[gnome-music] (13 commits) Non-fast-forward update to branch wip/mschraal/type-checking

[Marinus Schraal <mschraal src gnome org>]

The branch 'wip/mschraal/type-checking' 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:

  8ca6b47... CI: Add static type checking pass
  662a675... coresong: Add static typing
  e7e6e8d... grltrackerwrapper: Cleanup timeout handling
  0600609... grltrackerwrapper: Add static type checking

Commits added to the branch:

  e191f98... pauseonsuspend: Fix calls to MusicLogger.warning() (*)
  7c95224... player: Add some debug messages (*)
  703692e... gstplayer: Switch to an asynchronous state property (*)
  514f8ba... artistsview: Remove unneeded Gtk.Frame (*)
  5cb3126... window: Prevent creating new views if already loaded (*)
  e7a37b4... coredisc: Add callback error check (*)
  c2b5a1c... grltrackerwrapper: Remove unneeded arguments (*)
  29c5bd1... songwidget: Define song_number property (*)
  f195268... songwidget: Bind coresong properties (*)
  fbaccd2... CI: Add static type checking pass
  2b551ab... coresong: Add static typing
  97d4b48... grltrackerwrapper: Cleanup timeout handling
  438db71... grltrackerwrapper: Add static type checking

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