.travis.yml in climate_control-0.0.4 vs .travis.yml in climate_control-0.1.0

@@ -1,10 +1,11 @@
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1.5
+  - 2.2.6
+  - 2.3.3
+  - 2.4.0
 before_install:
   - gem update --system
+  - gem update bundler
 install: "bundle install"
 branches:
   only:
     - master