Update RuboCop to 1.24 (#35136).

git-svn-id: http://svn.redmine.org/redmine/trunk@21323 e93f8b46-1217-0410-a6f0-8f06a7374b81

.rubocop_todo.yml

 # This configuration was generated by
 # `rubocop --auto-gen-config --exclude-limit 20 --no-offense-counts --no-auto-gen-timestamp`
-# using RuboCop version 1.23.0.
+# using RuboCop version 1.24.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
     - 'test/unit/user_test.rb'
 
 # Cop supports --auto-correct.
-# Configuration parameters: Strict.
+# Configuration parameters: Strict, AllowedNumbers.
 Style/NumericLiterals:
   MinDigits: 9
 

Gemfile

   gem "selenium-webdriver", "~> 3.142.7"
   gem 'webdrivers', '4.6.1', require: false
   # RuboCop
-  gem 'rubocop', '~> 1.23.0'
+  gem 'rubocop', '~> 1.24.0'
   gem 'rubocop-performance', '~> 1.12.0'
   gem 'rubocop-rails', '~> 2.12.4'
 end