Fix naive handling of relative links when proofing #213

	name: Python package

	on: [push, pull_request]

	jobs:
	build:

	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest]
	python-version: ["3.8", "3.9", "3.10", "3.11"]
	include:
	- os: "ubuntu-20.04"
	python-version: "3.8"

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r dev-requirements.txt
	pip install -e .
	- name: Lint with flake8
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	flake8 htmlproofer/ tests/ setup.py --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 htmlproofer/ tests/ setup.py --count --max-complexity=10 --max-line-length=127 --statistics
	- name: Type Check with mypy
	run: mypy htmlproofer
	- name: Check Import Ordering with isort
	run: isort --check .
	- name: Unit tests
	run: pytest tests/unit
	- name: Integration test with use_directory_urls = False
	run: \|
	cd tests/integration
	mkdocs build
	- name: Integration test with use_directory_urls = True
	run: \|
	cd tests/integration
	mkdocs build --use-directory-urls

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