.travis.yml in fluent-plugin-map-0.1.3 vs .travis.yml in fluent-plugin-map-0.2.0

@@ -1,9 +1,12 @@
 language: ruby
+before_install:
+  - gem update bundler
+
 rvm:
   - 2.1
   - 2.2
-before_install:
-  - gem update bundler
+  - 2.3.3
+  - 2.4.0
 gemfile:
-  - gemfiles/fluentd_0_10.gemfile
-  - gemfiles/fluentd_0_12.gemfile
+  - gemfiles/fluentd_0_14.gemfile
+  - Gemfile