appraise "rails-4.1" do
  gem "rails", "~> 4.1.0"
  gem "mysql2", ">= 0.3.13", "< 0.4"
end

appraise "rails-4.2" do
  gem "rails", "~> 4.2.0"
end

appraise "rails-5.0" do
  gem "rails", "~> 5.0.0.beta3"
end