BEHAVIOR: mege `setup.cfg` into `pyproject.toml` #269

Job	Run time
style / Determine skipped pre-commit hooks	14s
pytest / Determine job matrix	10s
pytest / Run unit tests (3.10, ubuntu-22.04)	21s
pytest / Run unit tests (3.11, ubuntu-22.04)	30s
pytest / Run unit tests (3.7, ubuntu-22.04)	33s
pytest / Run unit tests (3.9, ubuntu-22.04)	29s
pytest / Run unit tests (3.6, ubuntu-20.04)	14s
pytest / Run unit tests (3.8, ubuntu-22.04, repoma)	26s
pytest / Run unit tests (3.9, macos-12)	41s
style / Run local pre-commit hooks	39s
style / Run taplo through pre-commit	37s
style / Push changes	0s
	4m 54s

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