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

@@ -11,9 +11,11 @@
   - os: linux
     rvm: 2.3
   - os: linux
     rvm: 2.4.0
   - os: linux
+    rvm: 2.5.0
+  - os: linux
     rvm: ruby-head
   allow_failures:
   - rvm: ruby-head
   fast_finish: true