9 +2688,9 @@ detective@^4.0.0:
     acorn "^5.2.1"
     defined "^1.0.0"
 
-diff@3.2.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.2.0.tgz#c9ce393a4b7cbd0b058a725c93df299027868ff9"
+diff@^3.2.0:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
 
 diffie-hellman@^5.0.0:
   version "5.0.2"
@@ -2423,7 +2700,7 @@ diffie-hellman@^5.0.0:
     miller-rabin "^4.0.0"
     randombytes "^2.0.0"
 
-doctrine@^2.0.2:
+doctrine@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-2.1.0.tgz#5cd01fc101621b42c4cd7f5d1a66243716d3f39d"
   dependencies:
@@ -2436,7 +2713,11 @@ dom-serializer@0, dom-serializer@~0.1.0:
     domelementtype "~1.1.1"
     entities "~1.1.1"
 
-domain-browser@^1.1.1, domain-browser@~1.1.0:
+domain-browser@^1.1.1:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/domain-browser/-/domain-browser-1.2.0.tgz#3d31f50191a6749dd1375a7f522e823d42e54eda"
+
+domain-browser@~1.1.0:
   version "1.1.7"
   resolved "https://registry.yarnpkg.com/domain-browser/-/domain-browser-1.1.7.tgz#867aa4b093faa05f1de08c06f4d7b21fdf8698bc"
 
@@ -2448,6 +2729,12 @@ domelementtype@~1.1.1:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/domelementtype/-/domelementtype-1.1.3.tgz#bd28773e2642881aec51544924299c5cd822185b"
 
+domexception@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/domexception/-/domexception-1.0.1.tgz#937442644ca6a31261ef36e3ec677fe805582c90"
+  dependencies:
+    webidl-conversions "^4.0.2"
+
 domhandler@^2.3.0:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/domhandler/-/domhandler-2.4.1.tgz#892e47000a99be55bbf3774ffea0561d8879c259"
@@ -2462,8 +2749,8 @@ domutils@1.5.1:
     domelementtype "1"
 
 domutils@^1.5.1:
-  version "1.6.2"
-  resolved "https://registry.yarnpkg.com/domutils/-/domutils-1.6.2.tgz#1958cc0b4c9426e9ed367fb1c8e854891b0fa3ff"
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/domutils/-/domutils-1.7.0.tgz#56ea341e834e06e6748af7a1cb25da67ea9f8c2a"
   dependencies:
     dom-serializer "0"
     domelementtype "1"
@@ -2496,9 +2783,9 @@ ecc-jsbn@~0.1.1:
   dependencies:
     jsbn "~0.1.0"
 
-electron-to-chromium@^1.3.30:
-  version "1.3.31"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.31.tgz#00d832cba9fe2358652b0c48a8816c8e3a037e9f"
+electron-to-chromium@^1.3.33:
+  version "1.3.34"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.34.tgz#d93498f40391bb0c16a603d8241b9951404157ed"
 
 elegant-spinner@^1.0.1:
   version "1.0.1"
@@ -2538,7 +2825,7 @@ end-of-stream@~0.1.5:
   dependencies:
     once "~1.3.0"
 
-enhanced-resolve@^3.4.0:
+enhanced-resolve@^3.0.0, enhanced-resolve@^3.4.0:
   version "3.4.1"
   resolved "https://registry.yarnpkg.com/enhanced-resolve/-/enhanced-resolve-3.4.1.tgz#0421e339fd71419b3da13d129b3979040230476e"
   dependencies:
@@ -2552,8 +2839,8 @@ entities@^1.1.1, entities@~1.1.1:
   resolved "https://registry.yarnpkg.com/entities/-/entities-1.1.1.tgz#6e5c2d0a5621b5dadaecef80b90edfb5cd7772f0"
 
 errno@^0.1.3:
-  version "0.1.6"
-  resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.6.tgz#c386ce8a6283f14fc09563b71560908c9bf53026"
+  version "0.1.7"
+  resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.7.tgz#4684d71779ad39af177e3f007996f7c67c852618"
   dependencies:
     prr "~1.0.1"
 
@@ -2582,8 +2869,8 @@ es-to-primitive@^1.1.1:
     is-symbol "^1.0.1"
 
 es5-ext@^0.10.14, es5-ext@^0.10.35, es5-ext@^0.10.9, es5-ext@~0.10.14:
-  version "0.10.38"
-  resolved "https://registry.yarnpkg.com/es5-ext/-/es5-ext-0.10.38.tgz#fa7d40d65bbc9bb8a67e1d3f9cc656a00530eed3"
+  version "0.10.39"
+  resolved "https://registry.yarnpkg.com/es5-ext/-/es5-ext-0.10.39.tgz#fca21b67559277ca4ac1a1ed7048b107b6f76d87"
   dependencies:
     es6-iterator "~2.0.3"
     es6-symbol "~3.1.1"
@@ -2640,10 +2927,21 @@ es6-weak-map@^2.0.1:
     es6-iterator "^2.0.1"
     es6-symbol "^3.1.1"
 
-escape-string-regexp@1.0.5, escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
+escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
+escodegen@^1.9.0:
+  version "1.9.1"
+  resolved "https://registry.yarnpkg.com/escodegen/-/escodegen-1.9.1.tgz#dbae17ef96c8e4bedb1356f4504fa4cc2f7cb7e2"
+  dependencies:
+    esprima "^3.1.3"
+    estraverse "^4.2.0"
+    esutils "^2.0.2"
+    optionator "^0.8.1"
+  optionalDependencies:
+    source-map "~0.6.1"
+
 escope@^3.6.0:
   version "3.6.0"
   resolved "https://registry.yarnpkg.com/escope/-/escope-3.6.0.tgz#e01975e812781a163a6dadfdd80398dc64c889c3"
@@ -2658,14 +2956,14 @@ eslint-config-babel@^7.0.2:
   resolved "https://registry.yarnpkg.com/eslint-config-babel/-/eslint-config-babel-7.0.2.tgz#cbde74f61cee087d8cd6e607fcfa087869a02d99"
 
 eslint-plugin-flowtype@^2.20.0:
-  version "2.41.0"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-flowtype/-/eslint-plugin-flowtype-2.41.0.tgz#fd5221c60ba917c059d7ef69686a99cca09fd871"
+  version "2.46.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-flowtype/-/eslint-plugin-flowtype-2.46.1.tgz#c4f81d580cd89c82bc3a85a1ccf4ae3a915143a4"
   dependencies:
     lodash "^4.15.0"
 
 eslint-plugin-prettier@^2.5.0:
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-2.5.0.tgz#39a91dd7528eaf19cd42c0ee3f2c1f684606a05f"
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-2.6.0.tgz#33e4e228bdb06142d03c560ce04ec23f6c767dd7"
   dependencies:
     fast-diff "^1.1.1"
     jest-docblock "^21.0.0"
@@ -2681,9 +2979,9 @@ eslint-visitor-keys@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz#3f3180fb2e291017716acb4c9d6d5b5c34a6a81d"
 
-eslint@^4.5.0:
-  version "4.15.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.15.0.tgz#89ab38c12713eec3d13afac14e4a89e75ef08145"
+eslint@^4.18.2:
+  version "4.18.2"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.18.2.tgz#0f81267ad1012e7d2051e186a9004cc2267b8d45"
   dependencies:
     ajv "^5.3.0"
     babel-code-frame "^6.22.0"
@@ -2691,7 +2989,7 @@ eslint@^4.5.0:
     concat-stream "^1.6.0"
     cross-spawn "^5.1.0"
     debug "^3.1.0"
-    doctrine "^2.0.2"
+    doctrine "^2.1.0"
     eslint-scope "^3.7.1"
     eslint-visitor-keys "^1.0.0"
     espree "^3.5.2"
@@ -2720,24 +3018,24 @@ eslint@^4.5.0:
     semver "^5.3.0"
     strip-ansi "^4.0.0"
     strip-json-comments "~2.0.1"
-    table "^4.0.1"
+    table "4.0.2"
     text-table "~0.2.0"
 
 espree@^3.5.2:
-  version "3.5.2"
-  resolved "https://registry.yarnpkg.com/espree/-/espree-3.5.2.tgz#756ada8b979e9dcfcdb30aad8d1a9304a905e1ca"
+  version "3.5.4"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-3.5.4.tgz#b0f447187c8a8bed944b815a660bddf5deb5d1a7"
   dependencies:
-    acorn "^5.2.1"
+    acorn "^5.5.0"
     acorn-jsx "^3.0.0"
 
+esprima@^3.1.3, esprima@~3.1.0:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
+
 esprima@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.0.tgz#4499eddcd1110e0b218bacf2fa7f7f59f55ca804"
 
-esprima@~3.1.0:
-  version "3.1.3"
-  resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
-
 esquery@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/esquery/-/esquery-1.0.0.tgz#cfba8b57d7fba93f17298a8a006a04cda13d80fa"
@@ -2745,19 +3043,18 @@ esquery@^1.0.0:
     estraverse "^4.0.0"
 
 esrecurse@^4.1.0:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/esrecurse/-/esrecurse-4.2.0.tgz#fa9568d98d3823f9a41d91e902dcab9ea6e5b163"
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/esrecurse/-/esrecurse-4.2.1.tgz#007a3b9fdbc2b3bb87e4879ea19c92fdbd3942cf"
   dependencies:
     estraverse "^4.1.0"
-    object-assign "^4.0.1"
 
-estraverse@^4.0.0, estraverse@^4.1.0, estraverse@^4.1.1:
+estraverse@^4.0.0, estraverse@^4.1.0, estraverse@^4.1.1, estraverse@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.2.0.tgz#0dee3fed31fcd469618ce7342099fc1afa0bdb13"
 
-estree-walker@^0.2.1:
-  version "0.2.1"
-  resolved "https://registry.yarnpkg.com/estree-walker/-/estree-walker-0.2.1.tgz#bdafe8095383d8414d5dc2ecf4c9173b6db9412e"
+estree-walker@^0.3.0:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/estree-walker/-/estree-walker-0.3.1.tgz#e6b1a51cf7292524e7237c312e5fe6660c1ce1aa"
 
 esutils@^2.0.2:
   version "2.0.2"
@@ -2781,6 +3078,12 @@ evp_bytestokey@^1.0.0, evp_bytestokey@^1.0.3:
     md5.js "^1.3.4"
     safe-buffer "^5.1.1"
 
+exec-sh@^0.2.0:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/exec-sh/-/exec-sh-0.2.1.tgz#163b98a6e89e6b65b47c2a28d215bc1f63989c38"
+  dependencies:
+    merge "^1.1.3"
+
 execa@^0.6.3:
   version "0.6.3"
   resolved "https://registry.yarnpkg.com/execa/-/execa-0.6.3.tgz#57b69a594f081759c69e5370f0d17b9cb11658fe"
@@ -2821,6 +3124,10 @@ exit-hook@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/exit-hook/-/exit-hook-1.1.1.tgz#f05ca233b48c05d54fff07765df8507e95c02ff8"
 
+exit@^0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/exit/-/exit-0.1.2.tgz#0632638f8d877cc82107d30a0fff1a17cba1cd0c"
+
 expand-brackets@^0.1.4:
   version "0.1.5"
   resolved "https://registry.yarnpkg.com/expand-brackets/-/expand-brackets-0.1.5.tgz#df07284e342a807cd733ac5af72411e581d1177b"
@@ -2851,6 +3158,17 @@ expand-tilde@^2.0.0, expand-tilde@^2.0.2:
   dependencies:
     homedir-polyfill "^1.0.1"
 
+expect@^22.4.0:
+  version "22.4.0"
+  resolved "https://registry.yarnpkg.com/expect/-/expect-22.4.0.tgz#371edf1ae15b83b5bf5ec34b42f1584660a36c16"
+  dependencies:
+    ansi-styles "^3.2.0"
+    jest-diff "^22.4.0"
+    jest-get-type "^22.1.0"
+    jest-matcher-utils "^22.4.0"
+    jest-message-util "^22.4.0"
+    jest-regex-util "^22.1.0"
+
 extend-shallow@^1.1.2:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/extend-shallow/-/extend-shallow-1.1.4.tgz#19d6bf94dfc09d76ba711f39b872d21ff4dd9071"
@@ -2863,14 +3181,14 @@ extend-shallow@^2.0.1:
   dependencies:
     is-extendable "^0.1.0"
 
-extend-shallow@^3.0.0:
+extend-shallow@^3.0.0, extend-shallow@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/extend-shallow/-/extend-shallow-3.0.2.tgz#26a71aaf073b39fb2127172746131c2704028db8"
   dependencies:
     assign-symbols "^1.0.0"
     is-extendable "^1.0.1"
 
-extend@^3.0.0, extend@~3.0.0:
+extend@^3.0.0, extend@~3.0.0, extend@~3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
 
@@ -2888,7 +3206,7 @@ extglob@^0.3.1:
   dependencies:
     is-extglob "^1.0.0"
 
-extglob@^2.0.2:
+extglob@^2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/extglob/-/extglob-2.0.4.tgz#ad00fe4dc612a9232e8718711dc5cb5ab0285543"
   dependencies:
@@ -2927,8 +3245,8 @@ fancy-log@^1.1.0, fancy-log@^1.3.2:
     time-stamp "^1.0.0"
 
 fast-deep-equal@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-1.0.0.tgz#96256a3bc975595eb36d82e9929d060d893439ff"
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-1.1.0.tgz#c053477817c86b51daa853c81e059b733d023614"
 
 fast-diff@^1.1.1:
   version "1.1.2"
@@ -2946,6 +3264,12 @@ fastparse@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/fastparse/-/fastparse-1.1.1.tgz#d1e2643b38a94d7583b479060e6c4affc94071f8"
 
+fb-watchman@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/fb-watchman/-/fb-watchman-2.0.0.tgz#54e9abf7dfa2f26cd9b1636c588c1afc05de5d58"
+  dependencies:
+    bser "^2.0.0"
+
 figures@^1.7.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/figures/-/figures-1.7.0.tgz#cbe1e3affcf1cd44b80cadfed28dc793a9701d2e"
@@ -2970,6 +3294,13 @@ filename-regex@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/filename-regex/-/filename-regex-2.0.1.tgz#c1c4b9bee3e09725ddb106b75c1e301fe2f18b26"
 
+fileset@^2.0.2:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/fileset/-/fileset-2.0.3.tgz#8e7548a96d3cc2327ee5e674168723a333bba2a0"
+  dependencies:
+    glob "^7.0.3"
+    minimatch "^3.0.3"
+
 fill-range@^2.1.0:
   version "2.2.3"
   resolved "https://registry.yarnpkg.com/fill-range/-/fill-range-2.2.3.tgz#50b77dfd7e469bc7492470963699fe7a8485a723"
@@ -2989,14 +3320,6 @@ fill-range@^4.0.0:
     repeat-string "^1.6.1"
     to-regex-range "^2.1.0"
 
-find-cache-dir@^0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/find-cache-dir/-/find-cache-dir-0.1.1.tgz#c8defae57c8a52a8a784f9e31c57c742e993a0b9"
-  dependencies:
-    commondir "^1.0.1"
-    mkdirp "^0.5.1"
-    pkg-dir "^1.0.0"
-
 find-cache-dir@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/find-cache-dir/-/find-cache-dir-1.0.0.tgz#9288e3e9e3cc3748717d39eade17cf71fc30ee6f"
@@ -3068,9 +3391,9 @@ flat-cache@^1.2.1:
     graceful-fs "^4.1.2"
     write "^0.2.1"
 
