.travis.yml in jbuilder-2.5.0 vs .travis.yml in jbuilder-2.6.0

@@ -5,11 +5,11 @@
 
 rvm:
   - 1.9
   - 2.0
   - 2.1
-  - 2.2.4
-  - 2.3.0
+  - 2.2.5
+  - 2.3.1
   - ruby-head
   - jruby-19mode
   - rbx
 
 gemfile: