message: ci: use yarn cache and cache node_modules
diff: @@ -21,6 +21,11 @@ before_script:
  script:
  - yarn cover
  +cache:
  + yarn: true
  + directories:
  + - node_modules
  +
  after_script:
  - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT
  - cat ./coverage/lcov.info | ./node_modules/.bin/codacy-coverage
  