.travis.yml in adapter-0.7.0 vs .travis.yml in adapter-0.7.1

@@ -1,8 +1,8 @@
 language: ruby
 rvm:
-  - 1.8.7
-  - ree
   - 1.9.3
-notifications:
-  email: false
+  - 2.0
+  - 2.1
+  - 2.2
 bundler_args: --without guard
+before_install: gem install bundler