set readthedocs python to a version we know we have morphio wheels fo… #27

	name: Publish sdist tarball to PyPi

	on:
	push:
	tags:
	- 'v[0-9]+.[0-9]+.[0-9]+'

	jobs:
	build-n-publish:
	name: Build and publish on PyPI
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@master
	- name: Set up Python 3.9
	uses: actions/setup-python@v2
	with:
	python-version: 3.9
	- name: Build a source tarball
	run:
	python setup.py sdist

	- name: Publish distribution package to PyPI
	uses: pypa/gh-action-pypi-publish@master
	with:
	user: __token__
	password: ${{ secrets.PYPI_PASSWORD }}

Provide feedback