[libadwaita] (7 commits) Non-fast-forward update to branch wip/exalm/borders-fixes

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/borders-fixes' 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:

  0cd657a... header-bar: Adjust heights
  a1a6c76... demo: Simplify the split header bar layout

Commits added to the branch:

  7b84584... animation: Refactor adw-animation into a GObject (*)
  943fb62... Fixes (*)
  392da6a... fixes (*)
  8c31695... reorder getters/setters (*)
  aadcce5... Use non-deprecated license identifier See https://spdx.org/ (*)
  c2727f0... header-bar: Adjust heights
  645c785... demo: Simplify the split header bar layout

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