lint

Update CI #367

	name: lint

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	lint:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v3
	- uses: actions/setup-python@v5
	with:
	python-version: "3.12"

	- name: Install dependencies
	run: \|
	pip install -r requirements_minimal_CI.txt
	pip install -r requirements_lint_CI.txt
	# Mypy also checks types in the tests/ folder
	pip install -r requirements_tests_CI.txt
	pip install build
	python -m build .

	- name: black
	run: black --check .

	- name: flake8
	run: \|
	flake8
	# Warn about complex functions.
	flake8 --exit-zero --max-complexity=10

	- name: Type checking with mypy
	run: mypy

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