Add compatibility with Python3.7 #6

	---
	name: Lint and test

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

	jobs:
	lint:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.7", "3.11", "pypy3.10"]
	steps:
	- uses: actions/checkout@v3
	- name: Install poetry
	run: pipx install poetry
	- uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	cache: "poetry"
	- name: Install dependencies
	run: poetry install --no-interaction --no-root --with dev
	- name: Check code formatting
	run: poetry run black .
	- name: Lint code
	run: poetry run pyright
	- name: Run tests
	run: poetry run pytest

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