.travis.yml in fluent-plugin-webhdfs-1.0.0 vs .travis.yml in fluent-plugin-webhdfs-1.1.0

@@ -2,11 +2,12 @@
 language: ruby
 
 rvm:
   - 2.1
   - 2.2
-  - 2.3.1
+  - 2.3.3
+  - 2.4.0
 
 branches:
   only:
     - master
 
@@ -20,6 +21,5 @@
 
 script: bundle exec rake test
 
 gemfile:
   - Gemfile
-  - gemfiles/fluentd_v0.14.gemfile