.travis.yml in ridgepole-0.7.1.beta5 vs .travis.yml in ridgepole-0.7.1

@@ -4,12 +4,12 @@
 language: ruby
 cache:
   - bundler
   - apt
 rvm:
-  - 2.2.7
-  - 2.3.4
-  - 2.4.1
+  - 2.2.8
+  - 2.3.5
+  - 2.4.2
 before_install:
   - gem install bundler
 before_script:
   - sudo service mysql stop
   - sudo service postgresql stop