.travis.yml in zero_push-2.4.1 vs .travis.yml in zero_push-2.5.0

@@ -1,9 +1,11 @@
 ---
 language: ruby
 rvm:
 - 1.9.3
 - 2.0.0
+- 2.1.1
+- 2.2.0
 - jruby-19mode
 notifications:
   email:
   - [e-mail]
   - [e-mail]