Update Heroku to latest 3.9.x
Update Heroku to latest 3.9.x

trungdong/cookiecutter-django,trungdong/cookiecutter-django,trungdong/cookiecutter-django,ryankanno/cookiecutter-django,pydanny/cookiecutter-django,pydanny/cookiecutter-django,pydanny/cookiecutter-django,ryankanno/cookiecutter-django,pydanny/cookiecutter-django,trungdong/cookiecutter-django,ryankanno/cookiecutter-django,ryankanno/cookiecutter-django