Upgrade Heroku to the latest Python 3.6.x: 3.6.6
Upgrade Heroku to the latest Python 3.6.x: 3.6.6

ryankanno/cookiecutter-django,pydanny/cookiecutter-django,Parbhat/cookiecutter-django-foundation,luzfcb/cookiecutter-django,mistalaba/cookiecutter-django,ryankanno/cookiecutter-django,ryankanno/cookiecutter-django,trungdong/cookiecutter-django,mistalaba/cookiecutter-django,pydanny/cookiecutter-django,pydanny/cookiecutter-django,mistalaba/cookiecutter-django,trungdong/cookiecutter-django,topwebmaster/cookiecutter-django,Parbhat/cookiecutter-django-foundation,ad-m/cookiecutter-django,ad-m/cookiecutter-django,topwebmaster/cookiecutter-django,ad-m/cookiecutter-django,luzfcb/cookiecutter-django,topwebmaster/cookiecutter-django,topwebmaster/cookiecutter-django,pydanny/cookiecutter-django,luzfcb/cookiecutter-django,mistalaba/cookiecutter-django,trungdong/cookiecutter-django,luzfcb/cookiecutter-django,trungdong/cookiecutter-django,ad-m/cookiecutter-django,Parbhat/cookiecutter-django-foundation,ryankanno/cookiecutter-django,Parbhat/cookiecutter-django-foundation