* Added support for testing unit tests with mypy.
* Added support for ignoring individual mypy error codes.
* Added missing assert on unit tests and marked xfail.
* Added type hints for some unit tests.
* Added ignores for unit tests not passing mypy.
* Fixed incorrect autouse argument in unit test fixtures.
* Fixed minor issues causing problems with mypy in unit tests.
* package-data - Test min/max setuptools version
* Fix multi-version abstraction
* Convert mypy test to script based test
* Fix f-string in pymarkdown test
* Sanity test fixes
