Add editing of timers incase end time needs updating.

[rogeruiz]

Detailed Description

$ tick edit --id $my_id
error: Found argument 'edit' which wasn't expected, or isn't valid in this context

USAGE:
    tick [FLAGS] [OPTIONS] [SUBCOMMAND]

For more information try --help

Context

Sometimes I leave timers running overnight, and I'd like to be able to update when I actually stopped working in case I forgot to stop it.