-flow-bin@^0.59.0:
-  version "0.59.0"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.59.0.tgz#8c151ee7f09f1deed9bf0b9d1f2e8ab9d470f1bb"
+flow-bin@^0.66.0:
+  version "0.66.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.66.0.tgz#a96dde7015dc3343fd552a7b4963c02be705ca26"
 
 for-in@^1.0.1, for-in@^1.0.2:
   version "1.0.2"
@@ -3092,13 +3415,6 @@ foreach@^2.0.5:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/foreach/-/foreach-2.0.5.tgz#0bee005018aeb260d0a3af3ae658dd0136ec1b99"
 
-foreground-child@^1.5.3, foreground-child@^1.5.6:
-  version "1.5.6"
-  resolved "https://registry.yarnpkg.com/foreground-child/-/foreground-child-1.5.6.tgz#4fd71ad2dfde96789b980a5c0a295937cb2f5ce9"
-  dependencies:
-    cross-spawn "^4"
-    signal-exit "^3.0.0"
-
 forever-agent@~0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/forever-agent/-/forever-agent-0.6.1.tgz#fbc71f0c41adeb37f96c577ad1ed42d8fdacca91"
@@ -3111,6 +3427,14 @@ form-data@~2.1.1:
     combined-stream "^1.0.5"
     mime-types "^2.1.12"
 
+form-data@~2.3.1:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/form-data/-/form-data-2.3.2.tgz#4970498be604c20c005d4f5c23aecd21d6b49099"
+  dependencies:
+    asynckit "^0.4.0"
+    combined-stream "1.0.6"
+    mime-types "^2.1.12"
+
 fragment-cache@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/fragment-cache/-/fragment-cache-0.2.1.tgz#4290fad27f13e89be7f33799c6bc5a0abfff0d19"
@@ -3133,7 +3457,7 @@ fs.realpath@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
 
-fsevents@^1.0.0:
+fsevents@^1.0.0, fsevents@^1.1.1:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-1.1.3.tgz#11f82318f5fe7bb2cd22965a108e9306208216d8"
   dependencies:
@@ -3228,13 +3552,13 @@ getpass@^0.1.1:
   dependencies:
     assert-plus "^1.0.0"
 
-git-raw-commits@^1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/git-raw-commits/-/git-raw-commits-1.3.0.tgz#0bc8596e90d5ffe736f7f5546bd2d12f73abaac6"
+git-raw-commits@^1.3.0, git-raw-commits@^1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/git-raw-commits/-/git-raw-commits-1.3.4.tgz#442c3df5985b4f5689e9e43597f5194736aac001"
   dependencies:
     dargs "^4.0.1"
     lodash.template "^4.0.2"
-    meow "^3.3.0"
+    meow "^4.0.0"
     split2 "^2.0.0"
     through2 "^2.0.0"
 
@@ -3245,12 +3569,12 @@ git-remote-origin-url@^2.0.0:
     gitconfiglocal "^1.0.0"
     pify "^2.3.0"
 
-git-semver-tags@^1.2.3:
-  version "1.2.3"
-  resolved "https://registry.yarnpkg.com/git-semver-tags/-/git-semver-tags-1.2.3.tgz#188b453882bf9d7a23afd31baba537dab7388d5d"
+git-semver-tags@^1.3.0, git-semver-tags@^1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/git-semver-tags/-/git-semver-tags-1.3.4.tgz#2ceb2a355c6d7514c123c35e297067d08caf3a92"
   dependencies:
-    meow "^3.3.0"
-    semver "^5.0.1"
+    meow "^4.0.0"
+    semver "^5.5.0"
 
 gitconfiglocal@^1.0.0:
   version "1.0.0"
@@ -3271,7 +3595,7 @@ glob-parent@^2.0.0:
   dependencies:
     is-glob "^2.0.0"
 
-glob-parent@^3.0.1:
+glob-parent@^3.0.1, glob-parent@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/glob-parent/-/glob-parent-3.1.0.tgz#9e6af6299d8d3bd2bd40430832bd113df906c5ae"
   dependencies:
@@ -3301,17 +3625,6 @@ glob2base@^0.0.12:
   dependencies:
     find-index "^0.1.1"
 
-glob@7.1.1:
-  version "7.1.1"
-  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.1.tgz#805211df04faaf1c63a3600306cdf5ade50b2ec8"
-  dependencies:
-    fs.realpath "^1.0.0"
-    inflight "^1.0.4"
-    inherits "2"
-    minimatch "^3.0.2"
-    once "^1.3.0"
-    path-is-absolute "^1.0.0"
-
 glob@^4.3.1:
   version "4.5.3"
   resolved "https://registry.yarnpkg.com/glob/-/glob-4.5.3.tgz#c6cb73d3226c1efef04de3c56d012f03377ee15f"
@@ -3321,7 +3634,7 @@ glob@^4.3.1:
     minimatch "^2.0.1"
     once "^1.3.0"
 
-glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.0.6, glob@^7.1.0, glob@^7.1.2:
+glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.1.0, glob@^7.1.1, glob@^7.1.2:
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
   dependencies:
@@ -3359,8 +3672,8 @@ global-prefix@^1.0.1:
     which "^1.2.14"
 
 globals@^11.0.1, globals@^11.1.0:
-  version "11.1.0"
-  resolved "https://registry.yarnpkg.com/globals/-/globals-11.1.0.tgz#632644457f5f0e3ae711807183700ebf2e4633e4"
+  version "11.3.0"
+  resolved "https://registry.yarnpkg.com/globals/-/globals-11.3.0.tgz#e04fdb7b9796d8adac9c8f64c14837b2313378b0"
 
 globals@^9.18.0:
   version "9.18.0"
@@ -3396,8 +3709,8 @@ globule@~0.1.0:
     minimatch "~0.2.11"
 
 glogg@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/glogg/-/glogg-1.0.0.tgz#7fe0f199f57ac906cf512feead8f90ee4a284fc5"
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/glogg/-/glogg-1.0.1.tgz#dcf758e44789cc3f3d32c1f3562a3676e6a34810"
   dependencies:
     sparkles "^1.0.0"
 
@@ -3407,7 +3720,7 @@ graceful-fs@^3.0.0:
   dependencies:
     natives "^1.1.0"
 
-graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.6:
+graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.1.9:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
 
@@ -3415,20 +3728,16 @@ graceful-fs@~1.2.0:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-1.2.3.tgz#15a4806a57547cb2d2dbf27f42e89a8c3451b364"
 
-"graceful-readlink@>= 1.0.0":
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
-
-growl@1.9.2:
-  version "1.9.2"
-  resolved "https://registry.yarnpkg.com/growl/-/growl-1.9.2.tgz#0ea7743715db8d8de2c5ede1775e1b45ac85c02f"
+growly@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/growly/-/growly-1.3.0.tgz#f10748cbe76af964b7c96c93c6bcc28af120c081"
 
-gulp-babel@^8.0.0-beta.0:
-  version "8.0.0-beta.0"
-  resolved "https://registry.yarnpkg.com/gulp-babel/-/gulp-babel-8.0.0-beta.0.tgz#91f84414fec6920619fca58a8d8d62171ccf8ccf"
+gulp-babel@^8.0.0-beta.2:
+  version "8.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/gulp-babel/-/gulp-babel-8.0.0-beta.2.tgz#0ceed820eeece53da75bbb466b56db336c4136dd"
   dependencies:
-    gulp-util "^3.0.0"
-    replace-ext "0.0.1"
+    plugin-error "^1.0.1"
+    replace-ext "^1.0.0"
     through2 "^2.0.0"
     vinyl-sourcemaps-apply "^0.2.0"
 
@@ -3549,6 +3858,10 @@ har-schema@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/har-schema/-/har-schema-1.0.5.tgz#d263135f43307c02c602afc8fe95970c0151369e"
 
+har-schema@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/har-schema/-/har-schema-2.0.0.tgz#a94c2224ebcac04782a0d9035521f24735b7ec92"
+
 har-validator@~4.2.1:
   version "4.2.1"
   resolved "https://registry.yarnpkg.com/har-validator/-/har-validator-4.2.1.tgz#33481d0f1bbff600dd203d75812a6a5fba002e2a"
@@ -3556,6 +3869,13 @@ har-validator@~4.2.1:
     ajv "^4.9.1"
     har-schema "^1.0.5"
 
+har-validator@~5.0.3:
+  version "5.0.3"
+  resolved "https://registry.yarnpkg.com/har-validator/-/har-validator-5.0.3.tgz#ba402c266194f15956ef15e0fcf242993f6a7dfd"
+  dependencies:
+    ajv "^5.1.0"
+    har-schema "^2.0.0"
+
 has-ansi@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/has-ansi/-/has-ansi-2.0.0.tgz#34f5049ce1ecdf2b0649af3ef24e45ed35416d91"
@@ -3570,6 +3890,10 @@ has-flag@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-2.0.0.tgz#e8207af1cc7b30d446cc70b734b5e8be18f88d51"
 
+has-flag@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
+
 has-gulplog@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/has-gulplog/-/has-gulplog-0.1.0.tgz#6414c82913697da51590397dafb12f22967811ce"
@@ -3642,7 +3966,16 @@ hawk@3.1.3, hawk@~3.1.3:
     hoek "2.x.x"
     sntp "1.x.x"
 
-he@1.1.1, he@1.1.x:
+hawk@~6.0.2:
+  version "6.0.2"
+  resolved "https://registry.yarnpkg.com/hawk/-/hawk-6.0.2.tgz#af4d914eb065f9b5ce4d9d11c1cb2126eecc3038"
+  dependencies:
+    boom "4.x.x"
+    cryptiles "3.x.x"
+    hoek "4.x.x"
+    sntp "2.x.x"
+
+he@1.1.x:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/he/-/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
 
@@ -3658,6 +3991,17 @@ hoek@2.x.x:
   version "2.16.3"
   resolved "https://registry.yarnpkg.com/hoek/-/hoek-2.16.3.tgz#20bb7403d3cea398e91dc4710a8ff1b8274a25ed"
 
+hoek@4.x.x:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/hoek/-/hoek-4.2.1.tgz#9634502aa12c445dd5a7c5734b572bb8738aacbb"
+
+home-or-tmp@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/home-or-tmp/-/home-or-tmp-2.0.0.tgz#e36c3f2d2cae7d746a857e38d18d5f32a7882db8"
+  dependencies:
+    os-homedir "^1.0.0"
+    os-tmpdir "^1.0.1"
+
 home-or-tmp@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/home-or-tmp/-/home-or-tmp-3.0.0.tgz#57a8fe24cf33cdd524860a15821ddc25c86671fb"
@@ -3672,6 +4016,12 @@ hosted-git-info@^2.1.4:
   version "2.5.0"
   resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.5.0.tgz#6d60e34b3abbc8313062c3b798ef8d901a07af3c"
 
+html-encoding-sniffer@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/html-encoding-sniffer/-/html-encoding-sniffer-1.0.2.tgz#e70d84b94da53aa375e11fe3a351be6642ca46f8"
+  dependencies:
+    whatwg-encoding "^1.0.1"
+
 html-loader@^0.4.5:
   version "0.4.5"
   resolved "https://registry.yarnpkg.com/html-loader/-/html-loader-0.4.5.tgz#5fbcd87cd63a5c49a7fce2fe56f425e05729c68c"
@@ -3683,12 +4033,12 @@ html-loader@^0.4.5:
     object-assign "^4.1.0"
 
 html-minifier@^3.0.1:
-  version "3.5.8"
-  resolved "https://registry.yarnpkg.com/html-minifier/-/html-minifier-3.5.8.tgz#5ccdb1f73a0d654e6090147511f6e6b2ee312700"
+  version "3.5.10"
+  resolved "https://registry.yarnpkg.com/html-minifier/-/html-minifier-3.5.10.tgz#8522c772c388db81aa5c26f62033302d906ea1c7"
   dependencies:
     camel-case "3.0.x"
     clean-css "4.1.x"
-    commander "2.12.x"
+    commander "2.14.x"
     he "1.1.x"
     ncname "1.0.x"
     param-case "2.1.x"
@@ -3718,6 +4068,14 @@ http-signature@~1.1.0:
     jsprim "^1.2.2"
     sshpk "^1.7.0"
 
+http-signature@~1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/http-signature/-/http-signature-1.2.0.tgz#9aecd925114772f3d95b65a60abb8f7c18fbace1"
+  dependencies:
+    assert-plus "^1.0.0"
+    jsprim "^1.2.2"
+    sshpk "^1.7.0"
+
 https-browserify@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/https-browserify/-/https-browserify-1.0.0.tgz#ec06c10e0a34c0f2faf199f7fd7fc78fffd03c73"
@@ -3734,7 +4092,7 @@ husky@^0.14.3:
     normalize-path "^1.0.0"
     strip-indent "^2.0.0"
 
-iconv-lite@^0.4.17, iconv-lite@~0.4.13:
+iconv-lite@0.4.19, iconv-lite@^0.4.17, iconv-lite@~0.4.13:
   version "0.4.19"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.19.tgz#f7468f60135f5e5dad3399c0a81be9a1603a082b"
 
@@ -3746,6 +4104,13 @@ ignore@^3.3.3:
   version "3.3.7"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.3.7.tgz#612289bfb3c220e186a58118618d5be8c1bab021"
 
+import-local@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/import-local/-/import-local-1.0.0.tgz#5e4ffdc03f4fe6c009c6729beb29631c2f8227bc"
+  dependencies:
+    pkg-dir "^2.0.0"
+    resolve-cwd "^2.0.0"
+
 imurmurhash@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"
@@ -3819,8 +4184,8 @@ inquirer@^3.0.6:
     through "^2.3.6"
 
 insert-module-globals@^7.0.0:
-  version "7.0.1"
-  resolved "https://registry.yarnpkg.com/insert-module-globals/-/insert-module-globals-7.0.1.tgz#c03bf4e01cb086d5b5e5ace8ad0afe7889d638c3"
+  version "7.0.2"
+  resolved "https://registry.yarnpkg.com/insert-module-globals/-/insert-module-globals-7.0.2.tgz#012c56baa7d3307a8b417d4ec5270cf9741c18f4"
   dependencies:
     JSONStream "^1.0.3"
     combine-source-map "~0.7.1"
@@ -3836,8 +4201,8 @@ interpret@^1.0.0:
   resolved "https://registry.yarnpkg.com/interpret/-/interpret-1.1.0.tgz#7ed1b1410c6a0e0f78cf95d3b8440c63f78b8614"
 
 invariant@^2.2.0, invariant@^2.2.2:
-  version "2.2.2"
-  resolved "https://registry.yarnpkg.com/invariant/-/invariant-2.2.2.tgz#9e1f56ac0acdb6bf303306f338be3b204ae60360"
+  version "2.2.3"
+  resolved "https://registry.yarnpkg.com/invariant/-/invariant-2.2.3.tgz#1a827dfde7dcbd7c323f0ca826be8fa7c5e9d688"
   dependencies:
     loose-envify "^1.0.0"
 
@@ -3918,7 +4283,7 @@ is-descriptor@^0.1.0:
     is-data-descriptor "^0.1.4"
     kind-of "^5.0.0"
 
