Update rubopcop (#227)

* Update rubopcop [WIP]

* Further rubocop fixes

* Fix rubocop-rails cops

* Fix spec

* Disable rubocop suggestions

* Run rubocop in github actions rather than in codeclimate

Appraisals

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 appraise 'rails-71' do
   gem 'actionpack', '~> 7.1.0'
   gem 'railties', '~> 7.1.0'