departure.gemspec in departure-6.1.0 vs departure.gemspec in departure-6.2.0

@@ -3,25 +3,30 @@
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
 require 'departure/version'
 
+# This environment variable is set on CI to facilitate testing with multiple
+# versions of Rails.
+RAILS_DEPENDENCY_VERSION = ENV.fetch('RAILS_VERSION', ['>= 5.2.0', '< 6.1'])
+
 Gem::Specification.new do |spec|
   spec.name          = 'departure'
   spec.version       = Departure::VERSION
-  spec.authors       = ['Ilya Zayats', 'Pau Pérez', 'Fran Casas', 'Jorge Morante', 'Enrico Stano', 'Adrian Serafin', 'Kirk Haines']
-  spec.email         = ['[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]']
+  spec.authors       = ['Ilya Zayats', 'Pau Pérez', 'Fran Casas', 'Jorge Morante', 'Enrico Stano', 'Adrian Serafin', 'Kirk Haines', 'Guillermo Iguaran']
+  spec.email         = ['[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]']
 
   spec.summary       = %q(pt-online-schema-change runner for ActiveRecord migrations)
   spec.description   = %q(Execute your ActiveRecord migrations with Percona's pt-online-schema-change. Formerly known as Percona Migrator.)
   spec.homepage      = 'https://github.com/departurerb/departure'
   spec.license       = 'MIT'
 
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'rails', '~> 5.1.0'
-  spec.add_runtime_dependency 'mysql2', '~> 0.4.0'
+  spec.add_runtime_dependency 'railties', *Array(RAILS_DEPENDENCY_VERSION)
+  spec.add_runtime_dependency 'activerecord', *Array(RAILS_DEPENDENCY_VERSION)
+  spec.add_runtime_dependency 'mysql2', '>= 0.4.0', '<= 0.5.3'
 
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'rspec', '~> 3.4', '>= 3.4.0'
   spec.add_development_dependency 'rspec-its', '~> 1.2'
   spec.add_development_dependency 'byebug', '~> 8.2', '>= 8.2.1'