Gemfile in rmagick-5.4.4 vs Gemfile in rmagick-5.5.0

@@ -1,4 +1,24 @@
 source 'https://rubygems.org'
 
 # Specify your gem's dependencies in rmagick.gemspec
 gemspec
+
+gem 'pry', '~> 0.14'
+gem 'rake-compiler', '~> 1.0'
+gem 'rspec', '~> 3.8'
+gem 'rspec_junit_formatter', '~> 0.6.0'
+gem 'simplecov', '~> 0.16.1'
+gem 'yard', '~> 0.9.24'
+
+if RUBY_PLATFORM !~ /mswin|mingw/
+  gem 'rubocop', '~> 0.81.0'
+  gem 'rubocop-rspec', '~> 1.38.1'
+  gem 'rubocop-performance', '~> 1.5.2'
+end
+
+if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('3.0.0')
+  # For CI
+  gem 'rbs', '~> 3.4'
+
+  gem 'steep', '~> 1.6'
+end