[Debian-med-packaging] Bug#885530: gwyddion: Build-Depends on unmaintained pygtk

[Jeremy Bicha]

I just want to mention that gtk 3 was declared long-term stable over a
year ago with the 3.22 series. Since then, nobody has cared enough
about gtk2 to do a bugfix release for gtk2. It's really not a good
idea to stay on gtk2 any more.

The whole point of an accelerated major release cycle is so that there
won't be a need to make breaking changes for minor releases.

Anyway, here's what the GTK developers had to say about their plans:
https://blog.gtk.org/2016/09/01/versioning-and-long-term-stability-promise-in-gtk/

This is a warning that Debian and Ubuntu may remove gtksourceview2 and
pygtk soon. Neither of those versions have had any releases since
2011.

If you give up on porting to supported libraries, I encourage you to
look into the Snap or Flatpak formats as an alternate way of bundling
and making your package available to Linux users.
https://snapcraft.io/
https://flatpak.org/

Thanks,
Jeremy Bicha