appraise 'rails-4' do
  gem 'rails', '~> 4.2.11'
end

appraise 'rails-5.0' do
  gem 'rails', '~> 5.0.7'
end

appraise 'rails-5.1' do
  gem 'rails', '~> 5.1.6'
end

appraise 'rails-5.2' do
  gem 'rails', '~> 5.2.2'
end