.travis.yml in rubydns-0.6.7 vs .travis.yml in rubydns-0.7.0

@@ -1,6 +1,6 @@
 language: ruby
 rvm:
-  - "1.9.2"
-  - "1.9.3"
-  - "2.0"
-  - rbx-19mode
+rvm:
+  - 1.9.3
+  - 2.0.0
+  - 2.1.0