-is-descriptor@^1.0.0:
+is-descriptor@^1.0.0, is-descriptor@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-descriptor/-/is-descriptor-1.0.2.tgz#3b159746a66604b04f8c81524ba365c5f14d86ec"
   dependencies:
@@ -3974,6 +4339,10 @@ is-fullwidth-code-point@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz#a3b30a5c4f199183167aaab93beefae3ddfb654f"
 
+is-generator-fn@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-generator-fn/-/is-generator-fn-1.0.0.tgz#969d49e1bb3329f6bb7f09089be26578b2ddd46a"
+
 is-glob@^2.0.0, is-glob@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/is-glob/-/is-glob-2.0.1.tgz#d096f926a3ded5600f3fdfd91198cb0888c2d863"
@@ -4008,6 +4377,10 @@ is-number@^3.0.0:
   dependencies:
     kind-of "^3.0.2"
 
+is-number@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/is-number/-/is-number-4.0.0.tgz#0026e37f5454d73e356dfe6564699867c6a7f0ff"
+
 is-obj@^1.0.0, is-obj@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-obj/-/is-obj-1.0.1.tgz#3e4729ac1f5fde025cd7d83a896dab9f4f67db0f"
@@ -4018,11 +4391,11 @@ is-observable@^0.2.0:
   dependencies:
     symbol-observable "^0.2.2"
 
-is-odd@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/is-odd/-/is-odd-1.0.0.tgz#3b8a932eb028b3775c39bb09e91767accdb69088"
+is-odd@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/is-odd/-/is-odd-2.0.0.tgz#7646624671fd7ea558ccd9a2795182f2958f1b24"
   dependencies:
-    is-number "^3.0.0"
+    is-number "^4.0.0"
 
 is-path-cwd@^1.0.0:
   version "1.0.0"
@@ -4079,8 +4452,8 @@ is-relative@^1.0.0:
     is-unc-path "^1.0.0"
 
 is-resolvable@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/is-resolvable/-/is-resolvable-1.0.1.tgz#acca1cd36dbe44b974b924321555a70ba03b1cf4"
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/is-resolvable/-/is-resolvable-1.1.0.tgz#fb18f87ce1feb925169c9a407c19318a3206ed88"
 
 is-stream@^1.0.1, is-stream@^1.1.0:
   version "1.1.0"
@@ -4114,9 +4487,9 @@ is-utf8@^0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-utf8/-/is-utf8-0.2.1.tgz#4b0da1442104d1b336340e80797e865cf39f7d72"
 
-is-windows@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.1.tgz#310db70f742d259a16a369202b51af84233310d9"
+is-windows@^1.0.1, is-windows@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.2.tgz#d1850eb9791ecd18e6182ce12a30f396634bb19d"
 
 isarray@0.0.1, isarray@~0.0.1:
   version "0.0.1"
@@ -4144,9 +4517,25 @@ isstream@~0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
 
-istanbul-lib-coverage@^1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/istanbul-lib-coverage/-/istanbul-lib-coverage-1.1.1.tgz#73bfb998885299415c93d38a3e9adf784a77a9da"
+istanbul-api@^1.1.14:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/istanbul-api/-/istanbul-api-1.2.2.tgz#e17cd519dd5ec4141197f246fdf380b75487f3b1"
+  dependencies:
+    async "^2.1.4"
+    fileset "^2.0.2"
+    istanbul-lib-coverage "^1.1.2"
+    istanbul-lib-hook "^1.1.0"
+    istanbul-lib-instrument "^1.9.2"
+    istanbul-lib-report "^1.1.3"
+    istanbul-lib-source-maps "^1.2.3"
+    istanbul-reports "^1.1.4"
+    js-yaml "^3.7.0"
+    mkdirp "^0.5.1"
+    once "^1.4.0"
+
+istanbul-lib-coverage@^1.1.1, istanbul-lib-coverage@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/istanbul-lib-coverage/-/istanbul-lib-coverage-1.1.2.tgz#4113c8ff6b7a40a1ef7350b01016331f63afde14"
 
 istanbul-lib-hook@^1.1.0:
   version "1.1.0"
@@ -4154,51 +4543,287 @@ istanbul-lib-hook@^1.1.0:
   dependencies:
     append-transform "^0.4.0"
 
-istanbul-lib-instrument@^1.7.5, istanbul-lib-instrument@^1.9.1:
-  version "1.9.1"
-  resolved "https://registry.yarnpkg.com/istanbul-lib-instrument/-/istanbul-lib-instrument-1.9.1.tgz#250b30b3531e5d3251299fdd64b0b2c9db6b558e"
+istanbul-lib-instrument@^1.7.5, istanbul-lib-instrument@^1.8.0, istanbul-lib-instrument@^1.9.2:
+  version "1.9.2"
+  resolved "https://registry.yarnpkg.com/istanbul-lib-instrument/-/istanbul-lib-instrument-1.9.2.tgz#84905bf47f7e0b401d6b840da7bad67086b4aab6"
   dependencies:
     babel-generator "^6.18.0"
     babel-template "^6.16.0"
     babel-traverse "^6.18.0"
     babel-types "^6.18.0"
     babylon "^6.18.0"
-    istanbul-lib-coverage "^1.1.1"
+    istanbul-lib-coverage "^1.1.2"
     semver "^5.3.0"
 
-istanbul-lib-report@^1.1.2:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/istanbul-lib-report/-/istanbul-lib-report-1.1.2.tgz#922be27c13b9511b979bd1587359f69798c1d425"
+istanbul-lib-report@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/istanbul-lib-report/-/istanbul-lib-report-1.1.3.tgz#2df12188c0fa77990c0d2176d2d0ba3394188259"
   dependencies:
-    istanbul-lib-coverage "^1.1.1"
+    istanbul-lib-coverage "^1.1.2"
     mkdirp "^0.5.1"
     path-parse "^1.0.5"
     supports-color "^3.1.2"
 
-istanbul-lib-source-maps@^1.2.2:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/istanbul-lib-source-maps/-/istanbul-lib-source-maps-1.2.2.tgz#750578602435f28a0c04ee6d7d9e0f2960e62c1c"
+istanbul-lib-source-maps@^1.2.1, istanbul-lib-source-maps@^1.2.3:
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/istanbul-lib-source-maps/-/istanbul-lib-source-maps-1.2.3.tgz#20fb54b14e14b3fb6edb6aca3571fd2143db44e6"
   dependencies:
     debug "^3.1.0"
-    istanbul-lib-coverage "^1.1.1"
+    istanbul-lib-coverage "^1.1.2"
     mkdirp "^0.5.1"
     rimraf "^2.6.1"
     source-map "^0.5.3"
 
-istanbul-reports@^1.1.3:
-  version "1.1.3"
-  resolved "https://registry.yarnpkg.com/istanbul-reports/-/istanbul-reports-1.1.3.tgz#3b9e1e8defb6d18b1d425da8e8b32c5a163f2d10"
+istanbul-reports@^1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/istanbul-reports/-/istanbul-reports-1.1.4.tgz#5ccba5e22b7b5a5d91d5e0a830f89be334bf97bd"
   dependencies:
     handlebars "^4.0.3"
 
+jest-changed-files@^22.2.0:
+  version "22.2.0"
+  resolved "https://registry.yarnpkg.com/jest-changed-files/-/jest-changed-files-22.2.0.tgz#517610c4a8ca0925bdc88b0ca53bd678aa8d019e"
+  dependencies:
+    throat "^4.0.0"
+
+jest-cli@^22.4.2:
+  version "22.4.2"
+  resolved "https://registry.yarnpkg.com/jest-cli/-/jest-cli-22.4.2.tgz#e6546dc651e13d164481aa3e76e53ac4f4edab06"
+  dependencies:
+    ansi-escapes "^3.0.0"
+    chalk "^2.0.1"
+    exit "^0.1.2"
+    glob "^7.1.2"
+    graceful-fs "^4.1.11"
+    import-local "^1.0.0"
+    is-ci "^1.0.10"
+    istanbul-api "^1.1.14"
+    istanbul-lib-coverage "^1.1.1"
+    istanbul-lib-instrument "^1.8.0"
+    istanbul-lib-source-maps "^1.2.1"
+    jest-changed-files "^22.2.0"
+    jest-config "^22.4.2"
+    jest-environment-jsdom "^22.4.1"
+    jest-get-type "^22.1.0"
+    jest-haste-map "^22.4.2"
+    jest-message-util "^22.4.0"
+    jest-regex-util "^22.1.0"
+    jest-resolve-dependencies "^22.1.0"
+    jest-runner "^22.4.2"
+    jest-runtime "^22.4.2"
+    jest-snapshot "^22.4.0"
+    jest-util "^22.4.1"
+    jest-validate "^22.4.2"
+    jest-worker "^22.2.2"
+    micromatch "^2.3.11"
+    node-notifier "^5.2.1"
+    realpath-native "^1.0.0"
+    rimraf "^2.5.4"
+    slash "^1.0.0"
+    string-length "^2.0.0"
+    strip-ansi "^4.0.0"
+    which "^1.2.12"
+    yargs "^10.0.3"
+
+jest-config@^22.4.2:
+  version "22.4.2"
+  resolved "https://registry.yarnpkg.com/jest-config/-/jest-config-22.4.2.tgz#580ba5819bf81a5e48f4fd470e8b81834f45c855"
+  dependencies:
+    chalk "^2.0.1"
+    glob "^7.1.1"
+    jest-environment-jsdom "^22.4.1"
+    jest-environment-node "^22.4.1"
+    jest-get-type "^22.1.0"
+    jest-jasmine2 "^22.4.2"
+    jest-regex-util "^22.1.0"
+    jest-resolve "^22.4.2"
+    jest-util "^22.4.1"
+    jest-validate "^22.4.2"
+    pretty-format "^22.4.0"
+
+jest-diff@^22.4.0:
+  version "22.4.0"
+  resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-22.4.0.tgz#384c2b78519ca44ca126382df53f134289232525"
+  dependencies:
+    chalk "^2.0.1"
+    diff "^3.2.0"
+    jest-get-type "^22.1.0"
+    pretty-format "^22.4.0"
+
 jest-docblock@^21.0.0:
   version "21.2.0"
   resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-21.2.0.tgz#51529c3b30d5fd159da60c27ceedc195faf8d414"
 
+jest-docblock@^22.4.0:
+  version "22.4.0"
+  resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-22.4.0.tgz#dbf1877e2550070cfc4d9b07a55775a0483159b8"
+  dependencies:
+    detect-newline "^2.1.0"
+
+jest-environment-jsdom@^22.4.1:
+  version "22.4.1"
+  resolved "https://registry.yarnpkg.com/jest-environment-jsdom/-/jest-environment-jsdom-22.4.1.tgz#754f408872441740100d3917e5ec40c74de6447f"
+  dependencies:
+    jest-mock "^22.2.0"
+    jest-util "^22.4.1"
+    jsdom "^11.5.1"
+
+jest-environment-node@^22.4.1:
+  version "22.4.1"
+  resolved "https://registry.yarnpkg.com/jest-environment-node/-/jest-environment-node-22.4.1.tgz#418850eb654596b8d6e36c2021cbedbc23df8e16"
+  dependencies:
+    jest-mock "^22.2.0"
+    jest-util "^22.4.1"
+
 jest-get-type@^21.2.0:
   version "21.2.0"
   resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-21.2.0.tgz#f6376ab9db4b60d81e39f30749c6c466f40d4a23"
 
+jest-get-type@^22.1.0:
+  version "22.1.0"
+  resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-22.1.0.tgz#4e90af298ed6181edc85d2da500dbd2753e0d5a9"
+
+jest-haste-map@^22.4.2:
+  version "22.4.2"
+  resolved "https://registry.yarnpkg.com/jest-haste-map/-/jest-haste-map-22.4.2.tgz#a90178e66146d4378bb076345a949071f3b015b4"
+  dependencies:
+    fb-watchman "^2.0.0"
+    graceful-fs "^4.1.11"
+    jest-docblock "^22.4.0"
+    jest-serializer "^22.4.0"
+    jest-worker "^22.2.2"
+    micromatch "^2.3.11"
+    sane "^2.0.0"
+
+jest-jasmine2@^22.4.2:
+  version "22.4.2"
+  resolved "https://registry.yarnpkg.com/jest-jasmine2/-/jest-jasmine2-22.4.2.tgz#dfd3d259579ed6f52510d8f1ab692808f0d40691"
+  dependencies:
+    chalk "^2.0.1"
+    co "^4.6.0"
+    expect "^22.4.0"
+    graceful-fs "^4.1.11"
+    is-generator-fn "^1.0.0"
+    jest-diff "^22.4.0"
+    jest-matcher-utils "^22.4.0"
+    jest-message-util "^22.4.0"
+    jest-snapshot "^22.4.0"
+    jest-util "^22.4.1"
+    source-map-support "^0.5.0"
+
+jest-leak-detector@^22.4.0:
+  version "22.4.0"
+  resolved "https://registry.yarnpkg.com/jest-leak-detector/-/jest-leak-detector-22.4.0.tgz#64da77f05b001c96d2062226e079f89989c4aa2f"
+  dependencies:
+    pretty-format "^22.4.0"
+
+jest-matcher-utils@^22.4.0:
+  version "22.4.0"
+  resolved "https://registry.yarnpkg.com/jest-matcher-utils/-/jest-matcher-utils-22.4.0.tgz#d55f5faf2270462736bdf7c7485ee931c9d4b6a1"
+  dependencies:
+    chalk "^2.0.1"
+    jest-get-type "^22.1.0"
+    pretty-format "^22.4.0"
+
+jest-message-util@^22.4.0:
+  version "22.4.0"
+  resolved "https://registry.yarnpkg.com/jest-message-util/-/jest-message-util-22.4.0.tgz#e3d861df16d2fee60cb2bc8feac2188a42579642"
+  dependencies:
+    "@babel/code-frame" "^7.0.0-beta.35"
+    chalk "^2.0.1"
+    micromatch "^2.3.11"
+    slash "^1.0.0"
+    stack-utils "^1.0.1"
+
+jest-mock@^22.2.0:
+  version "22.2.0"
+  resolved "https://registry.yarnpkg.com/jest-mock/-/jest-mock-22.2.0.tgz#444b3f9488a7473adae09bc8a77294afded397a7"
+
+jest-regex-util@^22.1.0:
+  version "22.1.0"
+  resolved "https://registry.yarnpkg.com/jest-regex-util/-/jest-regex-util-22.1.0.tgz#5daf2fe270074b6da63e5d85f1c9acc866768f53"
+
+jest-resolve-dependencies@^22.1.0:
+  version "22.1.0"
+  resolved "https://registry.yarnpkg.com/jest-resolve-dependencies/-/jest-resolve-dependencies-22.1.0.tgz#340e4139fb13315cd43abc054e6c06136be51e31"
+  dependencies:
+    jest-regex-util "^22.1.0"
+
+jest-resolve@^22.4.2:
+  version "22.4.2"
+  resolved "https://registry.yarnpkg.com/jest-resolve/-/jest-resolve-22.4.2.tgz#25d88aa4147462c9c1c6a1ba16250d3794c24d00"
+  dependencies:
+    browser-resolve "^1.11.2"
+    chalk "^2.0.1"
+
+jest-runner@^22.4.2:
+  version "22.4.2"
+  resolved "https://registry.yarnpkg.com/jest-runner/-/jest-runner-22.4.2.tgz#19390ea9d99f768973e16f95a1efa351c0017e87"
+  dependencies:
+    exit "^0.1.2"
+    jest-config "^22.4.2"
+    jest-docblock "^22.4.0"
+    jest-haste-map "^22.4.2"
+    jest-jasmine2 "^22.4.2"
+    jest-leak-detector "^22.4.0"
+    jest-message-util "^22.4.0"
+    jest-runtime "^22.4.2"
+    jest-util "^22.4.1"
+    jest-worker "^22.2.2"
+    throat "^4.0.0"
+
+jest-runtime@^22.4.2:
+  version "22.4.2"
+  resolved "https://registry.yarnpkg.com/jest-runtime/-/jest-runtime-22.4.2.tgz#0de0444f65ce15ee4f2e0055133fc7c17b9168f3"
+  dependencies:
+    babel-core "^6.0.0"
+    babel-jest "^22.4.1"
+    babel-plugin-istanbul "^4.1.5"
+    chalk "^2.0.1"
+    convert-source-map "^1.4.0"
+    exit "^0.1.2"
+    graceful-fs "^4.1.11"
+    jest-config "^22.4.2"
+    jest-haste-map "^22.4.2"
+    jest-regex-util "^22.1.0"
+    jest-resolve "^22.4.2"
+    jest-util "^22.4.1"
+    jest-validate "^22.4.2"
+    json-stable-stringify "^1.0.1"
+    micromatch "^2.3.11"
+    realpath-native "^1.0.0"
+    slash "^1.0.0"
+    strip-bom "3.0.0"
+    write-file-atomic "^2.1.0"
+    yargs "^10.0.3"
+
+jest-serializer@^22.4.0:
+  version "22.4.0"
+  resolved "https://registry.yarnpkg.com/jest-serializer/-/jest-serializer-22.4.0.tgz#b5d145b98c4b0d2c20ab686609adbb81fe23b566"
+
+jest-snapshot@^22.4.0:
+  version "22.4.0"
+  resolved "https://registry.yarnpkg.com/jest-snapshot/-/jest-snapshot-22.4.0.tgz#03d3ce63f8fa7352388afc6a3c8b5ccc3a180ed7"
+  dependencies:
+    chalk "^2.0.1"
+    jest-diff "^22.4.0"
+    jest-matcher-utils "^22.4.0"
+    mkdirp "^0.5.1"
+    natural-compare "^1.4.0"
+    pretty-format "^22.4.0"
+
+jest-util@^22.4.1:
+  version "22.4.1"
+  resolved "https://registry.yarnpkg.com/jest-util/-/jest-util-22.4.1.tgz#dd17c3bdb067f8e90591563ec0c42bf847dc249f"
+  dependencies:
+    callsites "^2.0.0"
+    chalk "^2.0.1"
+    graceful-fs "^4.1.11"
+    is-ci "^1.0.10"
+    jest-message-util "^22.4.0"
+    mkdirp "^0.5.1"
+    source-map "^0.6.0"
+
 jest-validate@^21.1.0:
   version "21.2.1"
   resolved "https://registry.yarnpkg.com/jest-validate/-/jest-validate-21.2.1.tgz#cc0cbca653cd54937ba4f2a111796774530dd3c7"
@@ -4208,13 +4833,36 @@ jest-validate@^21.1.0:
     leven "^2.1.0"
     pretty-format "^21.2.1"
 
