.travis.yml in comment_collector-0.0.1 vs .travis.yml in comment_collector-0.0.2

@@ -1,5 +1,8 @@
 sudo: false
 language: ruby
 rvm:
+  - ruby-2.3.7
+  - ruby-2.4.4
+  - ruby-2.5.1
   - ruby-2.6.0-preview2
 before_install: gem install bundler -v 1.16.2