.travis.yml in asset_cloud-2.2.4 vs .travis.yml in asset_cloud-2.2.5

@@ -1,8 +1,6 @@
 language: ruby
 before_install:
   - gem install bundler
 rvm:
-  - '1.9.3'
-  - '2.0'
-  - '2.1'
-  - 2.1.2
+  - '2.2'
+  - '2.3'