.travis.yml in grape-entity-0.4.2 vs .travis.yml in grape-entity-0.4.3

@@ -1,7 +1,18 @@
 language: ruby
+
 cache: bundler
+
 rvm:
+  - ruby-head
+  - 2.1.1
+  - 2.1.0
   - 2.0.0
   - 1.9.3
   - jruby-19mode
-  - rbx-2.1.1
+  - jruby-head
+  - rbx-2
+
+matrix:
+  allow_failures:
+    - rvm: ruby-head
+    - rvm: jruby-head