.travis.yml in partially_useful-0.2.1 vs .travis.yml in partially_useful-0.2.2

@@ -1,6 +1,7 @@
 script: "bundle exec rake"
 rvm:
+  - rbx-2
   - jruby-19mode
   - 1.9.3
   - 2.0.0
   - 2.1.0
   - 2.1.1