.travis.yml in carrierwave-base64-2.2.0 vs .travis.yml in carrierwave-base64-2.3.0

@@ -1,15 +1,21 @@
 language: ruby
 
 rvm:
  - 2.0.0
- - 2.1.5
- - 2.2.2
+ - 2.1.9
+ - 2.2.5
+ - 2.3.1
  - ruby-head
 
+matrix:
+  allow_failures:
+    - rvm: ruby-head
+
 gemfile:
   - Gemfile
 
 sudo: false
 
-notifications:
-  email: false
+script:
+  - bundle exec rspec
+  - bundle exec rubocop