Update rubocop for ruby 2.7+

Author: p

ruby-2.7.gemfile

@@ -46,12 +46,10 @@ group :check do
   gem 'ruby_memcheck', '>= 3' if RUBY_VERSION >= '3.4.0' && RUBY_PLATFORM != 'java'
   gem 'standard', require: false
 
-  # 1.50 is the last version to support Ruby 2.6
-  gem 'rubocop', '~> 1.50.0', require: false
+  gem 'rubocop', '~> 1.50', require: false
   gem 'rubocop-packaging', '~> 0.5.2', require: false
   gem 'rubocop-performance', '~> 1.9', require: false
-  # 2.20 is the last version to support Ruby 2.6
-  gem 'rubocop-rspec', ['~> 2.20', '< 2.21'], require: false
+  gem 'rubocop-rspec', '~> 2.20', require: false
 end
 
 group :dev do

ruby-3.0.gemfile

@@ -45,12 +45,10 @@ gem 'webrick', '>= 1.7.0'
 group :check do
   gem 'standard', require: false
 
-  # 1.50 is the last version to support Ruby 2.6
-  gem 'rubocop', '~> 1.50.0', require: false
+  gem 'rubocop', '~> 1.50', require: false
   gem 'rubocop-packaging', '~> 0.5.2', require: false
   gem 'rubocop-performance', '~> 1.9', require: false
-  # 2.20 is the last version to support Ruby 2.6
-  gem 'rubocop-rspec', ['~> 2.20', '< 2.21'], require: false
+  gem 'rubocop-rspec', '~> 2.20', require: false
 end
 
 group :dev do

ruby-3.1.gemfile

@@ -48,12 +48,10 @@ group :check do
   gem 'steep', '~> 1', '>= 1.9.1', require: false
   gem 'standard', require: false
 
-  # 1.50 is the last version to support Ruby 2.6
-  gem 'rubocop', '~> 1.50.0', require: false
+  gem 'rubocop', '~> 1.50', require: false
   gem 'rubocop-packaging', '~> 0.5.2', require: false
   gem 'rubocop-performance', '~> 1.9', require: false
-  # 2.20 is the last version to support Ruby 2.6
-  gem 'rubocop-rspec', ['~> 2.20', '< 2.21'], require: false
+  gem 'rubocop-rspec', '~> 2.20', require: false
 end
 
 group :dev do

ruby-3.2.gemfile

@@ -47,12 +47,10 @@ group :check do
   gem 'steep', '~> 1', '>= 1.9.1', require: false
   gem 'standard', require: false
 
-  # 1.50 is the last version to support Ruby 2.6
-  gem 'rubocop', '~> 1.50.0', require: false
+  gem 'rubocop', '~> 1.50', require: false
   gem 'rubocop-packaging', '~> 0.5.2', require: false
   gem 'rubocop-performance', '~> 1.9', require: false
-  # 2.20 is the last version to support Ruby 2.6
-  gem 'rubocop-rspec', ['~> 2.20', '< 2.21'], require: false
+  gem 'rubocop-rspec', '~> 2.20', require: false
 end
 
 group :dev do

ruby-3.3.gemfile

@@ -46,12 +46,10 @@ group :check do
   gem 'steep', '~> 1', '>= 1.9.1', require: false
   gem 'standard', require: false
 
-  # 1.50 is the last version to support Ruby 2.6
-  gem 'rubocop', '~> 1.50.0', require: false
+  gem 'rubocop', '~> 1.50', require: false
   gem 'rubocop-packaging', '~> 0.5.2', require: false
   gem 'rubocop-performance', '~> 1.9', require: false
-  # 2.20 is the last version to support Ruby 2.6
-  gem 'rubocop-rspec', ['~> 2.20', '< 2.21'], require: false
+  gem 'rubocop-rspec', '~> 2.20', require: false
 end
 
 group :dev do

ruby-3.4.gemfile

@@ -50,12 +50,10 @@ group :check do
   gem 'ruby_memcheck', '>= 3'
   gem 'standard', require: false
 
-  # 1.50 is the last version to support Ruby 2.6
-  gem 'rubocop', '~> 1.50.0', require: false
+  gem 'rubocop', '~> 1.50', require: false
   gem 'rubocop-packaging', '~> 0.5.2', require: false
   gem 'rubocop-performance', '~> 1.9', require: false
-  # 2.20 is the last version to support Ruby 2.6
-  gem 'rubocop-rspec', ['~> 2.20', '< 2.21'], require: false
+  gem 'rubocop-rspec', '~> 2.20', require: false
 end
 
 group :dev do

ruby-3.5.gemfile

@@ -51,12 +51,10 @@ group :check do
   gem 'ruby_memcheck', '>= 3'
   gem 'standard', require: false
 
-  # 1.50 is the last version to support Ruby 2.6
-  gem 'rubocop', '~> 1.50.0', require: false
+  gem 'rubocop', '~> 1.50', require: false
   gem 'rubocop-packaging', '~> 0.5.2', require: false
   gem 'rubocop-performance', '~> 1.9', require: false
-  # 2.20 is the last version to support Ruby 2.6
-  gem 'rubocop-rspec', ['~> 2.20', '< 2.21'], require: false
+  gem 'rubocop-rspec', '~> 2.20', require: false
 end
 
 group :dev do