.travis.yml in usable-2.2.0 vs .travis.yml in usable-2.2.1

@@ -1,10 +1,6 @@
 language: ruby
 rvm:
-  - 2.0.0
-  - 2.1.0
-  - 2.1.5
-  - 2.2.0
-  - 2.2.2
-  - 2.2.3
-  - 2.3.0
+  - 2.1.10
+  - 2.2.5
+  - 2.3.1
 before_install: gem install bundler -v 1.10.5