Bump jsonpickle from 1.2 to 1.3 in /backend/uclapi
Bump jsonpickle from 1.2 to 1.3 in /backend/uclapi

Bumps [jsonpickle](https://github.com/jsonpickle/jsonpickle) from 1.2 to 1.3.
- [Release notes](https://github.com/jsonpickle/jsonpickle/releases)
- [Commits](https://github.com/jsonpickle/jsonpickle/compare/v1.2...v1.3)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
uclapi/uclapi,uclapi/uclapi,uclapi/uclapi,uclapi/uclapi