Bump six from 1.10.0 to 1.11.0 in /backend/uclapi
Bump six from 1.10.0 to 1.11.0 in /backend/uclapi

Bumps [six](https://github.com/benjaminp/six) from 1.10.0 to 1.11.0.
- [Changelog](https://github.com/benjaminp/six/blob/master/CHANGES)
- [Commits](https://github.com/benjaminp/six/compare/1.10.0...1.11.0)
uclapi/uclapi,uclapi/uclapi,uclapi/uclapi,uclapi/uclapi