.travis.yml in in_threads-1.2.2 vs .travis.yml in in_threads-1.3.0

@@ -2,9 +2,19 @@
 rvm:
   - 1.8.7
   - 1.9.2
   - 1.9.3
   - 2.0.0
+  - 2.1.0
+  - ruby-head
   - jruby-18mode
   - jruby-19mode
+  - jruby-head
   - ree
-script: "bundle exec rspec"
+script:
+  - bundle exec rspec
+  - '! bundle show rubocop || bundle exec rubocop' # run rubocop only if bundled
+matrix:
+  fast_finish: true
+  allow_failures:
+    - rvm: ruby-head
+    - rvm: jruby-head