.travis.yml in postgres_ext-2.4.0.beta.1 vs .travis.yml in postgres_ext-2.4.0

@@ -1,7 +1,11 @@
+sudo: false
+language: ruby
+cache: bundler
 rvm:
 - 2.0.0
 - 2.1.2
+- 2.2.0
 
 gemfile:
   - gemfiles/Gemfile.activerecord-4.0.x
   - gemfiles/Gemfile.activerecord-4.1.x
   - gemfiles/Gemfile.activerecord-4.2.x