gdk-pixbuf v2.43.2

2.43.2 (development)
===

- Make the thumbnailer optional
- Add a glycin loader. Glycin is a sandboxed image loading framework that
  is written in rust, and supports more image formats than gdk-pixbuf ever
  did. On Linux, we recommend that you build gdk-pixbuf with *only* the
  glycin loaders, and rely on glycin for thumbnailers too. Like this:

  meson configure -Dpng=disabled                \
                  -Dtiff=disabled               \
                  -Djpeg=disabled               \
                  -Dgif=disabled                \
                  -Dothers=disabled             \
                  -Dglycin=enabled              \
                  -Dbuiltin_loaders='glycin'    \
                  -Dthumbnailer=disabled

  Note that this change has some potential for fallout: use of gdk-pixbuf
  (e.g. for pixdata conversions) will fail if bubblewrap sandboxing is not
  available (as is the case in many build systems). The recommendation is
  to simply stop using pixdata as a format for resources, and just use png.
- Deprecate "gtk_doc" configuration option; to conform with the rest of the
  GNOME core libraries, use "documentation" instead
- Remove the long-since deprecated "docs" configuration option
- Require Meson 1.0 to build gdk-pixbuf
- Deprecate the XPM-related API; the XPM loader is disabled by default,
  and we have better API for loading those kinds of assets, though nobody
  should be shipping XPM files in 2025