build(deps): bump django from 1.11.29 to 2.2.27

Bumps [django](https://github.com/django/django) from 1.11.29 to 2.2.27.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@1.11.29...2.2.27)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -1,5 +1,5 @@
 dj-database-url==0.5.0
-Django==1.11.29
+Django==2.2.27
 django-model-utils==2.6.1
 djangorestframework==3.13.1
 psycopg2==2.9.3