language: ruby
cache: bundler
sudo: false
rvm:
  - 2.5.8
  - 2.6.6
  - 2.7.1
before_install:
  - gem install bundler
gemfile:
  - gemfiles/rails50.gemfile
  - gemfiles/rails51.gemfile
  - gemfiles/rails52.gemfile
  - gemfiles/rails60.gemfile