appraise "rails-4-2" do
  gem "rails", "~> 4.2.0"
end

appraise "rails-5-0" do
  gem "rails", "~> 5.0.0"
  gem "rspec-rails", "~> 3.5"
end

appraise "rails-5-1" do
  gem "rails", github: "rails/rails"
  gem "arel", github: "rails/arel"
  gem "rspec-rails", "~> 3.5"
end
