Tell Travis to cache bundle

jmerle · Thibaut · commit c22fa4cbf1c0 · 2018-09-23T15:07:41.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,7 @@
 language: ruby
+
+cache: bundler
+
 before_script:
   - gem update --system
   - gem install bundler
