Update tox from 3.19.0 to 3.20.0
Update tox from 3.19.0 to 3.20.0
trungdong/cookiecutter-django,pydanny/cookiecutter-django,ryankanno/cookiecutter-django,luzfcb/cookiecutter-django,pydanny/cookiecutter-django,luzfcb/cookiecutter-django,ryankanno/cookiecutter-django,luzfcb/cookiecutter-django,luzfcb/cookiecutter-django,pydanny/cookiecutter-django,trungdong/cookiecutter-django,trungdong/cookiecutter-django,pydanny/cookiecutter-django,ryankanno/cookiecutter-django,trungdong/cookiecutter-django,ryankanno/cookiecutter-django