language: ruby
rvm:
  - 2.2
  - 2.3
  - 2.4
  - 2.5
gemfile:
  - gemfiles/sidekiq_3.x.gemfile
  - gemfiles/sidekiq_4.x.gemfile
  - gemfiles/sidekiq_5.x.gemfile
before_install:
  - gem update --system
  - gem update bundler
services: redis