gimp: Update version from 2.8.20 to 2.8.22

[NEWS][1]:

> Overview of Changes from GIMP 2.8.20 to GIMP 2.8.22
> ===================================================
>
> GUI:
>
>  - improve drawing performance in single window mode, especially with
>    pixmap themes
>
>
> macOS DMG:
>
>  - Make the launcher script also set BABL_PATH
>  - Add patch for GTK+ Bug 743717 to the build which concerns crashes
>    during clipboard operations with a clipboard manager active
>  - Add patch for GTK+ Bug 767091 to the build which concerns crashes
>    on some drag & drop operations
>  - generate OSX package metadata during build
>
>
> Plug-ins:
>
>  - Fix for CVE-2007-3126, a bug in the ICO plug-in which allowed
>    context-dependent attackers to cause a denial of service (crash)
>    via an ICO file with an InfoHeader containing a Height of zero.
>    We couldn't reproduce any crash in recent version, but fixed the
>    error messages for good measure
>  - Avoid creating wrong layer group structure when importing PSD
>    files (already fixed in 2.8.20, didn't make it to the NEWS)
>  - Prevent a crash in PDF plug-in if images or resolution are large
>  - stop parsing invalid PCX files early and prevent a segmentation fault
>
>
> General:
>
>  - if NOCONFIGURE is set, autogen.sh won't run configure
>  - VPATH builds for win32 targets have been fixed

[1]: https://git.gnome.org/browse/gimp/tree/NEWS?h=GIMP_2_8_22

gimp.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION gimp-2.8.20-0
+# BEE_VERSION gimp-2.8.22-0
 
 ## this file was created by bee init and should be executed to build a
 ## bee-package. (Additional hints are located at the end of this file.)