Target ruby 3 with rubocop

This seems to have been missed when updating requirements from ruby 2.6
to 3.

Author: ellnix

.rubocop.yml

@@ -17,7 +17,7 @@ require:
 
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 2.6
+  TargetRubyVersion: 3
   SuggestExtensions: false
   Exclude:
     - playground/**/*

spec/spec_helper.rb

@@ -42,7 +42,7 @@
 OLD_RAILS = Gem.loaded_specs['rails'].version < Gem::Version.new('4.0')
 NEW_RAILS = Gem.loaded_specs['rails'].version >= Gem::Version.new('6.0')
 
-Dir["#{File.dirname(__FILE__)}/support/*.rb"].sort.each { |file| require file }
+Dir["#{File.dirname(__FILE__)}/support/*.rb"].each { |file| require file }
 
 RSpec.configure do |c|
   c.mock_with :rspec

spec/support/active_record_classes.rb

@@ -1,5 +1,5 @@
 require 'support/active_record_schema'
-Dir["#{File.dirname(__FILE__)}/models/*.rb"].sort.each { |file| require file }
+Dir["#{File.dirname(__FILE__)}/models/*.rb"].each { |file| require file }
 
 ar_schema.instance_exec do
   create_table :uniq_users, id: false do |t|