Groupick

Dependency bumps:
- pytest -> security compromised under 7.2.0
- poetry -> new lock files not backwards compatible to 1.2

Minor changes:
- Make pytest a dev dependency
- Fix backspace for exiting groupick (for Mac devices)

Update groupick to match [wong2/pick v2.2.0](https://github.com/wong2/pick/releases/tag/v2.2.0)

Initial release, renamed to groupick and with correct type annotations