.travis.yml in angelo-0.3.3 vs .travis.yml in angelo-0.4.0

@@ -1,12 +1,9 @@
 sudo: false
 language: ruby
 rvm:
-  - "1.9.3"
-  - "2.0.0"
-  - "2.1.2"
-  - "2.1.3"
   - "2.1.5"
+  - "2.2.0"
   - "rbx-2"
 script: rake
 matrix:
   allow_failures:
     - rvm: rbx-2