Add more consistency tests (#4983)

Follow up fo #4971

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stubs/click/click/README.md

@@ -1,11 +0,0 @@
-# click 7.0
-
-`__init__.pyi` is almost a copy of `click/__init__.py`. It's a shortcut module
-anyway in the actual sources so it works well with minimal changes.
-
-The types are pretty complete but they were created mostly for public API use
-so some internal modules (`_compat`) or functions (`core._bashcomplete`) are
-deliberately missing. If you feel the need to add those, pull requests accepted.
-
-Speaking of pull requests, it would be great if the option decorators informed
-the type checker on what types the command callback should accept.