.travis.yml in carrierwave-aws-1.0.0.pre.rc.1 vs .travis.yml in carrierwave-aws-1.0.0

@@ -1,9 +1,14 @@
+sudo: false
 language: ruby
 rvm:
-- 2.1.5
-- 2.2.2
-script: bundle exec rspec spec
+  - 2.1.5
+  - 2.2.2
+  - ruby-head
+matrix:
+  allow_failures:
+    - rvm: ruby-head
+script: bundle exec rspec
 env:
   global:
   - secure: |-
       A6i5I0Y+ifiJr2yotcjMBOZxRnhaPbuDTuMW3PMMUaqHsCc2A5Tqemenb7WG
       awCHOE6i9fuO/qAOPR3iKVdkR7Qv//CDtFZ9pZ7uiqVxfz1kYbv4aoPm1IvJ