let's cache bundler

pnathan · pnathan · commit 0cd835949a9a · 2015-09-10T22:27:42.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,6 @@
 sudo: false
 language: ruby
+cache: bundler
 rvm:
 - 2.1
 
