[gimp] (5 commits) Non-fast-forward update to branch wip/simon/palettestuff

[Simon Budig <simon src gnome org>]

The branch 'wip/simon/palettestuff' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  9b4d088... Get rid of image->n_colors and image->colormap
  edb498f... remove the ->position entry from GimpPaletteEntry

Commits added to the branch:

  4ba8aa2... icons: fix the native Windows build in CI with autotools. (*)
  89f06c6... NEWS: update. (*)
  73414b9... desktop: prepare an AppStream <release> tag for GIMP 2.99.1 (*)
  30dc375... Get rid of image->n_colors and image->colormap
  d5866da... remove the ->position entry from GimpPaletteEntry

(*) This commit already existed in another branch; no separate mail sent