Update the badge link to Read The Docs. #161

	name: Run test suite

	on: [push, pull_request]

	jobs:
	tests:
	name: python ${{ matrix.python-version }}
	runs-on: ubuntu-20.04

	strategy:
	matrix:
	python-version: [3.6, 3.7, 3.8, 3.9, "3.10", "3.11", "3.12", "pypy3.9"]
	pytest-extra-options: ["--strict-config -W \"ignore:pkg_resources is deprecated\""]
	include:
	- python-version: "pypy2.7"
	pytest-extra-options: ""
	- python-version: "3.13.0-beta.2"
	pytest-extra-options: "--strict-config -W \"ignore:pkg_resources is deprecated\" -W ignore::DeprecationWarning"
	fail-fast: false

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install genshi
	run: \|
	pip install -e .

	- name: Install testing requirements
	run: \|
	pip install setuptools pytest

	- name: Run test suite
	run: \|
	pytest -Werror --strict-markers --verbosity=1 --color=yes ${{ matrix.pytest-extra-options }} genshi
	# Above flags are:
	# -Werror
	# treat warnings as errors
	# --strict-config
	# error out if the configuration file is not parseable
	# --strict-markers
	# error out if a marker is used but not defined in the
	# configuration file
	# --verbosity=1
	# turn the verbosity up so pytest prints the names of the tests
	# it's currently working on
	# --color=yes
	# force coloured output in the terminal

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