compatibility with old python versions #57

	name: Linters

	on:
	push: {}
	workflow_dispatch: {}

	jobs:
	mypy:
	runs-on: ubuntu-latest
	timeout-minutes: 15

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python 3.12
	uses: actions/setup-python@v4
	with:
	python-version: 3.12
	- name: Install mypy
	run: pip3 install mypy
	- name: Run mypy
	working-directory: ${{github.workspace}}/
	run: \|
	mkdir .mypy_cache
	mypy . --non-interactive --cache-dir=.mypy_cache/

	flake8:
	runs-on: ubuntu-latest
	timeout-minutes: 15
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python 3.12
	uses: actions/setup-python@v4
	with:
	python-version: 3.12
	- name: Install flake8
	run: pip3 install flake8
	- name: Run flake8
	working-directory: ${{github.workspace}}/
	run: flake8 .

	black:
	runs-on: ubuntu-latest
	timeout-minutes: 15
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python 3.12
	uses: actions/setup-python@v4
	with:
	python-version: 3.12
	- name: Install black
	run: pip3 install black
	- name: Run black
	working-directory: ${{github.workspace}}/
	run: black --check .

	isort:
	runs-on: ubuntu-latest
	timeout-minutes: 15
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python 3.12
	uses: actions/setup-python@v4
	with:
	python-version: 3.12
	- name: Install isort
	run: pip3 install isort
	- name: Run isort
	working-directory: ${{github.workspace}}/
	run: isort --check .

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