sysutils/bfs: Update to 2.1

• Added a new -status option that displays the search progress in a bar at the bottom of the terminal
• Fixed an optimizer bug introduced in v2.0 that affected some combinations of -user/-group and -nouser/-nogroup

Changelog: https://github.com/tavianator/bfs/releases/tag/2.1

PR: 251297
Submitted by: Dries Michiels <driesm.michiels@gmail.com> (new maintainer)
Approved by: arrowd, tcberner (mentors, implicit)