Bump djangorestframework from 3.11.2 to 3.14.0

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.11.2 to 3.14.0.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](encode/django-rest-framework@3.11.2...3.14.0)

---
updated-dependencies:
- dependency-name: djangorestframework
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -69,7 +69,7 @@ django-invitations<1.9.4
 django-recaptcha==2.0.6
 
 # REST
-djangorestframework==3.11.2
+djangorestframework==3.14.0
 djangorestframework-gis==0.17
 djangorestframework-guardian==0.3.0
 drf-extensions==0.7.0