Change git url and git config to fix CI failure #158

	name: Python tests
	on:
	push:
	branches:
	- master
	tags:
	pull_request:
	branches:
	- master
	env:
	DEBIAN_FRONTEND: noninteractive
	TOX_VERSION: 3.23.0
	jobs:
	py38:
	name: py38
	runs-on: ubuntu-latest
	container:
	# python:3.8-buster has git>=2.20 which actions/checkout@v2 requires
	image: python:3.8-buster
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	run: \|
	pip3 install tox==${{ env.TOX_VERSION }}
	- name: Run pytest
	shell: bash
	run: \|
	git config --global --add safe.directory $(pwd)
	tox

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