Use appraisal >= 2.5 as issue requiring fixed branch was released

Author: toy

Gemfile

@@ -6,8 +6,4 @@ gemspec
 
 gem 'rake', '< 12.3' if RUBY_VERSION < '2.0'
 
-if RUBY_VERSION < '2.3'
-  gem 'appraisal', '< 2.3'
-else
-  gem 'appraisal', :git => 'https://github.com/toy/appraisal.git', :branch => 'ruby-3.2-fix-1'
-end
+gem 'appraisal', *RUBY_VERSION < '2.3' ? ['< 2.3'] : ['>= 2.5']