+jest-validate@^22.4.2:
+  version "22.4.2"
+  resolved "https://registry.yarnpkg.com/jest-validate/-/jest-validate-22.4.2.tgz#e789a4e056173bf97fe797a2df2d52105c57d4f4"
+  dependencies:
+    chalk "^2.0.1"
+    jest-config "^22.4.2"
+    jest-get-type "^22.1.0"
+    leven "^2.1.0"
+    pretty-format "^22.4.0"
+
+jest-worker@^22.2.2:
+  version "22.2.2"
+  resolved "https://registry.yarnpkg.com/jest-worker/-/jest-worker-22.2.2.tgz#c1f5dc39976884b81f68ec50cb8532b2cbab3390"
+  dependencies:
+    merge-stream "^1.0.1"
+
+jest@^22.4.2:
+  version "22.4.2"
+  resolved "https://registry.yarnpkg.com/jest/-/jest-22.4.2.tgz#34012834a49bf1bdd3bc783850ab44e4499afc20"
+  dependencies:
+    import-local "^1.0.0"
+    jest-cli "^22.4.2"
+
 js-tokens@^3.0.0, js-tokens@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
 
-js-yaml@^3.9.0, js-yaml@^3.9.1:
-  version "3.10.0"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.10.0.tgz#2e78441646bd4682e963f22b6e92823c309c62dc"
+js-yaml@^3.2.1, js-yaml@^3.7.0, js-yaml@^3.9.0, js-yaml@^3.9.1:
+  version "3.11.0"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.11.0.tgz#597c1a8bd57152f26d622ce4117851a51f5ebaef"
   dependencies:
     argparse "^1.0.7"
     esprima "^4.0.0"
@@ -4223,6 +4871,37 @@ jsbn@~0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
 
+jsdom@^11.5.1:
+  version "11.6.2"
+  resolved "https://registry.yarnpkg.com/jsdom/-/jsdom-11.6.2.tgz#25d1ef332d48adf77fc5221fe2619967923f16bb"
+  dependencies:
+    abab "^1.0.4"
+    acorn "^5.3.0"
+    acorn-globals "^4.1.0"
+    array-equal "^1.0.0"
+    browser-process-hrtime "^0.1.2"
+    content-type-parser "^1.0.2"
+    cssom ">= 0.3.2 < 0.4.0"
+    cssstyle ">= 0.2.37 < 0.3.0"
+    domexception "^1.0.0"
+    escodegen "^1.9.0"
+    html-encoding-sniffer "^1.0.2"
+    left-pad "^1.2.0"
+    nwmatcher "^1.4.3"
+    parse5 "4.0.0"
+    pn "^1.1.0"
+    request "^2.83.0"
+    request-promise-native "^1.0.5"
+    sax "^1.2.4"
+    symbol-tree "^3.2.2"
+    tough-cookie "^2.3.3"
+    w3c-hr-time "^1.0.1"
+    webidl-conversions "^4.0.2"
+    whatwg-encoding "^1.0.3"
+    whatwg-url "^6.4.0"
+    ws "^4.0.0"
+    xml-name-validator "^3.0.0"
+
 jsesc@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-1.3.0.tgz#46c3fec8c1892b12b0833db9bc7622176dbab34b"
@@ -4271,10 +4950,6 @@ json-stringify-safe@^5.0.1, json-stringify-safe@~5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz#1296a2d58fd45f19a0f6ce01d65701e2c735b6eb"
 
-json3@3.3.2:
-  version "3.3.2"
-  resolved "https://registry.yarnpkg.com/json3/-/json3-3.3.2.tgz#3c0434743df93e2f5c42aee7b19bcb483575f4e1"
-
 json5@^0.5.0, json5@^0.5.1:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/json5/-/json5-0.5.1.tgz#1eade7acc012034ad84e2396767ead9fa5495821"
@@ -4322,7 +4997,7 @@ kind-of@^4.0.0:
   dependencies:
     is-buffer "^1.1.5"
 
-kind-of@^5.0.0, kind-of@^5.0.2:
+kind-of@^5.0.0:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-5.1.0.tgz#729c91e2d857b7a419a1f9aa65685c4c33f5845d"
 
@@ -4330,6 +5005,12 @@ kind-of@^6.0.0, kind-of@^6.0.2:
   version "6.0.2"
   resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-6.0.2.tgz#01146b36a6218e64e58f3a8d66de5d7fc6f6d051"
 
+klaw@^2.1.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/klaw/-/klaw-2.1.1.tgz#42b76894701169cc910fd0d19ce677b5fb378af1"
+  dependencies:
+    graceful-fs "^4.1.9"
+
 labeled-stream-splicer@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/labeled-stream-splicer/-/labeled-stream-splicer-2.0.0.tgz#a52e1d138024c00b86b1c0c91f677918b8ae0a59"
@@ -4354,6 +5035,10 @@ lcid@^1.0.0:
   dependencies:
     invert-kv "^1.0.0"
 
+left-pad@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/left-pad/-/left-pad-1.2.0.tgz#d30a73c6b8201d8f7d8e7956ba9616087a68e0ee"
+
 lerna-changelog@^0.5.0:
   version "0.5.0"
   resolved "https://registry.yarnpkg.com/lerna-changelog/-/lerna-changelog-0.5.0.tgz#1617a8193a1309451ffa1e686b425faf0424b3f8"
@@ -4437,8 +5122,8 @@ liftoff@^2.1.0:
     resolve "^1.1.7"
 
 lint-staged@^6.0.1:
-  version "6.0.1"
-  resolved "https://registry.yarnpkg.com/lint-staged/-/lint-staged-6.0.1.tgz#855f2993ab4a265430e2fd9828427e648d65e6b4"
+  version "6.1.1"
+  resolved "https://registry.yarnpkg.com/lint-staged/-/lint-staged-6.1.1.tgz#cd08c4d9b8ccc2d37198d1c47ce77d22be6cf324"
   dependencies:
     app-root-path "^2.0.0"
     chalk "^2.1.0"
@@ -4458,7 +5143,7 @@ lint-staged@^6.0.1:
     p-map "^1.1.1"
     path-is-inside "^1.0.2"
     pify "^3.0.0"
-    staged-git-files "0.0.4"
+    staged-git-files "1.0.0"
     stringify-object "^3.2.0"
 
 listr-silent-renderer@^1.1.1:
@@ -4528,6 +5213,15 @@ load-json-file@^2.0.0:
     pify "^2.0.0"
     strip-bom "^3.0.0"
 
+load-json-file@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-4.0.0.tgz#2f5f45ab91e33216234fd53adab668eb4ec0993b"
+  dependencies:
+    graceful-fs "^4.1.2"
+    parse-json "^4.0.0"
+    pify "^3.0.0"
+    strip-bom "^3.0.0"
+
 loader-runner@^2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/loader-runner/-/loader-runner-2.3.0.tgz#f482aea82d543e07921700d5a46ef26fdac6b8a2"
@@ -4547,21 +5241,10 @@ locate-path@^2.0.0:
     p-locate "^2.0.0"
     path-exists "^3.0.0"
 
-lodash._baseassign@^3.0.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/lodash._baseassign/-/lodash._baseassign-3.2.0.tgz#8c38a099500f215ad09e59f1722fd0c52bfe0a4e"
-  dependencies:
-    lodash._basecopy "^3.0.0"
-    lodash.keys "^3.0.0"
-
 lodash._basecopy@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/lodash._basecopy/-/lodash._basecopy-3.0.1.tgz#8da0e6a876cf344c0ad8a54882111dd3c5c7ca36"
 
-lodash._basecreate@^3.0.0:
-  version "3.0.3"
-  resolved "https://registry.yarnpkg.com/lodash._basecreate/-/lodash._basecreate-3.0.3.tgz#1bc661614daa7fc311b7d03bf16806a0213cf821"
-
 lodash._basetostring@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/lodash._basetostring/-/lodash._basetostring-3.0.1.tgz#d1861d877f824a52f669832dcaf3ee15566a07d5"
@@ -4598,14 +5281,6 @@ lodash.clone@^4.3.2:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.clone/-/lodash.clone-4.5.0.tgz#195870450f5a13192478df4bc3d23d2dea1907b6"
 
-lodash.create@3.1.1:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/lodash.create/-/lodash.create-3.1.1.tgz#d7f2849f0dbda7e04682bb8cd72ab022461debe7"
-  dependencies:
-    lodash._baseassign "^3.0.0"
-    lodash._basecreate "^3.0.0"
-    lodash._isiterateecall "^3.0.0"
-
 lodash.escape@^3.0.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/lodash.escape/-/lodash.escape-3.2.0.tgz#995ee0dc18c1b48cc92effae71a10aab5b487698"
@@ -4640,6 +5315,10 @@ lodash.some@^4.2.2:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/lodash.some/-/lodash.some-4.6.0.tgz#1bb9f314ef6b8baded13b549169b2a945eb68e4d"
 
+lodash.sortby@^4.7.0:
+  version "4.7.0"
+  resolved "https://registry.yarnpkg.com/lodash.sortby/-/lodash.sortby-4.7.0.tgz#edd14c824e2cc9c1e0b0a1b42bb5210516a42438"
+
 lodash.template@^3.0.0:
   version "3.6.2"
   resolved "https://registry.yarnpkg.com/lodash.template/-/lodash.template-3.6.2.tgz#f8cdecc6169a255be9098ae8b0c53d378931d14f"
@@ -4674,9 +5353,9 @@ lodash.templatesettings@^4.0.0:
   dependencies:
     lodash._reinterpolate "~3.0.0"
 
-lodash@^4.0.0, lodash@^4.1.0, lodash@^4.13.1, lodash@^4.14.0, lodash@^4.15.0, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.2.1, lodash@^4.3.0:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
+lodash@^4.13.1, lodash@^4.14.0, lodash@^4.15.0, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.2.1, lodash@^4.3.0:
+  version "4.17.5"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.5.tgz#99a92d65c0272debe8c96b6057bc8fbfa3bed511"
 
 lodash@~1.0.1:
   version "1.0.2"
@@ -4734,8 +5413,8 @@ lru-cache@^4.0.1:
     yallist "^2.1.2"
 
 make-dir@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/make-dir/-/make-dir-1.1.0.tgz#19b4369fe48c116f53c2af95ad102c0e39e85d51"
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/make-dir/-/make-dir-1.2.0.tgz#6d6a49eead4aae296c53bbf3a1a008bd6c89469b"
   dependencies:
     pify "^3.0.0"
 
@@ -4746,8 +5425,8 @@ make-error-cause@^1.1.1:
     make-error "^1.2.0"
 
 make-error@^1.2.0:
-  version "1.3.2"
-  resolved "https://registry.yarnpkg.com/make-error/-/make-error-1.3.2.tgz#8762ffad2444dd8ff1f7c819629fa28e24fea1c4"
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/make-error/-/make-error-1.3.4.tgz#19978ed575f9e9545d2ff8c13e33b5d18a67d535"
 
 make-iterator@^1.0.0:
   version "1.0.0"
@@ -4755,6 +5434,12 @@ make-iterator@^1.0.0:
   dependencies:
     kind-of "^3.1.0"
 
+makeerror@1.0.x:
+  version "1.0.11"
+  resolved "https://registry.yarnpkg.com/makeerror/-/makeerror-1.0.11.tgz#e01a5c9109f2af79660e4e8b9587790184f5a96c"
+  dependencies:
+    tmpl "1.0.x"
+
 map-cache@^0.2.0, map-cache@^0.2.2:
   version "0.2.2"
   resolved "https://registry.yarnpkg.com/map-cache/-/map-cache-0.2.2.tgz#c32abd0bd6525d9b051645bb4f26ac5dc98a0dbf"
@@ -4763,22 +5448,16 @@ map-obj@^1.0.0, map-obj@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/map-obj/-/map-obj-1.0.1.tgz#d933ceb9205d82bdcf4886f6742bdc2b4dea146d"
 
