[Pkg-rust-maintainers] Bug#1040886: filespooler: phasing out clap version 3.

[Peter Green]

Package: filespooler
Tags: trixie, sid

We have ended up with three versions of the clap crate in Debian.
I'd like to reduce that number. Ideally to only one, but reducing
it from three versions to two would be an improvement.

I'm looking at clap v3 first for a few reasons.

* it was only the "latest version" for less than a year.
* Less software in Debian seems to use v3 than v2.
* We are currently patching clap v3 to work with newer
versions of clap-lex, I'm not sure how sustainable
this is.

I would normally file an upstream bug report first, but I was
unable to find an upstream bugtracker, the upstream source
is hosted on salsa.debian.org and the upstream developer
is a member of the Debian rust team. So filling a debian
bug immediately seemed reasonable.