Enable bundler caching on Travis CI.

JuanitoFatas · JuanitoFatas · commit dac3dc805414 · 2015-03-02T21:06:09.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,5 @@
 bundler_args: --retry=3 --jobs=3
+cache: bundler
 language: ruby
 rvm:
   - 2.0
