language: ruby
rvm:
  - 2.3.4

gemfile:
  - gemfiles/rails_4.gemfile
  - gemfiles/rails_5.gemfile

language: ruby
rvm:
  - 2.4.4
  - 2.5.1

gemfile:
  - gemfiles/rails_4.gemfile
  - gemfiles/rails_5.gemfile

Test against multiple ruby versions on Travis
Test against multiple ruby versions on Travis
