Stop using twisted.internet.defer.returnValue #114

	name: README render

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

	jobs:
	testing:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: 3.9

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

	- name: Test
	run: \|
	python --version
	python -m tox -e readme_render

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