multimedia/mkclean: Upgrade to 0.9.0

From: T M <>
Date: Wed, 23 Feb 2022 15:00:38 UTC

multimedia/mkclean does not have a maintainer. I'm not sure if I
can be a maintainer at the moment, but I did come up with a patch
to upgrade the port. I'm not very experienced with ports, so I hope
I did it properly.

Could someone take a look at this?

Thank you.