.travis.yml in twurl-0.6.6 vs .travis.yml in twurl-0.6.7

@@ -1,9 +1,10 @@
 language: ruby
 rvm:
+  - rbx-18mode
+  - rbx-19mode
+  - jruby-18mode
+  - jruby-19mode
   - 1.8.7
   - 1.9.2
   - 1.9.3
-  - jruby-18mode
-  - jruby-19mode
-  - rbx-18mode
-  - rbx-19mode
+  - ruby-head