.travis.yml in config_curator-0.5.0 vs .travis.yml in config_curator-1.0.0

@@ -1,9 +1,12 @@
 language: ruby
 rvm:
   - 2.0.0
-  - 2.1.6
-  - 2.2.2
+  - 2.1.10
+  - 2.2.4
+  - 2.3.3
+  - 2.4.2
+  - 2.5.0
 cache: bundler
 sudo: false
 
 before_install:
   - 'echo ''gem: --no-document'' > ~/.gemrc'