[babl] (20 commits) Non-fast-forward update to branch wip/nielsdg/generate-vapi

[Niels De Graef <nielsdg src gnome org>]

The branch 'wip/nielsdg/generate-vapi' 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:

  659031e... meson: Generate VAPI file

Commits added to the branch:

  1124c69... babl: simplify logic in babl_epsilon_for_zero (*)
  5bcddad... docs: update alpha docs (*)
  d9c757e... babl: use an enum to internally differentiate rgb, cmyk or  (*)
  446331d... babl: add support for grayscale spaces (*)
  7084fc4... babl: reduce default max path length to 3 (5) (*)
  ecfe0c8... extensions: add some u8 and u16 conversions for grayscale (*)
  c010010... extensions: add a Y' u8 to RGBA float conversion (*)
  ee4a8ba... babl: add a lock around creation of new fishes (*)
  8f58a1b... avx2, two-table: don't segfault for NaN input (*)
  cf41e05... cairo: add more little endian conversions (*)
  245f68f... cairo: remove on of the conversaions added in last commit (*)
  b6d40c4... gray: add graya to rgba expanders (*)
  1149a5f... float: add grayscale alpha and trc converters (*)
  3ba8ebb... float: add conversions to/from associated alpha for graysca (*)
  a34f523... half/sse-half: register conversions for YaA as well (*)
  6a85f56... babl: register gray and gray alpha shortcuts between spaces (*)
  88ad0ad... cairo: add code path from Y'A float (*)
  a03dd58... release 0.1.72 (*)
  cff46ae... post release version bump (*)
  859f96a... meson: Generate VAPI file

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