appraise 'rails5.0' do
  gem 'rails', '~> 5.0.0'
end
appraise 'rails5.1' do
  gem 'rails', '~> 5.1.0'
end
appraise 'rails5.2' do
  gem 'rails', '~> 5.2.0'
end
appraise 'rails6.0' do
  gem 'rails', '~> 6.0.0'
end
