remove usage of "six" #111

	name: python3

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	testing:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10"]
	twisted-version: [tx18, tx19, tx20, tx21]
	include:
	- python-version: "3.11"
	twisted-version: "tx22"

	steps:
	- uses: actions/checkout@v2

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip tox tox-gh-actions

	- name: Unit-Test
	run: \|
	python -m tox -e py3-${{ matrix.twisted-version }}

	- name: Coveralls
	uses: coverallsapp/github-action@master
	with:
	github-token: ${{ secrets.GITHUB_TOKEN }}

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