replace legacy with schema validator #285

	name: Linters

	on:
	- push
	- pull_request

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- name: Set up environment
	uses: actions/checkout@v4
	with: # no need for the history
	fetch-depth: 1
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.9'
	- name: Install dependencies
	run: \|
	pip install flake8 flake8-absolute-import flake8-black flake8-docstrings \
	flake8-isort flake8-pyproject flake8-unused-arguments \
	flake8-use-fstring pep8-naming \
	codespell tomli
	- name: Run linters
	run: python -m flake8 cubids

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