New contributors added to AUTHORS:
@creikey, @IronicallySerious, @LikeLakers2, @minraws, @NilsIrl,
@profan, @raphael10241024

New Platinum sponsor, added to splash screen:
Heroic Labs

Merged some duplicates via .mailmap to allow better tracking of
commit counts with `git shortlog -s -n -e --no-merges`.

Thanks to all contributors and donors for making Godot possible!