.travis.yml in howitzer-1.0.1 vs .travis.yml in howitzer-1.0.2

@@ -1,4 +1,5 @@
 language: ruby
 rvm:
-  - "1.9.3"
-  - "2.0.0"
+  - 1.9.3
+  - 2.0.0
+  - 2.1.1