https://flake8.pycqa.org/en/latest/

1. Adicionar flake8 como dependência dev:
   https://github.com/brazilian-utils/brutils-python/blob/ddb26d99baa50b1f467360adcbb9de42a638c0dd/pyproject.toml#L34-L36
2. Rodar o flake8 no comando make format. Análogo ao black: https://github.com/brazilian-utils/brutils-python/blob/ddb26d99baa50b1f467360adcbb9de42a638c0dd/Makefile#L12

O comando make format deve rodar tanto o black quanto o flake8, algo como:

format:
	@poetry run black -l 80 . --exclude=.venv
        @poetry run flake8