[mkesper]

Pyproject.toml is a right step afaict but man is it complicated: "Please note that some of these configurations are deprecated, obsolete or at least discouraged, but they are made available to ensure portability." Core vs setuptools-specific etc. See https://setuptools.pypa.io/en/latest/userguide/pyproject_con... and https://packaging.python.org/en/latest/specifications/declar...