tacky.gemspec in tacky-0.3.5 vs tacky.gemspec in tacky-0.4.0

@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 # (The MIT License)
 #
-# Copyright (c) 2020 Yegor Bugayenko
+# Copyright (c) 2020-2023 Yegor Bugayenko
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the 'Software'), to deal
 # in the Software without restriction, including without limitation the rights
 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
@@ -22,30 +22,21 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
 require 'English'
 Gem::Specification.new do |s|
-  s.specification_version = 2 if s.respond_to? :specification_version=
-  if s.respond_to? :required_rubygems_version=
-    s.required_rubygems_version = Gem::Requirement.new('>= 0')
-  end
-  s.rubygems_version = '2.3.3'
+  s.required_rubygems_version = Gem::Requirement.new('>= 0') if s.respond_to? :required_rubygems_version=
   s.required_ruby_version = '>=2.3'
   s.name = 'tacky'
-  s.version = '0.3.5'
+  s.version = '0.4.0'
   s.license = 'MIT'
   s.summary = 'Primitive Object Memoization for Ruby'
   s.description = 'Decorate your existing Ruby object with Tacky
 and all its methods will be cached.'
   s.authors = ['Yegor Bugayenko']
   s.email = '[e-mail]'
   s.homepage = 'http://github.com/yegor256/tacky'
   s.files = `git ls-files`.split($RS)
-  s.test_files = s.files.grep(%r{^(test)/})
   s.rdoc_options = ['--charset=UTF-8']
   s.extra_rdoc_files = ['README.md']
-  s.add_development_dependency 'minitest', '5.11.3'
-  s.add_development_dependency 'rake', '12.3.1'
-  s.add_development_dependency 'rdoc', '4.3.0'
-  s.add_development_dependency 'rubocop', '0.62.0'
-  s.add_development_dependency 'rubocop-rspec', '1.31.0'
+  s.metadata['rubygems_mfa_required'] = 'true'
 end