departure.gemspec in departure-6.6.0 vs departure.gemspec in departure-6.7.0

@@ -3,14 +3,10 @@
 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', '!= 7.0.0', '< 7.2.0'])
-
 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', 'Guillermo Iguaran']
   spec.email         = ['[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]', '[e-mail]']
@@ -21,15 +17,16 @@
   spec.license       = 'MIT'
 
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.4.0'
+  spec.required_ruby_version = '>= 2.7.0'
 
-  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', '<= 0.5.5'
+  spec.add_runtime_dependency 'railties', '>= 6.0.0', '!= 7.0.0', '< 7.2.0'
+  spec.add_runtime_dependency 'activerecord', '>= 6.0.0', '!= 7.0.0', '< 7.2.0'
+  spec.add_runtime_dependency 'mysql2', '>= 0.4.0', '< 0.6.0'
 
+  spec.add_development_dependency 'appraisal', '~> 2.4.1'
   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 'pry-byebug'
   spec.add_development_dependency 'climate_control', '~> 0.0.3'