.travis.yml in usable-1.2.0 vs .travis.yml in usable-1.2.1

@@ -1,4 +1,10 @@
 language: ruby
 rvm:
-  - 2.2.1
-before_install: gem install bundler -v 1.10.4
+  - 2.0.0
+  - 2.1.0
+  - 2.1.5
+  - 2.2.0
+  - 2.2.2
+  - 2.2.3
+  - 2.3.0
+before_install: gem install bundler -v 1.10.5