Bump djangorestframework from 3.11.0 to 3.11.2

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.11.0 to 3.11.2.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](encode/django-rest-framework@3.11.0...3.11.2)

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

Author: dependabot[bot]

requirements.txt

@@ -12,7 +12,7 @@ django-forms-bootstrap==3.1.0
 django-simple-history==2.8.0
 django-storages==1.9.1
 django-taggit==1.2.0
-djangorestframework==3.11.0
+djangorestframework==3.11.2
 docutils==0.15.2
 gunicorn==20.0.4
 idna==2.9