.travis.yml in fluent-plugin-geoip-0.1.1 vs .travis.yml in fluent-plugin-geoip-0.2.0

@@ -1,8 +1,8 @@
 language: ruby
 
 rvm:
-  - 2.1.0
+  - 2.1
   - 2.0.0
   - 1.9.3
 
 before_install:
   - sudo apt-get install libgeoip-dev