.travis.yml in upsert-2.1.1 vs .travis.yml in upsert-2.1.2

@@ -1,9 +1,10 @@
 language: ruby
 global:
   - USERNAME=travis
     PASSWORD=
 rvm:
+  - 2.3.0
   - 2.2.0
   - 2.1.0
   - 1.9.3
   - rbx-2
 env: