appraise 'rails-5.2' do
  gem 'rails', '~> 5.2.0'
end

#appraise 'rails-5.0' do
#  gem 'rails', '~> 5.0.0'
#end
#
#appraise 'rails-5.1' do
#  gem 'rails', '~> 5.1'
#end