.travis.yml in omniauth-google-oauth2-0.2.1 vs .travis.yml in omniauth-google-oauth2-0.2.2

@@ -1,6 +1,8 @@
+before_install:
+  - gem update --system 2.1.11
 language: ruby
 rvm:
   - "1.8.7"
   - "1.9.2"
   - "1.9.3"
-  - "2.0.0"
\ No newline at end of file
+  - "2.0.0"