.travis.yml in clockwork-2.0.0 vs .travis.yml in clockwork-2.0.1

@@ -4,9 +4,10 @@
 rvm:
   - 1.9.3
   - 2.0.0
   - 2.1
   - 2.2
+  - ruby-2.3.1
   - jruby-19mode
   - # rbx-2.2.7
 gemfile:
   - gemfiles/activesupport3.gemfile
   - gemfiles/activesupport4.gemfile