+map-obj@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/map-obj/-/map-obj-2.0.0.tgz#a65cd29087a92598b8791257a523e021222ac1f9"
+
 map-visit@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/map-visit/-/map-visit-1.0.0.tgz#ecdca8f13144e660f1b5bd41f12f3479d98dfb8f"
   dependencies:
     object-visit "^1.0.0"
 
-md5-hex@^1.2.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/md5-hex/-/md5-hex-1.3.0.tgz#d2c4afe983c4370662179b8cad145219135046c4"
-  dependencies:
-    md5-o-matic "^0.1.1"
-
-md5-o-matic@^0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/md5-o-matic/-/md5-o-matic-0.1.1.tgz#822bccd65e117c514fab176b25945d54100a03c3"
-
 md5.js@^1.3.4:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/md5.js/-/md5.js-1.3.4.tgz#e9bdbde94a20a5ac18b04340fc5764d5b09d901d"
@@ -4799,7 +5478,7 @@ memory-fs@^0.4.0, memory-fs@^0.4.1, memory-fs@~0.4.1:
     errno "^0.1.3"
     readable-stream "^2.0.1"
 
-meow@^3.3.0, meow@^3.7.0:
+meow@^3.3.0:
   version "3.7.0"
   resolved "https://registry.yarnpkg.com/meow/-/meow-3.7.0.tgz#72cb668b425228290abbfa856892587308a801fb"
   dependencies:
@@ -4814,11 +5493,19 @@ meow@^3.3.0, meow@^3.7.0:
     redent "^1.0.0"
     trim-newlines "^1.0.0"
 
-merge-source-map@^1.0.2:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/merge-source-map/-/merge-source-map-1.1.0.tgz#2fdde7e6020939f70906a68f2d7ae685e4c8c646"
+meow@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/meow/-/meow-4.0.0.tgz#fd5855dd008db5b92c552082db1c307cba20b29d"
   dependencies:
-    source-map "^0.6.1"
+    camelcase-keys "^4.0.0"
+    decamelize-keys "^1.0.0"
+    loud-rejection "^1.0.0"
+    minimist "^1.1.3"
+    minimist-options "^3.0.1"
+    normalize-package-data "^2.3.4"
+    read-pkg-up "^3.0.0"
+    redent "^2.0.0"
+    trim-newlines "^2.0.0"
 
 merge-stream@^1.0.1:
   version "1.0.1"
@@ -4826,6 +5513,10 @@ merge-stream@^1.0.1:
   dependencies:
     readable-stream "^2.0.1"
 
+merge@^1.1.3:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/merge/-/merge-1.2.0.tgz#7531e39d4949c281a66b8c5a6e0265e8b05894da"
+
 micromatch@^2.1.5, micromatch@^2.3.11:
   version "2.3.11"
   resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-2.3.11.tgz#86677c97d1720b363431d04d0d15293bd38c1565"
@@ -4844,19 +5535,19 @@ micromatch@^2.1.5, micromatch@^2.3.11:
     parse-glob "^3.0.4"
     regex-cache "^0.4.2"
 
-micromatch@^3.0.4:
-  version "3.1.5"
-  resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-3.1.5.tgz#d05e168c206472dfbca985bfef4f57797b4cd4ba"
+micromatch@^3.0.4, micromatch@^3.1.4:
+  version "3.1.9"
+  resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-3.1.9.tgz#15dc93175ae39e52e93087847096effc73efcf89"
   dependencies:
     arr-diff "^4.0.0"
     array-unique "^0.3.2"
-    braces "^2.3.0"
-    define-property "^1.0.0"
-    extend-shallow "^2.0.1"
-    extglob "^2.0.2"
+    braces "^2.3.1"
+    define-property "^2.0.2"
+    extend-shallow "^3.0.2"
+    extglob "^2.0.4"
     fragment-cache "^0.2.1"
-    kind-of "^6.0.0"
-    nanomatch "^1.2.5"
+    kind-of "^6.0.2"
+    nanomatch "^1.2.9"
     object.pick "^1.3.0"
     regex-not "^1.0.0"
     snapdragon "^0.8.1"
@@ -4869,19 +5560,19 @@ miller-rabin@^4.0.0:
     bn.js "^4.0.0"
     brorand "^1.0.1"
 
-mime-db@~1.30.0:
-  version "1.30.0"
-  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.30.0.tgz#74c643da2dd9d6a45399963465b26d5ca7d71f01"
+mime-db@~1.33.0:
+  version "1.33.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.33.0.tgz#a3492050a5cb9b63450541e39d9788d2272783db"
 
-mime-types@^2.1.12, mime-types@~2.1.7:
-  version "2.1.17"
-  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.17.tgz#09d7a393f03e995a79f8af857b70a9e0ab16557a"
+mime-types@^2.1.12, mime-types@~2.1.17, mime-types@~2.1.7:
+  version "2.1.18"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.18.tgz#6f323f60a83d11146f831ff11fd66e2fe5503bb8"
   dependencies:
-    mime-db "~1.30.0"
+    mime-db "~1.33.0"
 
 mimic-fn@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-1.1.0.tgz#e667783d92e89dbd342818b5230b9d62a672ad18"
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-1.2.0.tgz#820c86a39334640e99516928bd03fca88057d022"
 
 minimalistic-assert@^1.0.0:
   version "1.0.0"
@@ -4897,7 +5588,7 @@ minimatch@^2.0.1:
   dependencies:
     brace-expansion "^1.0.0"
 
-minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.4:
+minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.3, minimatch@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
   dependencies:
@@ -4910,6 +5601,13 @@ minimatch@~0.2.11:
     lru-cache "2"
     sigmund "~1.0.0"
 
+minimist-options@^3.0.1:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/minimist-options/-/minimist-options-3.0.2.tgz#fba4c8191339e13ecf4d61beb03f070103f3d954"
+  dependencies:
+    arrify "^1.0.1"
+    is-plain-obj "^1.1.0"
+
 minimist@0.0.8:
   version "0.0.8"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
@@ -4927,35 +5625,18 @@ minimist@~0.0.1:
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.10.tgz#de3f98543dbf96082be48ad1a0c7cda836301dcf"
 
 mixin-deep@^1.2.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/mixin-deep/-/mixin-deep-1.3.0.tgz#47a8732ba97799457c8c1eca28f95132d7e8150a"
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/mixin-deep/-/mixin-deep-1.3.1.tgz#a49e7268dce1a0d9698e45326c5626df3543d0fe"
   dependencies:
     for-in "^1.0.2"
     is-extendable "^1.0.1"
 
-mkdirp@0.5.1, "mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.0:
+"mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.0:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   dependencies:
     minimist "0.0.8"
 
-mocha@^3.0.0:
-  version "3.5.3"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-3.5.3.tgz#1e0480fe36d2da5858d1eb6acc38418b26eaa20d"
-  dependencies:
-    browser-stdout "1.3.0"
-    commander "2.9.0"
-    debug "2.6.8"
-    diff "3.2.0"
-    escape-string-regexp "1.0.5"
-    glob "7.1.1"
-    growl "1.9.2"
-    he "1.1.1"
-    json3 "3.3.2"
-    lodash.create "3.1.1"
-    mkdirp "0.5.1"
-    supports-color "3.1.2"
-
 modify-values@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/modify-values/-/modify-values-1.0.0.tgz#e2b6cdeb9ce19f99317a53722f3dbf5df5eaaab2"
@@ -4981,8 +5662,8 @@ module-deps@^4.0.8:
     xtend "^4.0.0"
 
 moment@^2.6.0:
-  version "2.20.1"
-  resolved "https://registry.yarnpkg.com/moment/-/moment-2.20.1.tgz#d6eb1a46cbcc14a2b2f9434112c1ff8907f313fd"
+  version "2.21.0"
+  resolved "https://registry.yarnpkg.com/moment/-/moment-2.21.0.tgz#2a114b51d2a6ec9e6d83cf803f838a878d8a023a"
 
 ms@2.0.0:
   version "2.0.0"
@@ -5008,20 +5689,21 @@ mute-stream@0.0.7:
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.7.tgz#3075ce93bc21b8fab43e1bc4da7e8115ed1e7bab"
 
 nan@^2.3.0:
-  version "2.8.0"
-  resolved "https://registry.yarnpkg.com/nan/-/nan-2.8.0.tgz#ed715f3fe9de02b57a5e6252d90a96675e1f085a"
+  version "2.9.2"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.9.2.tgz#f564d75f5f8f36a6d9456cca7a6c4fe488ab7866"
 
-nanomatch@^1.2.5:
-  version "1.2.7"
-  resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.7.tgz#53cd4aa109ff68b7f869591fdc9d10daeeea3e79"
+nanomatch@^1.2.9:
+  version "1.2.9"
+  resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.9.tgz#879f7150cb2dab7a471259066c104eee6e0fa7c2"
   dependencies:
     arr-diff "^4.0.0"
     array-unique "^0.3.2"
-    define-property "^1.0.0"
-    extend-shallow "^2.0.1"
+    define-property "^2.0.2"
+    extend-shallow "^3.0.2"
     fragment-cache "^0.2.1"
-    is-odd "^1.0.0"
-    kind-of "^5.0.2"
+    is-odd "^2.0.0"
+    is-windows "^1.0.2"
+    kind-of "^6.0.2"
     object.pick "^1.3.0"
     regex-not "^1.0.0"
     snapdragon "^0.8.1"
@@ -5041,6 +5723,10 @@ ncname@1.0.x:
   dependencies:
     xml-char-classes "^1.0.0"
 
+neo-async@^2.5.0:
+  version "2.5.0"
+  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.5.0.tgz#76b1c823130cca26acfbaccc8fbaf0a2fa33b18f"
+
 no-case@^2.2.0:
   version "2.3.2"
   resolved "https://registry.yarnpkg.com/no-case/-/no-case-2.3.2.tgz#60b813396be39b3f1288a4c1ed5d1e7d28b464ac"
@@ -5054,6 +5740,10 @@ node-fetch@^1.7.0:
     encoding "^0.1.11"
     is-stream "^1.0.1"
 
+node-int64@^0.4.0:
+  version "0.4.0"
+  resolved "https://registry.yarnpkg.com/node-int64/-/node-int64-0.4.0.tgz#87a9065cdb355d3182d8f94ce11188b825c68a3b"
+
 node-libs-browser@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/node-libs-browser/-/node-libs-browser-2.1.0.tgz#5f94263d404f6e44767d726901fff05478d600df"
@@ -5086,6 +5776,15 @@ node-modules-regexp@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/node-modules-regexp/-/node-modules-regexp-1.0.0.tgz#8d9dbe28964a4ac5712e9131642107c71e90ec40"
 
+node-notifier@^5.2.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/node-notifier/-/node-notifier-5.2.1.tgz#fa313dd08f5517db0e2502e5758d664ac69f9dea"
+  dependencies:
+    growly "^1.3.0"
+    semver "^5.4.1"
+    shellwords "^0.1.1"
+    which "^1.3.0"
+
 node-pre-gyp@^0.6.39:
   version "0.6.39"
   resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.6.39.tgz#c00e96860b23c0e1420ac7befc5044e1d78d8649"
@@ -5122,7 +5821,7 @@ normalize-path@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-1.0.0.tgz#32d0e472f91ff345701c15a8311018d3b0a90379"
 
-normalize-path@^2.0.0, normalize-path@^2.0.1:
+normalize-path@^2.0.0, normalize-path@^2.0.1, normalize-path@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-2.1.1.tgz#1ab28b556e198363a8c1a6f7e6fa20137fe6aed9"
   dependencies:
@@ -5167,39 +5866,11 @@ number-is-nan@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/number-is-nan/-/number-is-nan-1.0.1.tgz#097b602b53422a522c1afb8790318336941a011d"
 
-nyc@^11.0.3:
-  version "11.4.1"
-  resolved "https://registry.yarnpkg.com/nyc/-/nyc-11.4.1.tgz#13fdf7e7ef22d027c61d174758f6978a68f4f5e5"
-  dependencies:
-    archy "^1.0.0"
-    arrify "^1.0.1"
-    caching-transform "^1.0.0"
-    convert-source-map "^1.3.0"
-    debug-log "^1.0.1"
-    default-require-extensions "^1.0.0"
-    find-cache-dir "^0.1.1"
-    find-up "^2.1.0"
-    foreground-child "^1.5.3"
-    glob "^7.0.6"
-    istanbul-lib-coverage "^1.1.1"
-    istanbul-lib-hook "^1.1.0"
-    istanbul-lib-instrument "^1.9.1"
-    istanbul-lib-report "^1.1.2"
-    istanbul-lib-source-maps "^1.2.2"
-    istanbul-reports "^1.1.3"
-    md5-hex "^1.2.0"
-    merge-source-map "^1.0.2"
-    micromatch "^2.3.11"
-    mkdirp "^0.5.0"
-    resolve-from "^2.0.0"
-    rimraf "^2.5.4"
-    signal-exit "^3.0.1"
-    spawn-wrap "^1.4.2"
-    test-exclude "^4.1.1"
-    yargs "^10.0.3"
-    yargs-parser "^8.0.0"
+nwmatcher@^1.4.3:
+  version "1.4.3"
+  resolved "https://registry.yarnpkg.com/nwmatcher/-/nwmatcher-1.4.3.tgz#64348e3b3d80f035b40ac11563d278f8b72db89c"
 
-oauth-sign@~0.8.1:
+oauth-sign@~0.8.1, oauth-sign@~0.8.2:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.8.2.tgz#46a6ab7f0aead8deae9ec0565780b7d4efeb9d43"
 
@@ -5294,7 +5965,7 @@ optimist@^0.6.1:
     minimist "~0.0.1"
     wordwrap "~0.0.2"
 
-optionator@^0.8.2:
+optionator@^0.8.1, optionator@^0.8.2:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.2.tgz#364c5e409d3f4d6301d6c0b4c05bba50180aeb64"
   dependencies:
@@ -5334,7 +6005,7 @@ os-browserify@~0.1.1:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/os-browserify/-/os-browserify-0.1.2.tgz#49ca0293e0b19590a5f5de10c7f265a617d8fe54"
 
-os-homedir@^1.0.0, os-homedir@^1.0.1:
+os-homedir@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
 
@@ -5352,20 +6023,20 @@ os-locale@^2.0.0:
     lcid "^1.0.0"
     mem "^1.1.0"
 
-os-tmpdir@^1.0.0, os-tmpdir@~1.0.2:
+os-tmpdir@^1.0.0, os-tmpdir@^1.0.1, os-tmpdir@~1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-tmpdir/-/os-tmpdir-1.0.2.tgz#bbe67406c79aa85c5cfec766fe5734555dfa1274"
 
 osenv@^0.1.4:
-  version "0.1.4"
-  resolved "https://registry.yarnpkg.com/osenv/-/osenv-0.1.4.tgz#42fe6d5953df06c8064be6f176c3d05aaaa34644"
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/osenv/-/osenv-0.1.5.tgz#85cdfafaeb28e8677f416e287592b5f3f49ea410"
   dependencies:
     os-homedir "^1.0.0"
     os-tmpdir "^1.0.0"
 
 output-file-sync@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/output-file-sync/-/output-file-sync-2.0.0.tgz#5d348a1a1eaed1ad168648a01a2d6d13078ce987"
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/output-file-sync/-/output-file-sync-2.0.1.tgz#f53118282f5f553c2799541792b723a4c71430c0"
   dependencies:
     graceful-fs "^4.1.11"
     is-plain-obj "^1.1.0"
@@ -5463,6 +6134,10 @@ parse-passwd@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/parse-passwd/-/parse-passwd-1.0.0.tgz#6d5b934a456993b23d37f40a382d6f1666a8e5c6"
 
