.travis.yml in libnotify-0.9.1 vs .travis.yml in libnotify-0.9.2

@@ -1,14 +1,18 @@
 language: ruby
 rvm:
   - 1.9.3
   - 2.0
   - 2.1
+  - 2.2.4
+  - 2.3.0
+  - ruby-head
   - jruby
   - jruby-head
-  - rbx-2
 matrix:
   allow_failures:
+    - rvm: ruby-head
     - rvm: jruby-head
   fast_finish: true
 before_install:
   - "sudo apt-get install libnotify4"
+  - "gem install bundler"