ci: refactor .travis.yml

Author: borodayev

.travis.yml

@@ -1,17 +1,28 @@
+sudo: false
 language: node_js
-services:
-  - mongodb
-addons:
-  apt:
-    sources:
-    - mongodb-3.0-precise
-    packages:
-    - mongodb-org-server
-node_js:
-  - "8"
-  - "9"
-  - "10"
-before_script:
-  - npm install
+cache:
+  yarn: true
+  directories:
+    - node_modules
 notifications:
   email: true
+node_js:
+  - "10"
+  - "9"
+  - "8"
+before_install:
+  - yarn global add greenkeeper-lockfile@1
+  
+before_script: greenkeeper-lockfile-update
+after_script: greenkeeper-lockfile-upload
+script:
+  - yarn run test
+  - yarn run build
+after_success:
+  - 'curl -Lo travis_after_all.py https://git.io/travis_after_all'
+  - python travis_after_all.py
+  - export $(cat .to_export_back) &> /dev/null
+  - if [[ "$TRAVIS_JOB_NUMBER" == *.1 && "$TRAVIS_BRANCH" == "master" && "$TRAVIS_PULL_REQUEST" == "false" ]]; then bash <(curl -s https://codecov.io/bash); fi
+  - if [[ "$TRAVIS_JOB_NUMBER" == *.1 && "$TRAVIS_BRANCH" == "master" && "$TRAVIS_PULL_REQUEST" == "false" ]]; then npm run semantic-release; fi
+
+