.travis.yml in fluent-plugin-out-http-0.1.4 vs .travis.yml in fluent-plugin-out-http-0.2.0

@@ -1,21 +1,21 @@
 rvm:
-  - 1.9.3
-  - 2.0.0
   - 2.1
   - 2.2
+  - 2.3
+  - 2.4.0
   - ruby-head
-  - rbx-2
 
 os:
   - linux
   - osx
 
+dist: trusty
+
 gemfile:
   - Gemfile
 
 script: bundle exec rake test
 
 matrix:
   allow_failures:
     - rvm: ruby-head
-    - rvm: rbx-2