+parse5@4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/parse5/-/parse5-4.0.0.tgz#6d78656e3da8d78b4ec0b906f7c08ef1dfe3f608"
+
 parse5@^3.0.1:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/parse5/-/parse5-3.0.3.tgz#042f792ffdd36851551cf4e9e066b3874ab45b5c"
@@ -5535,6 +6210,12 @@ path-type@^2.0.0:
   dependencies:
     pify "^2.0.0"
 
+path-type@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/path-type/-/path-type-3.0.0.tgz#cef31dc8e0a1a3bb0d105c0cd97cf3bf47f4e36f"
+  dependencies:
+    pify "^3.0.0"
+
 pathval@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/pathval/-/pathval-1.1.0.tgz#b942e6d4bde653005ef6b71361def8727d0645e0"
@@ -5553,6 +6234,10 @@ performance-now@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-0.2.0.tgz#33ef30c5c77d4ea21c5a53869d91b56d8f2555e5"
 
+performance-now@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-2.1.0.tgz#6309f4e0e5fa913ec1c69307ae364b4b377c9e7b"
+
 pify@^2.0.0, pify@^2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
@@ -5577,12 +6262,6 @@ pirates@^3.0.1:
   dependencies:
     node-modules-regexp "^1.0.0"
 
-pkg-dir@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-1.0.0.tgz#7a4b508a8d5bb2d629d447056ff4e9c9314cf3d4"
-  dependencies:
-    find-up "^1.0.0"
-
 pkg-dir@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-2.0.0.tgz#f6d5d1109e19d63edf428e0bd57e12777615334b"
@@ -5599,10 +6278,23 @@ plugin-error@^0.1.2:
     arr-union "^2.0.1"
     extend-shallow "^1.1.2"
 
+plugin-error@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/plugin-error/-/plugin-error-1.0.1.tgz#77016bd8919d0ac377fdcdd0322328953ca5781c"
+  dependencies:
+    ansi-colors "^1.0.1"
+    arr-diff "^4.0.0"
+    arr-union "^3.1.0"
+    extend-shallow "^3.0.2"
+
 pluralize@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-7.0.0.tgz#298b89df8b93b0221dbf421ad2b1b1ea23fc6777"
 
+pn@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/pn/-/pn-1.1.0.tgz#e2f4cef0e219f463c179ab37463e4e1ecdccbafb"
+
 posix-character-classes@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
@@ -5615,9 +6307,9 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-prettier@1.10.2:
-  version "1.10.2"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.10.2.tgz#1af8356d1842276a99a5b5529c82dd9e9ad3cc93"
+prettier@1.11.1:
+  version "1.11.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.11.1.tgz#61e43fc4cd44e68f2b0dfc2c38cd4bb0fccdcc75"
 
 pretty-format@^21.2.1:
   version "21.2.1"
@@ -5626,11 +6318,18 @@ pretty-format@^21.2.1:
     ansi-regex "^3.0.0"
     ansi-styles "^3.2.0"
 
+pretty-format@^22.4.0:
+  version "22.4.0"
+  resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-22.4.0.tgz#237b1f7e1c50ed03bc65c03ccc29d7c8bb7beb94"
+  dependencies:
+    ansi-regex "^3.0.0"
+    ansi-styles "^3.2.0"
+
 pretty-hrtime@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/pretty-hrtime/-/pretty-hrtime-1.0.3.tgz#b7e3ea42435a4c9b2759d99e0f201eb195802ee1"
 
-private@^0.1.6, private@~0.1.5:
+private@^0.1.6, private@^0.1.7, private@~0.1.5:
   version "0.1.8"
   resolved "https://registry.yarnpkg.com/private/-/private-0.1.8.tgz#2381edb3689f7a53d653190060fcf822d2f368ff"
 
@@ -5638,6 +6337,10 @@ process-nextick-args@^1.0.6, process-nextick-args@~1.0.6:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-1.0.7.tgz#150e20b756590ad3f91093f25a4f2ad8bff30ba3"
 
+process-nextick-args@~2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.0.tgz#a37d732f4271b4ab1ad070d35508e8290788ffaa"
+
 process@^0.11.10, process@~0.11.0:
   version "0.11.10"
   resolved "https://registry.yarnpkg.com/process/-/process-0.11.10.tgz#7332300e840161bda3e69a1d1d91a7d4bc16f182"
@@ -5683,7 +6386,11 @@ punycode@^1.2.4, punycode@^1.3.2, punycode@^1.4.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.4.1.tgz#c0d5a63b2718800ad8e1eb0fa5269c84dd41845e"
 
-q@^1.4.1:
+punycode@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/punycode/-/punycode-2.1.0.tgz#5f863edc89b96db09074bad7947bf09056ca4e7d"
+
+q@^1.4.1, q@^1.5.1:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/q/-/q-1.5.1.tgz#7e32f75b41381291d04611f1bf14109ac00651d7"
 
@@ -5691,6 +6398,10 @@ qs@~6.4.0:
   version "6.4.0"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.4.0.tgz#13e26d28ad6b0ffaa91312cd3bf708ed351e7233"
 
+qs@~6.5.1:
+  version "6.5.1"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.5.1.tgz#349cdf6eef89ec45c12d7d5eb3fc0c870343a6d8"
+
 querystring-es3@^0.2.0, querystring-es3@~0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/querystring-es3/-/querystring-es3-0.2.1.tgz#9ec61f79049875707d69414596fd907a4d711e73"
@@ -5699,6 +6410,10 @@ querystring@0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/querystring/-/querystring-0.2.0.tgz#b209849203bb25df820da756e747005878521620"
 
+quick-lru@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/quick-lru/-/quick-lru-1.1.0.tgz#4360b17c61136ad38078397ff11416e186dcfbb8"
+
 randomatic@^1.1.3:
   version "1.1.7"
   resolved "https://registry.yarnpkg.com/randomatic/-/randomatic-1.1.7.tgz#c7abe9cc8b87c0baa876b19fde83fd464797e38c"
@@ -5713,15 +6428,15 @@ randombytes@^2.0.0, randombytes@^2.0.1, randombytes@^2.0.5:
     safe-buffer "^5.1.0"
 
 randomfill@^1.0.3:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/randomfill/-/randomfill-1.0.3.tgz#b96b7df587f01dd91726c418f30553b1418e3d62"
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/randomfill/-/randomfill-1.0.4.tgz#c92196fc86ab42be983f1bf31778224931d61458"
   dependencies:
     randombytes "^2.0.5"
     safe-buffer "^5.1.0"
 
 rc@^1.1.7:
-  version "1.2.4"
-  resolved "https://registry.yarnpkg.com/rc/-/rc-1.2.4.tgz#a0f606caae2a3b862bbd0ef85482c0125b315fa3"
+  version "1.2.5"
+  resolved "https://registry.yarnpkg.com/rc/-/rc-1.2.5.tgz#275cd687f6e3b36cc756baa26dfee80a790301fd"
   dependencies:
     deep-extend "~0.4.0"
     ini "~1.3.0"
@@ -5754,6 +6469,13 @@ read-pkg-up@^2.0.0:
     find-up "^2.0.0"
     read-pkg "^2.0.0"
 
+read-pkg-up@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/read-pkg-up/-/read-pkg-up-3.0.0.tgz#3ed496685dba0f8fe118d0691dc51f4a1ff96f07"
+  dependencies:
+    find-up "^2.0.0"
+    read-pkg "^3.0.0"
+
 read-pkg@^1.0.0, read-pkg@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/read-pkg/-/read-pkg-1.1.0.tgz#f5ffaa5ecd29cb31c0474bca7d756b6bb29e3f28"
@@ -5770,6 +6492,14 @@ read-pkg@^2.0.0:
     normalize-package-data "^2.3.2"
     path-type "^2.0.0"
 
+read-pkg@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/read-pkg/-/read-pkg-3.0.0.tgz#9cbc686978fee65d16c00e2b19c237fcf6e38389"
+  dependencies:
+    load-json-file "^4.0.0"
+    normalize-package-data "^2.3.2"
+    path-type "^3.0.0"
+
 "readable-stream@>=1.0.33-1 <1.1.0-0":
   version "1.0.34"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.0.34.tgz#125820e34bc842d2f2aaafafe4c2916ee32c157c"
@@ -5789,13 +6519,13 @@ read-pkg@^2.0.0:
     string_decoder "~0.10.x"
 
 readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.4, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.3.3:
-  version "2.3.3"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.3.tgz#368f2512d79f9d46fdfc71349ae7878bbc1eb95c"
+  version "2.3.5"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.5.tgz#b4f85003a938cbb6ecbce2a124fb1012bd1a838d"
   dependencies:
     core-util-is "~1.0.0"
     inherits "~2.0.3"
     isarray "~1.0.0"
-    process-nextick-args "~1.0.6"
+    process-nextick-args "~2.0.0"
     safe-buffer "~5.1.1"
     string_decoder "~1.0.3"
     util-deprecate "~1.0.1"
@@ -5820,6 +6550,12 @@ readdirp@^2.0.0:
     readable-stream "^2.0.2"
     set-immediate-shim "^1.0.1"
 
+realpath-native@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/realpath-native/-/realpath-native-1.0.0.tgz#7885721a83b43bd5327609f0ddecb2482305fdf0"
+  dependencies:
+    util.promisify "^1.0.0"
+
 recast@~0.11.12:
   version "0.11.23"
   resolved "https://registry.yarnpkg.com/recast/-/recast-0.11.23.tgz#451fd3004ab1e4df9b4e4b66376b2a21912462d3"
@@ -5842,6 +6578,13 @@ redent@^1.0.0:
     indent-string "^2.1.0"
     strip-indent "^1.0.1"
 
+redent@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/redent/-/redent-2.0.0.tgz#c1b2007b42d57eb1389079b3c8333639d5e1ccaa"
+  dependencies:
+    indent-string "^3.0.0"
+    strip-indent "^2.0.0"
+
 regenerate-unicode-properties@^5.1.1:
   version "5.1.3"
   resolved "https://registry.yarnpkg.com/regenerate-unicode-properties/-/regenerate-unicode-properties-5.1.3.tgz#54f5891543468f36f2274b67c6bc4c033c27b308"
@@ -5868,11 +6611,12 @@ regex-cache@^0.4.2:
   dependencies:
     is-equal-shallow "^0.1.3"
 
-regex-not@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/regex-not/-/regex-not-1.0.0.tgz#42f83e39771622df826b02af176525d6a5f157f9"
+regex-not@^1.0.0, regex-not@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/regex-not/-/regex-not-1.0.2.tgz#1f4ece27e00b0b65e0247a6810e6a85d83a5752c"
   dependencies:
-    extend-shallow "^2.0.1"
+    extend-shallow "^3.0.2"
+    safe-regex "^1.1.0"
 
 regexpu-core@^4.1.3:
   version "4.1.3"
@@ -5925,6 +6669,20 @@ replace-ext@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/replace-ext/-/replace-ext-1.0.0.tgz#de63128373fcbf7c3ccfa4de5a480c45a67958eb"
 
+request-promise-core@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/request-promise-core/-/request-promise-core-1.1.1.tgz#3eee00b2c5aa83239cfb04c5700da36f81cd08b6"
+  dependencies:
+    lodash "^4.13.1"
+
+request-promise-native@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/request-promise-native/-/request-promise-native-1.0.5.tgz#5281770f68e0c9719e5163fd3fab482215f4fda5"
+  dependencies:
+    request-promise-core "1.1.1"
+    stealthy-require "^1.1.0"
+    tough-cookie ">=2.3.3"
+
 request@2.81.0:
   version "2.81.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.81.0.tgz#c6928946a0e06c5f8d6f8a9333469ffda46298a0"
@@ -5952,6 +6710,33 @@ request@2.81.0:
     tunnel-agent "^0.6.0"
     uuid "^3.0.0"
 
+request@^2.83.0:
+  version "2.83.0"
+  resolved "https://registry.yarnpkg.com/request/-/request-2.83.0.tgz#ca0b65da02ed62935887808e6f510381034e3356"
+  dependencies:
+    aws-sign2 "~0.7.0"
+    aws4 "^1.6.0"
+    caseless "~0.12.0"
+    combined-stream "~1.0.5"
+    extend "~3.0.1"
+    forever-agent "~0.6.1"
+    form-data "~2.3.1"
+    har-validator "~5.0.3"
+    hawk "~6.0.2"
+    http-signature "~1.2.0"
+    is-typedarray "~1.0.0"
+    isstream "~0.1.2"
+    json-stringify-safe "~5.0.1"
+    mime-types "~2.1.17"
+    oauth-sign "~0.8.2"
+    performance-now "^2.1.0"
+    qs "~6.5.1"
+    safe-buffer "^5.1.1"
+    stringstream "~0.0.5"
+    tough-cookie "~2.3.3"
+    tunnel-agent "^0.6.0"
+    uuid "^3.1.0"
+
 require-directory@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/require-directory/-/require-directory-2.1.1.tgz#8c64ad5fd30dab1c976e2344ffe7f792a6a6df42"
@@ -5971,6 +6756,12 @@ require-uncached@^1.0.3:
     caller-path "^0.1.0"
     resolve-from "^1.0.0"
 
+resolve-cwd@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/resolve-cwd/-/resolve-cwd-2.0.0.tgz#00a9f7387556e27038eae232caa372a6a59b665a"
+  dependencies:
+    resolve-from "^3.0.0"
+
 resolve-dir@^1.0.0, resolve-dir@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/resolve-dir/-/resolve-dir-1.0.1.tgz#79a40644c362be82f26effe739c9bb5382046f43"
@@ -5982,9 +6773,9 @@ resolve-from@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-1.0.1.tgz#26cbfe935d1aeeeabb29bc3fe5aeb01e93d44226"
 
-resolve-from@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-2.0.0.tgz#9480ab20e94ffa1d9e80a804c7ea147611966b57"
+resolve-from@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-3.0.0.tgz#b22c7af7d9d6881bc8b6e653335eebcb0a188748"
 
 resolve-url@^0.2.1:
   version "0.2.1"
@@ -6014,13 +6805,17 @@ restore-cursor@^2.0.0:
     onetime "^2.0.0"
     signal-exit "^3.0.2"
 
+ret@~0.1.10:
+  version "0.1.15"
+  resolved "https://registry.yarnpkg.com/ret/-/ret-0.1.15.tgz#b8a4825d5bdb1fc3f6f53c2bc33f81388681c7bc"
+
 right-align@^0.1.1:
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/right-align/-/right-align-0.1.3.tgz#61339b722fe6a3515689210d24e14c96148613ef"
   dependencies:
     align-text "^0.1.1"
 
