Gemfile in ransack-2.1.1 vs Gemfile in ransack-2.3.0

@@ -1,11 +1,11 @@
 source 'https://rubygems.org'
 gemspec
 
 gem 'rake'
 
-rails = ENV['RAILS'] || '5-0-stable'
+rails = ENV['RAILS'] || '6-0-stable'
 
 gem 'pry'
 
 # Provide timezone information on Windows
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw]
@@ -14,32 +14,24 @@
 when /\// # A path
   gem 'activesupport', path: "#{rails}/activesupport"
   gem 'activerecord', path: "#{rails}/activerecord", require: false
   gem 'actionpack', path: "#{rails}/actionpack"
 when /^v/ # A tagged version
-  git 'git://github.com/rails/rails.git', :tag => rails do
+  git 'https://github.com/rails/rails.git', :tag => rails do
     gem 'activesupport'
     gem 'activemodel'
     gem 'activerecord', require: false
     gem 'actionpack'
   end
-  if rails >= 'v5.2.0'
-    gem 'mysql2', '~> 0.4.4'
-  end
 else
-  git 'git://github.com/rails/rails.git', :branch => rails do
+  git 'https://github.com/rails/rails.git', :branch => rails do
     gem 'activesupport'
     gem 'activemodel'
     gem 'activerecord', require: false
     gem 'actionpack'
   end
-  if rails == '3-0-stable'
-    gem 'mysql2', '< 0.3'
-  end
-  if rails == '5-2-stable'
-    gem 'mysql2', '~> 0.4.4'
-  end
 end
+gem 'mysql2', '~> 0.5.2'
 
 group :test do
   # TestUnit was removed from Ruby 2.2 but still needed for testing Rails 3.x.
   gem 'test-unit', '~> 3.0' if RUBY_VERSION >= '2.2'
   gem 'simplecov', :require => false