appraise 'rails-4' do
  gem 'activesupport', '4.2.10'
end

appraise 'rails-5.0' do
  gem 'activesupport', '5.0.6'
end

appraise 'rails-5.1' do
  gem 'activesupport', '5.1.4'
end

appraise 'rails-5.2' do
  gem 'activesupport', '5.2.0'
end