Update Rubocop preferences so Hound can complain about:
Using instance variables in specs.
Not having file paths of specs matching the name of the things being tested.
Having context descriptions start with unnecessary "should"s.
Having duplicate and scattered hooks.
Having "all" hooks that lead to state leaking between specs.
And so much more!
Style guide for RSpec: https://rspec.rubystyle.guide/
How to test: none, it's just Hound.