Temporarily lock minitest to 5.2 to avoid test failures on minitest 6.0 (#43609)

Patch by Katsuya HIDAKA (user:hidakatsuya).


git-svn-id: https://svn.redmine.org/redmine/trunk@24213 e93f8b46-1217-0410-a6f0-8f06a7374b81

Gemfile

@@ -123,6 +123,8 @@ group :test do
   gem 'bundle-audit', require: false
   # for testing oauth provider capabilities
   gem 'oauth2'
+  # Lock minitest to 5.x until a Rails release includes support for minitest 6.0
+  gem 'minitest', '~> 5.27'
 end
 
 local_gemfile = File.join(File.dirname(__FILE__), "Gemfile.local")