[Security] Bump django in /{{cookiecutter.project_name}} (#665)
[Security] Bump django in /{{cookiecutter.project_name}} (#665)

Bumps [django](https://www.djangoproject.com/) from 1.11.18 to 1.11.20. **This update includes security fixes.**

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
wemake-services/wemake-django-template,wemake-services/wemake-django-template