updated github workflow action to use python3 #12

	name: Upload Python Package git maildiff

	on: push

	permissions:
	contents: read

	jobs:
	build-n-publish:
	name: Build and publish Python 🐍 distributions 📦 to PyPI
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@master
	- name: Set up Python 3.7
	uses: actions/setup-python@v1
	with:
	python-version: 3.7

	- name: remove old pip
	run: sudo apt remove python-pip

	- name: wget get-pip.py
	run: wget https://bootstrap.pypa.io/get-pip.py

	- name: install pip
	run: python3 get-pip.py

	- name: setuptools version
	run: >-
	python3 -c
	"import setuptools; from setuptools import build_meta; print('Build meta: {}'.format(build_meta)); print(setuptools.__version__)"

	- name: Install pypa/build
	run: >-
	python3 -m
	pip install
	build
	--user

	- name: Build a binary wheel and a source tarball
	run: >-
	python3 -m
	build
	--sdist
	--wheel
	--outdir dist/
	.

	- name: Publish distribution 📦 to PyPI
	if: startsWith(github.ref, 'refs/tags')
	uses: pypa/gh-action-pypi-publish@release/v1
	with:
	user: __token__
	password: ${{ secrets.PYPI_API_TOKEN }}

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