Create branch-specific build process Travis file for Greenkeeper #119

Author: Daniel Schulz

.travis.yml

@@ -11,7 +11,7 @@ before_install:
   - yarn global add greenkeeper-lockfile@2
 
 install:
-  - yarn install --silent
+  - if [[ $TRAVIS_BRANCH == greenkeeper* ]]; then yarn install --silent; else yarn --pure-lockfile --silent; fi
 
 before_script:
   - greenkeeper-lockfile-update