fixes Issue #20, Issue #22, Issue #26 and Issue #29. It replaces PR #21 and PR #23 and contains alignments to the v2.2 specification #59

	name: Tests

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	test:
	runs-on: ubuntu-latest
	name: Tests
	strategy:
	matrix:
	python-version:
	- "3.8"
	- "3.9"
	- "3.10"
	steps:
	- uses: actions/checkout@v2
	- name: Install Dependencies
	run: sudo apt install libxml2-dev libxslt-dev
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install Dependencies
	run: python -m pip install -U pip wheel coverage codecov pytest
	- name: Install Dependencies
	run: python setup.py develop
	- name: Run tests
	run: coverage run -m pytest tests
	- name: Upload coverage
	run: codecov
	style:
	runs-on: ubuntu-latest
	name: Style
	steps:
	- uses: actions/checkout@v2
	- name: Install Dependencies
	run: sudo apt install libxml2-dev libxslt-dev
	- name: Set up Python 3.10
	uses: actions/setup-python@v1
	with:
	python-version: "3.10"
	- name: Install Dependencies
	run: python -m pip install -U pip wheel black isort pytest
	- name: Install Dependencies
	run: python setup.py develop
	- name: Run black
	run: black --check .

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