Version 1.64.3
--------------

- Closed bugs and merge requests:
 * arg: Don't sink GClosure ref if it's a return value [!426, Philip Chimento]
 * overrides/Gtk: Adjust gtk_container_child_set_property() check [!431,
   Florian Müllner]
 * 1.63.3: test suite is failing [#298, !430, Philip Chimento]
 * Simplify private pointers [!434, Philip Chimento]

- Various backports:
 * Use memory GSettings backend in tests [Philip Chimento]
 * Update debug message from trimLeft/trimRight to trimStart/trimEnd [Philip
   Chimento]
 * Various fixes for potential crash and memory issues [Philip Chimento]

Version 1.58.8
--------------

- Various backports
 * 1.63.3: test suite is failing [Philip Chimento]
 * Various fixes for potential crash and memory issues [Philip Chimento]