display chrome version on travis

.travis.yml

@@ -10,6 +10,8 @@ node_js:
 install:
   - bundle install --deployment --jobs=3 --retry=3 --clean
   - npm install
+before_script:
+  - google-chrome-stable --product-version
 script:
   - npm test || travis_terminate 1
   - if [[ "$TRAVIS_NODE_VERSION" = "8" ]]; then npm run check-broken-links; fi