.travis.yml in fluent-plugin-flowcounter-simple-0.0.4 vs .travis.yml in fluent-plugin-flowcounter-simple-0.1.0

@@ -1,8 +1,11 @@
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1
-  - 2.2
+  - 2.4.*
+  - 2.5.*
+  - 2.6.*
+  - 2.7.*
+
 gemfile:
   - Gemfile
-  - Gemfile.v0.10
+
+before_install:
+  - gem update bundler