gtk+ 3.22.12 release, fixing a number of bugs:

• 686838 gtk_enumerate_printers() hangs
• 734946 Implement GContentType on OSX
• 773228 third parameter of gtk_widget_intersect not listed as 'out'
• 776472 Crash in gnome-terminal due to gdk_window_process_all_updates calling...
• 778853 propagate-natural-width/height request too much with !overlay-scrolling...
• 779081 GtkTextView: expose API to get Pango line direction
• 779184 Gtk+4 (3.89.4) with Quartz backend: all apps segfault
• 780041 Optionally depend on sassc to generate the theme CSS
• 780234 gtk_print_job_set_page_ranges() has unclear ownership transfer
• 780734 flowbox: don’t try to focus or draw NULL widgets
• 780735 flowbox: don’t select when rubberbanding over nothing
• 780878 docs: Point links to correct versions
• 780994 Icons are blurry