.travis.yml in fluent-plugin-cloudwatch-1.2.10 vs .travis.yml in fluent-plugin-cloudwatch-1.2.11

@@ -1,10 +1,16 @@
 language: ruby
 
 rvm:
   - 1.9.3
   - 2.0.0
-  - 2.1.5
+  - 2.1
+  - 2.2
 
 gemfile:
   - Gemfile
   - Gemfile.fluentd.0.10
+
+matrix:
+  exclude:
+    - rvm: 2.2
+      gemfile: Gemfile.fluentd.0.10