[gnome-music] (7 commits) Non-fast-forward update to branch wip/mschraal/artrework

[Marinus Schraal <mschraal src gnome org>]

The branch 'wip/mschraal/artrework' 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:

  f6411ec... albumartcache: Rewrite
  c026d3a... albumartcache: Higher priority for I/O processes
  36ffb99... albumartcache: Uppercase DefaultIcon.Type enum
  4c1ae8c... Add CoverStack for smooth art transitions
  e7e0031... player: Fix MPRIS2 coverart update
  08590df... albumartcache: Optimize frame rendering

Commits added to the branch:

  646addb... Update Polish translation (*)
  3c44d62... albumartcache: Rewrite
  fa3336a... albumartcache: Higher priority for I/O processes
  11e43d4... albumartcache: Uppercase DefaultIcon.Type enum
  6ee08bb... Add CoverStack for smooth art transitions
  8bc417b... player: Fix MPRIS2 coverart update
  d6d3767... albumartcache: Optimize frame rendering

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