Merge pull request #356 from silvenon/travis-v1

[v1] Fix Travis CI build

Author: silvenon

.travis.yml

@@ -5,9 +5,13 @@ node_js:
   - stable
 
 cache:
+  yarn: true
   directories:
     - node_modules
 
+script:
+  - yarn test
+
 branches:
   only:
     - master