-rimraf@2, rimraf@^2.2.8, rimraf@^2.4.3, rimraf@^2.5.1, rimraf@^2.5.4, rimraf@^2.6.1, rimraf@^2.6.2:
+rimraf@2, rimraf@^2.2.8, rimraf@^2.4.3, rimraf@^2.5.1, rimraf@^2.5.4, rimraf@^2.6.1:
   version "2.6.2"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.2.tgz#2ed8150d24a16ea8651e6d6ef0f47c4158ce7a36"
   dependencies:
@@ -6034,25 +6829,26 @@ ripemd160@^2.0.0, ripemd160@^2.0.1:
     inherits "^2.0.1"
 
 rollup-plugin-babel@^4.0.0-beta.0:
-  version "4.0.0-beta.0"
-  resolved "https://registry.yarnpkg.com/rollup-plugin-babel/-/rollup-plugin-babel-4.0.0-beta.0.tgz#2fccbc30bf620bfac0cf870324248e30ba824ded"
+  version "4.0.0-beta.2"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-babel/-/rollup-plugin-babel-4.0.0-beta.2.tgz#abc05af4644aa52180e3fa2452f909b39b4ef145"
   dependencies:
-    rollup-pluginutils "^1.5.0"
+    "@babel/helper-module-imports" "7.0.0-beta.35"
+    rollup-pluginutils "^2.0.1"
 
 rollup-plugin-node-resolve@^3.0.2:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/rollup-plugin-node-resolve/-/rollup-plugin-node-resolve-3.0.2.tgz#38babc12fd404cc2ba1ff68648fe43fa3ffee6b0"
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-node-resolve/-/rollup-plugin-node-resolve-3.0.3.tgz#8f57b253edd00e5b0ad0aed7b7e9cf5982e98fa4"
   dependencies:
     builtin-modules "^1.1.0"
     is-module "^1.0.0"
     resolve "^1.1.6"
 
-rollup-pluginutils@^1.5.0:
-  version "1.5.2"
-  resolved "https://registry.yarnpkg.com/rollup-pluginutils/-/rollup-pluginutils-1.5.2.tgz#1e156e778f94b7255bfa1b3d0178be8f5c552408"
+rollup-pluginutils@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/rollup-pluginutils/-/rollup-pluginutils-2.0.1.tgz#7ec95b3573f6543a46a6461bd9a7c544525d0fc0"
   dependencies:
-    estree-walker "^0.2.1"
-    minimatch "^3.0.2"
+    estree-walker "^0.3.0"
+    micromatch "^2.3.11"
 
 rollup-stream@^1.24.1:
   version "1.24.1"
@@ -6090,7 +6886,31 @@ safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.1, safe-buffer@~5.1.0,
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"
 
-"semver@2 || 3 || 4 || 5", semver@^5.0.0, semver@^5.0.1, semver@^5.1.0, semver@^5.3.0:
+safe-regex@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/safe-regex/-/safe-regex-1.1.0.tgz#40a3669f3b077d1e943d44629e157dd48023bf2e"
+  dependencies:
+    ret "~0.1.10"
+
+sane@^2.0.0:
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/sane/-/sane-2.4.1.tgz#29f991208cf28636720efdc584293e7fd66663a5"
+  dependencies:
+    anymatch "^1.3.0"
+    exec-sh "^0.2.0"
+    fb-watchman "^2.0.0"
+    minimatch "^3.0.2"
+    minimist "^1.1.1"
+    walker "~1.0.5"
+    watch "~0.18.0"
+  optionalDependencies:
+    fsevents "^1.1.1"
+
+sax@^1.2.4:
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
+
+"semver@2 || 3 || 4 || 5", semver@^5.1.0, semver@^5.3.0, semver@^5.4.1, semver@^5.5.0:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.5.0.tgz#dc4bbc7a6ca9d916dee5d43516f0092b58f7b8ab"
 
@@ -6171,11 +6991,15 @@ shell-quote@^1.6.1:
     array-reduce "~0.0.0"
     jsonify "~0.0.0"
 
+shellwords@^0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/shellwords/-/shellwords-0.1.1.tgz#d6b9181c1a48d397324c84871efbcfc73fc0654b"
+
 sigmund@~1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/sigmund/-/sigmund-1.0.1.tgz#3ff21f198cad2175f9f3b781853fd94d0d19b590"
 
-signal-exit@^3.0.0, signal-exit@^3.0.1, signal-exit@^3.0.2:
+signal-exit@^3.0.0, signal-exit@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
 
@@ -6193,10 +7017,6 @@ slice-ansi@1.0.0:
   dependencies:
     is-fullwidth-code-point "^2.0.0"
 
-slide@^1.1.5:
-  version "1.1.6"
-  resolved "https://registry.yarnpkg.com/slide/-/slide-1.1.6.tgz#56eb027d65b4d2dce6cb2e2d32c4d4afc9e1d707"
-
 snapdragon-node@^2.0.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/snapdragon-node/-/snapdragon-node-2.1.1.tgz#6c175f86ff14bdb0724563e8f3c1b021a286853b"
@@ -6230,6 +7050,12 @@ sntp@1.x.x:
   dependencies:
     hoek "2.x.x"
 
+sntp@2.x.x:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/sntp/-/sntp-2.1.0.tgz#2c6cec14fedc2222739caf9b5c3d85d1cc5a2cc8"
+  dependencies:
+    hoek "4.x.x"
+
 sort-keys@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/sort-keys/-/sort-keys-2.0.0.tgz#658535584861ec97d730d6cf41822e1f56684128"
@@ -6250,17 +7076,23 @@ source-map-resolve@^0.5.0:
     source-map-url "^0.4.0"
     urix "^0.1.0"
 
-source-map-support@^0.4.2:
+source-map-support@^0.4.15, source-map-support@^0.4.2:
   version "0.4.18"
   resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.4.18.tgz#0286a6de8be42641338594e97ccea75f0a2c585f"
   dependencies:
     source-map "^0.5.6"
 
+source-map-support@^0.5.0:
+  version "0.5.3"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.3.tgz#2b3d5fff298cfa4d1afd7d4352d569e9a0158e76"
+  dependencies:
+    source-map "^0.6.0"
+
 source-map-url@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.4.0.tgz#3e935d7ddd73631b97659956d55128e87b5084a3"
 
-source-map@0.5.x, source-map@^0.5.0, source-map@^0.5.1, source-map@^0.5.3, source-map@^0.5.6, source-map@~0.5.0, source-map@~0.5.1, source-map@~0.5.3:
+source-map@0.5.x, source-map@^0.5.0, source-map@^0.5.1, source-map@^0.5.3, source-map@^0.5.6, source-map@^0.5.7, source-map@~0.5.0, source-map@~0.5.1, source-map@~0.5.3:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
 
@@ -6270,7 +7102,7 @@ source-map@^0.4.4, source-map@~0.4.0, source-map@~0.4.2:
   dependencies:
     amdefine ">=0.0.4"
 
-source-map@^0.6.1, source-map@~0.6.1:
+source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
 
@@ -6278,30 +7110,27 @@ sparkles@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/sparkles/-/sparkles-1.0.0.tgz#1acbbfb592436d10bbe8f785b7cc6f82815012c3"
 
-spawn-wrap@^1.4.2:
-  version "1.4.2"
-  resolved "https://registry.yarnpkg.com/spawn-wrap/-/spawn-wrap-1.4.2.tgz#cff58e73a8224617b6561abdc32586ea0c82248c"
+spdx-correct@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.0.0.tgz#05a5b4d7153a195bc92c3c425b69f3b2a9524c82"
   dependencies:
-    foreground-child "^1.5.6"
-    mkdirp "^0.5.0"
-    os-homedir "^1.0.1"
-    rimraf "^2.6.2"
-    signal-exit "^3.0.2"
-    which "^1.3.0"
+    spdx-expression-parse "^3.0.0"
+    spdx-license-ids "^3.0.0"
 
-spdx-correct@~1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-1.0.2.tgz#4b3073d933ff51f3912f03ac5519498a4150db40"
-  dependencies:
-    spdx-license-ids "^1.0.2"
+spdx-exceptions@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/spdx-exceptions/-/spdx-exceptions-2.1.0.tgz#2c7ae61056c714a5b9b9b2b2af7d311ef5c78fe9"
 
-spdx-expression-parse@~1.0.0:
-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/spdx-expression-parse/-/spdx-expression-parse-1.0.4.tgz#9bdf2f20e1f40ed447fbe273266191fced51626c"
+spdx-expression-parse@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/spdx-expression-parse/-/spdx-expression-parse-3.0.0.tgz#99e119b7a5da00e05491c9fa338b7904823b41d0"
+  dependencies:
+    spdx-exceptions "^2.1.0"
+    spdx-license-ids "^3.0.0"
 
-spdx-license-ids@^1.0.2:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/spdx-license-ids/-/spdx-license-ids-1.2.2.tgz#c9df7a3424594ade6bd11900d596696dc06bac57"
+spdx-license-ids@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/spdx-license-ids/-/spdx-license-ids-3.0.0.tgz#7a7cd28470cc6d3a1cfe6d66886f6bc430d3ac87"
 
 split-string@^3.0.1, split-string@^3.0.2:
   version "3.1.0"
@@ -6339,9 +7168,13 @@ sshpk@^1.7.0:
     jsbn "~0.1.0"
     tweetnacl "~0.14.0"
 
-staged-git-files@0.0.4:
-  version "0.0.4"
-  resolved "https://registry.yarnpkg.com/staged-git-files/-/staged-git-files-0.0.4.tgz#d797e1b551ca7a639dec0237dc6eb4bb9be17d35"
+stack-utils@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/stack-utils/-/stack-utils-1.0.1.tgz#d4f33ab54e8e38778b0ca5cfd3b3afb12db68620"
+
+staged-git-files@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/staged-git-files/-/staged-git-files-1.0.0.tgz#cdb847837c1fcc52c08a872d4883cc0877668a80"
 
 static-extend@^0.1.1:
   version "0.1.2"
@@ -6350,6 +7183,10 @@ static-extend@^0.1.1:
     define-property "^0.2.5"
     object-copy "^0.1.0"
 
+stealthy-require@^1.1.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/stealthy-require/-/stealthy-require-1.1.1.tgz#35b09875b4ff49f26a777e509b3090a3226bf24b"
+
 stream-browserify@^2.0.0, stream-browserify@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/stream-browserify/-/stream-browserify-2.0.1.tgz#66266ee5f9bdb9940a4e4514cafb43bb71e5c9db"
@@ -6365,8 +7202,8 @@ stream-combiner2@^1.1.1:
     readable-stream "^2.0.2"
 
 stream-consume@~0.1.0:
-  version "0.1.0"
-  resolved "https://registry.yarnpkg.com/stream-consume/-/stream-consume-0.1.0.tgz#a41ead1a6d6081ceb79f65b061901b6d8f3d1d0f"
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/stream-consume/-/stream-consume-0.1.1.tgz#d3bdb598c2bd0ae82b8cac7ac50b1107a7996c48"
 
 stream-http@^2.0.0, stream-http@^2.7.2:
   version "2.8.0"
@@ -6397,6 +7234,13 @@ streamfilter@^1.0.5:
   dependencies:
     readable-stream "^2.0.2"
 
+string-length@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/string-length/-/string-length-2.0.0.tgz#d40dbb686a3ace960c1cffca562bf2c45f8363ed"
+  dependencies:
+    astral-regex "^1.0.0"
+    strip-ansi "^4.0.0"
+
 string-width@^1.0.1, string-width@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-1.0.2.tgz#118bdf5b8cdc51a2a7e70d211e07e2b0b9b107d3"
@@ -6431,14 +7275,14 @@ string_decoder@~0.10.0, string_decoder@~0.10.x:
   resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
 
 stringify-object@^3.2.0:
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/stringify-object/-/stringify-object-3.2.1.tgz#2720c2eff940854c819f6ee252aaeb581f30624d"
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/stringify-object/-/stringify-object-3.2.2.tgz#9853052e5a88fb605a44cd27445aa257ad7ffbcd"
   dependencies:
     get-own-enumerable-property-symbols "^2.0.1"
     is-obj "^1.0.1"
     is-regexp "^1.0.0"
 
-stringstream@~0.0.4:
+stringstream@~0.0.4, stringstream@~0.0.5:
   version "0.0.5"
   resolved "https://registry.yarnpkg.com/stringstream/-/stringstream-0.0.5.tgz#4e484cd4de5a0bbbee18e46307710a8a81621878"
 
@@ -6461,6 +7305,10 @@ strip-bom-stream@^2.0.0:
     first-chunk-stream "^2.0.0"
     strip-bom "^2.0.0"
 
+strip-bom@3.0.0, strip-bom@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/strip-bom/-/strip-bom-3.0.0.tgz#2334c18e9c759f7bdd56fdef7e9ae3d588e68ed3"
+
 strip-bom@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/strip-bom/-/strip-bom-1.0.0.tgz#85b8862f3844b5a6d5ec8467a93598173a36f794"
@@ -6474,10 +7322,6 @@ strip-bom@^2.0.0:
   dependencies:
     is-utf8 "^0.2.0"
 
-strip-bom@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/strip-bom/-/strip-bom-3.0.0.tgz#2334c18e9c759f7bdd56fdef7e9ae3d588e68ed3"
-
 strip-eof@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/strip-eof/-/strip-eof-1.0.0.tgz#bb43ff5598a6eb05d89b59fcd129c983313606bf"
@@ -6512,12 +7356,6 @@ subarg@^1.0.0:
   dependencies:
     minimist "^1.1.0"
 
-supports-color@3.1.2:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-3.1.2.tgz#72a262894d9d408b956ca05ff37b2ed8a6e2a2d5"
-  dependencies:
-    has-flag "^1.0.0"
-
 supports-color@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
@@ -6528,12 +7366,18 @@ supports-color@^3.1.2:
   dependencies:
     has-flag "^1.0.0"
 
-supports-color@^4.0.0, supports-color@^4.2.1:
+supports-color@^4.2.1:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-4.5.0.tgz#be7a0de484dec5c5cddf8b3d59125044912f635b"
   dependencies:
     has-flag "^2.0.0"
 
+supports-color@^5.2.0, supports-color@^5.3.0:
+  version "5.3.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.3.0.tgz#5b24ac15db80fa927cf5227a4a33fd3c4c7676c0"
+  dependencies:
+    has-flag "^3.0.0"
+
 symbol-observable@1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/symbol-observable/-/symbol-observable-1.0.1.tgz#8340fc4702c3122df5d22288f88283f513d3fdd4"
@@ -6542,13 +7386,17 @@ symbol-observable@^0.2.2:
   version "0.2.4"
   resolved "https://registry.yarnpkg.com/symbol-observable/-/symbol-observable-0.2.4.tgz#95a83db26186d6af7e7a18dbd9760a2f86d08f40"
 
+symbol-tree@^3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.2.tgz#ae27db38f660a7ae2e1c3b7d1bc290819b8519e6"
+
 syntax-error@^1.1.1:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/syntax-error/-/syntax-error-1.3.0.tgz#1ed9266c4d40be75dc55bf9bb1cb77062bb96ca1"
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/syntax-error/-/syntax-error-1.4.0.tgz#2d9d4ff5c064acb711594a3e3b95054ad51d907c"
   dependencies:
-    acorn "^4.0.3"
+    acorn-node "^1.2.0"
 
