Upgrade Babel to 7

.eslintrc.json

@@ -1,5 +1,11 @@
 {
-  "parser": "babel-eslint",
+  "parser": "@babel/eslint-parser",
+  "parserOptions": {
+    "sourceType": "module",
+		"ecmaFeatures": {
+			"legacyDecorators": true
+		}
+	},
   "plugins": ["import"],
   "rules": {
     "react/forbid-prop-types": 0,

babel.config.js

@@ -0,0 +1,16 @@
+module.exports = {
+  sourceType: "unambiguous",
+  presets: [
+    "@babel/preset-env"
+  ],
+  plugins: [
+    [
+      "@babel/plugin-proposal-decorators",
+      {
+        legacy: true
+      }
+    ],
+    ["@babel/plugin-proposal-class-properties", { loose: true }],
+    "add-module-exports"
+  ]
+};

package.json

@@ -24,9 +24,9 @@
     "switch:mobx5": "replace \"from 'mobx4'\" \"from 'mobx5'\" src -r",
     "switch:mobx4": "replace \"from 'mobx3'\" \"from 'mobx4'\" src -r",
     "switch:mobx3": "replace \"from 'mobx'\" \"from 'mobx3'\" src -r",
-    "test:mobx5": "npm run switch:mobx5 && cross-env TEST=true mocha tests --compilers js:babel-register",
-    "test:mobx4": "npm run switch:mobx4 && cross-env TEST=true mocha tests --compilers js:babel-register",
-    "test:mobx3": "npm run switch:mobx3 && cross-env TEST=true mocha tests --compilers js:babel-register",
+    "test:mobx5": "npm run switch:mobx5 && cross-env TEST=true mocha tests --compilers js:@babel/register",
+    "test:mobx4": "npm run switch:mobx4 && cross-env TEST=true mocha tests --compilers js:@babel/register",
+    "test:mobx3": "npm run switch:mobx3 && cross-env TEST=true mocha tests --compilers js:@babel/register",
     "test": "npm run test:mobx3 && npm run test:mobx4 && npm run test:mobx5 && npm run switch:mobx",
     "cover": "nyc npm test",
     "coverage:check": "nyc check-coverage --satements 95 --branches 80 --functions 95 --lines 95",
@@ -78,18 +78,17 @@
     "mobx": "^2.5.0 || ^3.0.0 || ^4.0.0 || ^5.0.0"
   },
   "devDependencies": {
+    "@babel/cli": "^7.12.1",
+    "@babel/core": "^7.12.1",
+    "@babel/eslint-parser": "^7.12.1",
+    "@babel/plugin-proposal-class-properties": "^7.12.1",
+    "@babel/plugin-proposal-decorators": "^7.12.1",
+    "@babel/preset-env": "^7.12.1",
+    "@babel/register": "^7.12.1",
     "ajv": "^5.2.2",
-    "babel-cli": "6.26.0",
-    "babel-core": "6.23.1",
-    "babel-eslint": "8.0.2",
-    "babel-loader": "7.1.4",
+    "babel-loader": "^8.0.0",
     "babel-plugin-add-module-exports": "0.2.1",
     "babel-plugin-lodash": "^3.3.4",
-    "babel-plugin-transform-class-properties": "6.23.0",
-    "babel-plugin-transform-decorators-legacy": "1.3.4",
-    "babel-preset-env": "1.7.0",
-    "babel-preset-stage-0": "6.22.0",
-    "babel-register": "6.26.0",
     "chai": "3.5.0",
     "codecov": "1.0.1",
     "commitizen": "2.9.6",