[deps] Update tldextract requirement from ~=5.1.3 to ~=5.3.0 in /images

Updates the requirements on [tldextract](https://github.com/john-kurkowski/tldextract) to permit the latest version.
- [Release notes](https://github.com/john-kurkowski/tldextract/releases)
- [Changelog](https://github.com/john-kurkowski/tldextract/blob/master/CHANGELOG.md)
- [Commits](john-kurkowski/tldextract@5.1.3...5.3.0)

---
updated-dependencies:
- dependency-name: tldextract
  dependency-version: 5.3.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

images/openwisp_base/requirements.txt

@@ -8,7 +8,7 @@ django-cors-headers~=4.7
 django-pipeline~=4.0
 uwsgi~=2.0.28
 django-celery-email~=3.0.0
-tldextract~=5.1.3
+tldextract~=5.3.0
 # these add support for object storage
 # (eg: Amazon S3, GCS)
 django-storages~=1.14.6

images/openwisp_nginx/requirements.txt

@@ -1 +1 @@
-tldextract~=5.1.3
+tldextract~=5.3.0