.travis.yml in fernet-1.6 vs .travis.yml in fernet-2.0.rc1

@@ -1,9 +1,9 @@
 language: ruby
 
 rvm:
   - "1.9.3"
   - "1.9.2"
-  - rbx-19mode
-  - "1.8.7"
+  - "2.0.0"
+  - "ruby-head"
 
 script: bundle exec rspec -b spec