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

.codeclimate.yml

@@ -2,7 +2,3 @@ checks:
   method-complexity:
     config:
       threshold: 6 # should be just fine
-
-plugins:
-  rubocop:
-    enabled: true