appraise 'activerecord-5.1' do
  gem 'activerecord', "~> 5.1.1"
end

appraise 'activerecord-5.0' do
  gem 'activerecord', "~> 5.0.3"
end

appraise "activerecord-4.2" do
  gem "activerecord", "~> 4.2.8"
end