Update travis auto deploy to npm

.travis.yml

@@ -1,34 +1,18 @@
 language: node_js
 node_js:
 - 8.9.3
-
 branches:
   only:
-      - master # (PRs to master, master merges, master pushes)
-
+  - master
 env:
   global:
-    - CI_BUILD_NUMBER=$TRAVIS_BUILD_NUMBER
-    - secure: "Kxy+3yhmNSCtAD5HCVvk/WcII8ULI8QQ/UTdDnhvmLWMCGNAI53JxZ1QNP+n4S6ZynU+SFsu/zWqFVN6+moOhKn/9ZAo1Ia2WWrArgAVU5hT+NyJzyJOrq6hrVgCu4hHdYtiJIV8CJyZnyYqQK0WmXdLemxaPmG/GN6SYjv0Z5k="
-
-before_install:
-  - echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > .npmrc
-
-after_script:
-  - git config --global user.email "[email protected]"
-  - git config --global user.name "Travis CI"
-  - >
-    [ "${TRAVIS_BRANCH}" = "master" ] && [ "${TRAVIS_PULL_REQUEST}" = "false" ] &&
-    export GIT_TAG=$(make version) ||
-    export GIT_TAG=$(make version)-beta
-  - >
-    [ "${TRAVIS_BRANCH}" = "master" ] && [ "${TRAVIS_PULL_REQUEST}" = "false" ] &&
-    export NPM_TAG=latest ||
-    export NPM_TAG=beta
-  - echo "GIT_TAG=$GIT_TAG"
-  - echo "NPM_TAG=$NPM_TAG"
-  - >
-    [ "${TRAVIS_BRANCH}" != "master" ] &&
-    echo "skipping versioning" ||
-    npm version $GIT_TAG -m "Version $GIT_TAG built by Travis CI - https://travis-ci.com/$TRAVIS_REPO_SLUG/builds/$TRAVIS_JOB_ID" &&
-    npm publish --tag $NPM_TAG
+  - CI_BUILD_NUMBER=$TRAVIS_BUILD_NUMBER
+  - secure: Kxy+3yhmNSCtAD5HCVvk/WcII8ULI8QQ/UTdDnhvmLWMCGNAI53JxZ1QNP+n4S6ZynU+SFsu/zWqFVN6+moOhKn/9ZAo1Ia2WWrArgAVU5hT+NyJzyJOrq6hrVgCu4hHdYtiJIV8CJyZnyYqQK0WmXdLemxaPmG/GN6SYjv0Z5k=
+deploy:
+  provider: npm
+  email: [email protected]
+  api_key:
+    secure: dYznL6RTQQaauNKV+6wUIzoJBeIolUoUTGi5URvZ96x9+EM4mJSmCt8RCACC+5Y81T6KnWh5l6cv1MNuY2QyjtVJosoqYhNdPUB1ZfQauUI/vpNHJmnT0mN/ADSN8TjfCBfSq3TAubaAXefJ2ZsMbd344Bs0oCKrJ7C7TkBvaMs=
+  on:
+    tags: true
+    repo: alicoding/node-transifex