[gtk+] (5 commits) Non-fast-forward update to branch wip/matthiasc/font-variations

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/font-variations' 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:

  943ef08... Some initial support for font variations
  67f92b1... Add a font variations demo
  07e86d6... Redo the features part of the font features demo
  4154cd2... Add another fun demo

Commits added to the branch:

  5f98d66... Some initial support for font variations
  9ade697... Add a font variations demo
  f36feba... Redo the features part of the font features demo
  0ab0d20... Add another fun demo
  b9f97cb... Add new defines to config.h.meson