Try travis with Ruby 2.3.0

Martin Körner · Martin Körner · commit 6a30536d7c62 · 2016-02-10T15:09:49.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,6 +4,7 @@ language: ruby
 rvm:
   - 2.0
   - 2.2.3
+  - 2.3.0
   - jruby-head
 
 gemfile:
