.travis.yml in fluent-plugin-gcloud-pubsub-custom-1.0.2 vs .travis.yml in fluent-plugin-gcloud-pubsub-custom-1.0.3

@@ -1,11 +1,12 @@
 language: ruby
 
 rvm:
   - 2.1
-  - 2.2.5
-  - 2.3.3
-  - 2.4.0
+  - 2.2
+  - 2.3.6
+  - 2.4.3
+  - 2.5.0
   - ruby-head
 
 gemfile:
  - Gemfile