Bump tldextract from 2.1.0 to 2.2.0 in /backend/uclapi
Bump tldextract from 2.1.0 to 2.2.0 in /backend/uclapi

Bumps [tldextract](https://github.com/john-kurkowski/tldextract) from 2.1.0 to 2.2.0.
- [Changelog](https://github.com/john-kurkowski/tldextract/blob/master/CHANGELOG.md)
- [Commits](https://github.com/john-kurkowski/tldextract/compare/2.1.0...2.2.0)
uclapi/uclapi,uclapi/uclapi,uclapi/uclapi,uclapi/uclapi