.travis.yml in gems-0.6.0 vs .travis.yml in gems-0.7.0

@@ -1,8 +1,10 @@
-before_install: "gem update --system 1.3.7"
+language: ruby
 rvm:
+  - rbx-18mode
+  - rbx-19mode
+  - jruby-18mode
+  - jruby-19mode
   - 1.8.7
   - 1.9.2
   - 1.9.3
-  - jruby
-  - rbx
-  - ree
+  - ruby-head