Add tests badge to README #4

	name: Tests

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

	jobs:
	tests:

	runs-on: ${{ matrix.operating-system }}
	strategy:
	matrix:
	operating-system: [ubuntu-latest, windows-latest]
	python-version: ["3.11"]

	steps:
	- name: Checkout code
	uses: actions/checkout@v2

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: \|
	pip install --upgrade pip
	pip install poetry==1.7
	poetry install --with dev

	- name: Run tests
	run: poetry run pytest -v

	lint:

	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v2

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: 3.11

	- name: Install dependencies
	run: \|
	pip install --upgrade pip
	pip install poetry==1.7
	poetry install

	- name: Run flake8
	run: \|
	poetry run flake8

	- name: Run mypy
	run: \|
	poetry run mypy

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