.travis.yml in trema-0.9.0 vs .travis.yml in trema-0.10.0

@@ -11,14 +11,14 @@
 
 rvm:
   - 2.0
   - 2.1
   - 2.2
+  - 2.3.0
   - ruby-head
 
 matrix:
   allow_failures:
-    - rvm: 2.1
     - rvm: ruby-head
   fast_finish: true
 
 notifications:
   webhooks: