language: ruby
rvm:
  - 2.2.7
  - 2.3.4
  - 2.4.0
before_script: gem install bundler -v 1.14.6
script: bundle exec rake
env:
  - RAILS_VERSION=5.1.0
  - RAILS_VERSION=5.0.0
  - RAILS_VERSION=4.2.5