Modify tests to work with multiple versions of graphql-core (#460) #650

	name: Lint

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-20.04

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python 3.8
	uses: actions/setup-python@v4
	with:
	python-version: 3.8
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip wheel
	pip install tox
	- name: Run lint and static type checks
	run: tox
	env:
	TOXENV: flake8,black,import-order,mypy,manifest

Provide feedback