-table@^4.0.1:
+table@4.0.2:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/table/-/table-4.0.2.tgz#a33447375391e766ad34d3486e6e2aedc84d2e36"
   dependencies:
@@ -6607,8 +7455,8 @@ tempfile@^1.1.1:
     uuid "^2.0.1"
 
 test-exclude@^4.1.1:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-4.1.1.tgz#4d84964b0966b0087ecc334a2ce002d3d9341e26"
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-4.2.0.tgz#07e3613609a362c74516a717515e13322ab45b3c"
   dependencies:
     arrify "^1.0.1"
     micromatch "^2.3.11"
@@ -6616,6 +7464,20 @@ test-exclude@^4.1.1:
     read-pkg-up "^1.0.1"
     require-main-filename "^1.0.1"
 
+test262-parser@^2.0.7:
+  version "2.0.7"
+  resolved "https://registry.yarnpkg.com/test262-parser/-/test262-parser-2.0.7.tgz#733b46bf7759e747eae34b5b14d6a3c8d2082add"
+  dependencies:
+    js-yaml "^3.2.1"
+    through "^2.3.4"
+
+test262-stream@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/test262-stream/-/test262-stream-1.1.0.tgz#18265217b8ca800d9ec432e37e6b8d192e12c6fd"
+  dependencies:
+    klaw "^2.1.0"
+    test262-parser "^2.0.7"
+
 text-extensions@^1.0.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/text-extensions/-/text-extensions-1.7.0.tgz#faaaba2625ed746d568a23e4d0aacd9bf08a8b39"
@@ -6624,6 +7486,10 @@ text-table@~0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
 
+throat@^4.0.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/throat/-/throat-4.1.0.tgz#89037cbc92c56ab18926e6ba4cbb200e15672a6a"
+
 through2@^0.6.1:
   version "0.6.5"
   resolved "https://registry.yarnpkg.com/through2/-/through2-0.6.5.tgz#41ab9c67b29d57209071410e1d7a7a968cd3ad48"
@@ -6666,8 +7532,8 @@ timers-browserify@^1.0.1:
     process "~0.11.0"
 
 timers-browserify@^2.0.4:
-  version "2.0.4"
-  resolved "https://registry.yarnpkg.com/timers-browserify/-/timers-browserify-2.0.4.tgz#96ca53f4b794a5e7c0e1bd7cc88a372298fa01e6"
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/timers-browserify/-/timers-browserify-2.0.6.tgz#241e76927d9ca05f4d959819022f5b3664b64bae"
   dependencies:
     setimmediate "^1.0.4"
 
@@ -6677,6 +7543,10 @@ tmp@^0.0.33:
   dependencies:
     os-tmpdir "~1.0.2"
 
+tmpl@1.0.x:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/tmpl/-/tmpl-1.0.4.tgz#23640dd7b42d00433911140820e5cf440e521dd1"
+
 to-arraybuffer@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/to-arraybuffer/-/to-arraybuffer-1.0.1.tgz#7d229b1fcc637e466ca081180836a7aabff83f43"
@@ -6703,23 +7573,34 @@ to-regex-range@^2.1.0:
     repeat-string "^1.6.1"
 
 to-regex@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/to-regex/-/to-regex-3.0.1.tgz#15358bee4a2c83bd76377ba1dc049d0f18837aae"
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/to-regex/-/to-regex-3.0.2.tgz#13cfdd9b336552f30b51f33a8ae1b42a7a7599ce"
   dependencies:
-    define-property "^0.2.5"
-    extend-shallow "^2.0.1"
-    regex-not "^1.0.0"
+    define-property "^2.0.2"
+    extend-shallow "^3.0.2"
+    regex-not "^1.0.2"
+    safe-regex "^1.1.0"
 
-tough-cookie@~2.3.0:
-  version "2.3.3"
-  resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.3.3.tgz#0b618a5565b6dea90bf3425d04d55edc475a7561"
+tough-cookie@>=2.3.3, tough-cookie@^2.3.3, tough-cookie@~2.3.0, tough-cookie@~2.3.3:
+  version "2.3.4"
+  resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.3.4.tgz#ec60cee38ac675063ffc97a5c18970578ee83655"
   dependencies:
     punycode "^1.4.1"
 
+tr46@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/tr46/-/tr46-1.0.1.tgz#a8b13fd6bfd2489519674ccde55ba3693b706d09"
+  dependencies:
+    punycode "^2.1.0"
+
 trim-newlines@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/trim-newlines/-/trim-newlines-1.0.0.tgz#5887966bb582a4503a41eb524f7d35011815a613"
 
+trim-newlines@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/trim-newlines/-/trim-newlines-2.0.0.tgz#b403d0b91be50c331dfc4b82eeceb22c3de16d20"
+
 trim-off-newlines@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/trim-off-newlines/-/trim-off-newlines-1.0.1.tgz#9f9ba9d9efa8764c387698bcbfeb2c848f11adb3"
@@ -6728,10 +7609,14 @@ trim-right@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/trim-right/-/trim-right-1.0.1.tgz#cb2e1203067e0c8de1f614094b9fe45704ea6003"
 
-tty-browserify@0.0.0, tty-browserify@~0.0.0:
+tty-browserify@0.0.0:
   version "0.0.0"
   resolved "https://registry.yarnpkg.com/tty-browserify/-/tty-browserify-0.0.0.tgz#a157ba402da24e9bf957f9aa69d524eed42901a6"
 
+tty-browserify@~0.0.0:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/tty-browserify/-/tty-browserify-0.0.1.tgz#3f05251ee17904dfd0677546670db9651682b811"
+
 tunnel-agent@^0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/tunnel-agent/-/tunnel-agent-0.6.0.tgz#27a5dea06b36b04a0a9966774b290868f0fc40fd"
@@ -6749,18 +7634,18 @@ type-check@~0.3.2:
     prelude-ls "~1.1.2"
 
 type-detect@^4.0.0:
-  version "4.0.6"
-  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.6.tgz#88cbce3d13bc675a63f840b3225c180f870786d7"
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.8.tgz#7646fb5f18871cfbb7749e69bd39a6388eb7450c"
 
 typedarray@^0.0.6, typedarray@~0.0.5:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
 uglify-js@3.3.x, uglify-js@^3.0.5:
-  version "3.3.7"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.3.7.tgz#28463e7c7451f89061d2b235e30925bf5625e14d"
+  version "3.3.13"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.3.13.tgz#8a1a89eeb16e2d6a66b0db2b04cb871af3c669cf"
   dependencies:
-    commander "~2.13.0"
+    commander "~2.14.1"
     source-map "~0.6.1"
 
 uglify-js@^2.4.16, uglify-js@^2.6, uglify-js@^2.8.29:
@@ -6839,6 +7724,10 @@ unset-value@^1.0.0:
     has-value "^0.3.1"
     isobject "^3.0.0"
 
+upath@^1.0.0:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/upath/-/upath-1.0.4.tgz#ee2321ba0a786c50973db043a50b7bcba822361d"
+
 upper-case@^1.1.1:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/upper-case/-/upper-case-1.1.3.tgz#f6b4501c2ec4cdd26ba78be7222961de77621598"
@@ -6887,7 +7776,7 @@ uuid@^2.0.1:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-2.0.3.tgz#67e2e863797215530dff318e5bf9dcebfd47b21a"
 
-uuid@^3.0.0, uuid@^3.0.1:
+uuid@^3.0.0, uuid@^3.0.1, uuid@^3.1.0:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.2.1.tgz#12c528bb9d58d0b9265d9a2f6f0fe8be17ff1f14"
 
@@ -6898,11 +7787,11 @@ v8flags@^2.0.2:
     user-home "^1.1.1"
 
 validate-npm-package-license@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/validate-npm-package-license/-/validate-npm-package-license-3.0.1.tgz#2804babe712ad3379459acfbe24746ab2c303fbc"
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/validate-npm-package-license/-/validate-npm-package-license-3.0.3.tgz#81643bcbef1bdfecd4623793dc4648948ba98338"
   dependencies:
-    spdx-correct "~1.0.0"
-    spdx-expression-parse "~1.0.0"
+    spdx-correct "^3.0.0"
+    spdx-expression-parse "^3.0.0"
 
 verror@1.10.0:
   version "1.10.0"
@@ -6996,13 +7885,32 @@ vm-browserify@0.0.4, vm-browserify@~0.0.1:
   dependencies:
     indexof "0.0.1"
 
+w3c-hr-time@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/w3c-hr-time/-/w3c-hr-time-1.0.1.tgz#82ac2bff63d950ea9e3189a58a65625fedf19045"
+  dependencies:
+    browser-process-hrtime "^0.1.2"
+
+walker@~1.0.5:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/walker/-/walker-1.0.7.tgz#2f7f9b8fd10d677262b18a884e28d19618e028fb"
+  dependencies:
+    makeerror "1.0.x"
+
+watch@~0.18.0:
+  version "0.18.0"
+  resolved "https://registry.yarnpkg.com/watch/-/watch-0.18.0.tgz#28095476c6df7c90c963138990c0a5423eb4b986"
+  dependencies:
+    exec-sh "^0.2.0"
+    minimist "^1.2.0"
+
 watchpack@^1.4.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/watchpack/-/watchpack-1.4.0.tgz#4a1472bcbb952bd0a9bb4036801f954dfb39faac"
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/watchpack/-/watchpack-1.5.0.tgz#231e783af830a22f8966f65c4c4bacc814072eed"
   dependencies:
-    async "^2.1.2"
-    chokidar "^1.7.0"
+    chokidar "^2.0.2"
     graceful-fs "^4.1.2"
+    neo-async "^2.5.0"
 
 wcwidth@^1.0.0:
   version "1.0.1"
@@ -7010,6 +7918,10 @@ wcwidth@^1.0.0:
   dependencies:
     defaults "^1.0.3"
 
+webidl-conversions@^4.0.1, webidl-conversions@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-4.0.2.tgz#a855980b1f0b6b359ba1d5d9fb39ae941faa63ad"
+
 webpack-dependency-suite@^2.4.4:
   version "2.4.5"
   resolved "https://registry.yarnpkg.com/webpack-dependency-suite/-/webpack-dependency-suite-2.4.5.tgz#e2d3c9a178140edb7be41de57413a31cb2f11ec0"
@@ -7042,25 +7954,27 @@ webpack-sources@^1.0.1:
     source-map "~0.6.1"
 
 webpack-stream@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/webpack-stream/-/webpack-stream-4.0.0.tgz#f3673dd907d6d9b1ea7bf51fcd1db85b5fd9e0f2"
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/webpack-stream/-/webpack-stream-4.0.2.tgz#7b90aec71d45c8a4519ff8b5a4d59e039cfd02c0"
   dependencies:
-    gulp-util "^3.0.7"
+    fancy-log "^1.3.2"
     lodash.clone "^4.3.2"
     lodash.some "^4.2.2"
     memory-fs "^0.4.1"
+    plugin-error "^1.0.1"
+    supports-color "^5.2.0"
     through "^2.3.8"
     vinyl "^2.1.0"
     webpack "^3.4.1"
 
 webpack@^3.4.1:
-  version "3.10.0"
-  resolved "https://registry.yarnpkg.com/webpack/-/webpack-3.10.0.tgz#5291b875078cf2abf42bdd23afe3f8f96c17d725"
+  version "3.11.0"
+  resolved "https://registry.yarnpkg.com/webpack/-/webpack-3.11.0.tgz#77da451b1d7b4b117adaf41a1a93b5742f24d894"
   dependencies:
     acorn "^5.0.0"
     acorn-dynamic-import "^2.0.0"
-    ajv "^5.1.5"
-    ajv-keywords "^2.0.0"
+    ajv "^6.1.0"
+    ajv-keywords "^3.1.0"
     async "^2.1.2"
     enhanced-resolve "^3.4.0"
     escope "^3.6.0"
@@ -7080,6 +7994,20 @@ webpack@^3.4.1:
     webpack-sources "^1.0.1"
     yargs "^8.0.2"
 
+whatwg-encoding@^1.0.1, whatwg-encoding@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/whatwg-encoding/-/whatwg-encoding-1.0.3.tgz#57c235bc8657e914d24e1a397d3c82daee0a6ba3"
+  dependencies:
+    iconv-lite "0.4.19"
+
+whatwg-url@^6.4.0:
+  version "6.4.0"
+  resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-6.4.0.tgz#08fdf2b9e872783a7a1f6216260a1d66cc722e08"
+  dependencies:
+    lodash.sortby "^4.7.0"
+    tr46 "^1.0.0"
+    webidl-conversions "^4.0.1"
+
 which-module@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-1.0.0.tgz#bba63ca861948994ff307736089e3b96026c2a4f"
@@ -7088,7 +8016,7 @@ which-module@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-2.0.0.tgz#d9ef07dce77b9902b8a3a8fa4b31c3e3f7e6e87a"
 
-which@^1.2.10, which@^1.2.14, which@^1.2.9, which@^1.3.0:
+which@^1.2.10, which@^1.2.12, which@^1.2.14, which@^1.2.9, which@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/which/-/which-1.3.0.tgz#ff04bdfc010ee547d780bec38e1ac1c2777d253a"
   dependencies:
@@ -7127,14 +8055,6 @@ wrappy@1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
 
-write-file-atomic@^1.1.4:
-  version "1.3.4"
-  resolved "https://registry.yarnpkg.com/write-file-atomic/-/write-file-atomic-1.3.4.tgz#f807a4f0b1d9e913ae7a48112e6cc3af1991b45f"
-  dependencies:
-    graceful-fs "^4.1.11"
-    imurmurhash "^0.1.4"
-    slide "^1.1.5"
-
 write-file-atomic@^2.0.0, write-file-atomic@^2.1.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/write-file-atomic/-/write-file-atomic-2.3.0.tgz#1ff61575c2e2a4e8e510d6fa4e243cce183999ab"
@@ -7167,11 +8087,22 @@ write@^0.2.1:
   dependencies:
     mkdirp "^0.5.1"
 
+ws@^4.0.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-4.1.0.tgz#a979b5d7d4da68bf54efe0408967c324869a7289"
+  dependencies:
+    async-limiter "~1.0.0"
+    safe-buffer "~5.1.0"
+
 xml-char-classes@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/xml-char-classes/-/xml-char-classes-1.0.0.tgz#64657848a20ffc5df583a42ad8a277b4512bbc4d"
 
-"xtend@>=4.0.0 <4.1.0-0", xtend@^4.0.0, xtend@~4.0.1:
+xml-name-validator@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/xml-name-validator/-/xml-name-validator-3.0.0.tgz#6ae73e06de4d8c6e47f9fb181f78d648ad457c6a"
+
+"xtend@>=4.0.0 <4.1.0-0", xtend@^4.0.0, xtend@^4.0.1, xtend@~4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"
 
@@ -7195,15 +8126,15 @@ yargs-parser@^7.0.0:
   dependencies:
     camelcase "^4.1.0"
 
-yargs-parser@^8.0.0, yargs-parser@^8.1.0:
+yargs-parser@^8.1.0:
   version "8.1.0"
   resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-8.1.0.tgz#f1376a33b6629a5d063782944da732631e966950"
   dependencies:
     camelcase "^4.1.0"
 
 yargs@^10.0.3:
-  version "10.1.1"
-  resolved "https://registry.yarnpkg.com/yargs/-/yargs-10.1.1.tgz#5fe1ea306985a099b33492001fa19a1e61efe285"
+  version "10.1.2"
+  resolved "https://registry.yarnpkg.com/yargs/-/yargs-10.1.2.tgz#454d074c2b16a51a43e2fb7807e4f9de69ccb5c5"
   dependencies:
     cliui "^4.0.0"
     decamelize "^1.1.1"