.travis.yml in rack-simple_user_agent-0.1.1 vs .travis.yml in rack-simple_user_agent-0.1.2

@@ -1,4 +1,5 @@
 language: ruby
 rvm:
-  - 2.2.4
+  - 2.2
+  - 2.3.0
 before_install: gem install bundler -v 1.11.2