.travis.yml in pastel-0.4.0 vs .travis.yml in pastel-0.5.0

@@ -1,11 +1,12 @@
 language: ruby
 bundler_args: --without yard benchmarks
 script: "bundle exec rake ci"
 rvm:
   - 1.9.3
-  - 2.0.0
-  - 2.1.0
+  - 2.0
+  - 2.1
+  - 2.2
   - ruby-head
 matrix:
   include:
     - rvm: jruby-19mode
     - rvm: jruby-20mode