Drop support for python 3.7 #249

	name: Lint

	on: [pull_request]

	jobs:
	linting:
	runs-on: ubuntu-20.04
	steps:
	- name: Check out repository
	uses: actions/checkout@v3
	- name: Set up python
	id: setup-python
	uses: actions/setup-python@v4
	with:
	python-version: "3.9"
	- name: Install Poetry
	uses: snok/install-poetry@v1
	with:
	virtualenvs-create: true
	virtualenvs-in-project: true
	installer-parallel: true
	- name: Load cached venv
	id: cached-poetry-dependencies
	uses: actions/cache@v2
	with:
	path: .venv
	key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}
	- name: Install dependencies
	if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
	run: poetry install --no-interaction --no-root
	- name: Install library
	run: poetry install --no-interaction
	- name: Test black
	run: \|
	source .venv/bin/activate
	black --check --diff .
	# - name: Test isort
	# run: \|
	# source .venv/bin/activate
	# isort . --check --diff
	# - name: Test pylint
	# run: \|
	# source .venv/bin/activate
	# pylint -E norfair/*/.py

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