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

bin/install_git_hooks

@@ -1,6 +1,7 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
-root = File.expand_path('../../', __FILE__)
+root = File.expand_path('..', __dir__)
 hooks_dir = "#{root}/bin/git-hooks"
 
 `ls -1 #{hooks_dir}`.each_line.map(&:strip).each do |file|