As subject. (Debian currently has 1.5.9.)

1.5.19 was released 2022-02-27. As well as ~3.5 years of bugfixes (some
of which matter to me), it includes (not a complete list):

 - new utilities dsklabel, dskparse, lsgotek
 - new drivers/formats for some Apple formats and Gotek floppy emulators
 - new text-based "ldbst" format, which is very useful for fiddling with
   the details of disc images
 - bug fix for data loss in the 'rcpmfs' driver

1.5.20, released a couple of days ago, adds a change that's sufficient
to fix Debian bug #1079619, as well as a few other bugfixes and
features.