.travis.yml in fluent-plugin-config-expander-0.1.5 vs .travis.yml in fluent-plugin-config-expander-0.2.0

@@ -1,4 +1,9 @@
 language: ruby
+sudo: false
 rvm:
-  - 1.9.3
   - 2.0.0
+  - 2.1
+  - 2.2
+  - 2.3.0
+before_install:
+  - gem update bundler
\ No newline at end of file