CI & deps: add Python 3.11–3.13, support urllib3 <3 (incl. v2) #252

	name: Python CI

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	python: [3.7, 3.8, 3.9, '3.10', '3.11', '3.12']
	steps:
	- uses: actions/checkout@v1
	- name: Setup Python
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python }}
	- name: Install Tox and any other packages
	run: pip install -r requirements/test.txt
	- name: Run Tox
	run: tox -e py
	- name: Upload Coverage to codecov
	run: bash <(curl -s https://codecov.io/bash)

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