.travis.yml in fluent-plugin-flowcounter-0.3.1 vs .travis.yml in fluent-plugin-flowcounter-0.3.2

@@ -1,4 +1,6 @@
 language: ruby
+sudo: false
 rvm:
-  - 1.9.3
   - 2.0.0
+  - 2.1
+  - 2.2