.travis.yml in api_mailer-0.0.8 vs .travis.yml in api_mailer-0.0.9

@@ -1,9 +1,10 @@
 language: ruby
 rvm:
-  - 2.2.7
+  - 2.6.1
 gemfile:
   - gemfiles/Gemfile.rails-3.2.x
   - gemfiles/Gemfile.rails-4.0.x
   - gemfiles/Gemfile.rails-4.1.x
   - gemfiles/Gemfile.rails-5.1.x
+  - gemfiles/Gemfile.rails-6.1.x
 script: bundle exec rspec spec