Update AUTHORS and DONORS list

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!

AUTHORS.md

@@ -41,11 +41,12 @@ name is available.
     Ariel Manzur (punto-)
     Bastiaan Olij (BastiaanOlij)
     Ben Brookshire (sheepandshepherd)
-    Benjamin (Nallebeorn)
+    Benjamin Larsson (Nallebeorn)
     Bernard Liebl (poke1024)
     Błażej Szczygieł (zaps166)
     Bojidar Marinov (bojidar-bg)
     bruvzg
+    Cameron Reikes (creikey)
     Camille Mohr-Daurat (pouleyKetchoupp)
     Carl Olsson (not-surt)
     Carter Anderson (cart)
@@ -57,7 +58,7 @@ name is available.
     Dharkael (lupoDharkael)
     Dmitry Koteroff (Krakean)
     DualMatrix
-    Emmanuel Barroga (sparkart)
+    Emmanuel Barroga (codecustard)
     Emmanuel Leblond (touilleMan)
     Eric Lasota (elasota)
     est31
@@ -70,8 +71,8 @@ name is available.
     Gerrit Großkopf (Grosskopf)
     Gilles Roudiere (groud)
     Guilherme Felipe de C. G. da Silva (guilhermefelipecgs)
-    Hanif A (hbina)
-    Hein-Pieter van Braam (hpvb)
+    Hanif Bin Ariffin (hbina)
+    Hein-Pieter van Braam-Stewart (hpvb)
     Hiroshi Ogawa (hi-ogawa)
     homer666
     Hubert Jarosz (Marqin)
@@ -109,8 +110,10 @@ name is available.
     Max Hilbrunner (mhilbrunner)
     merumelu
     Michael Alexsander Silva Dias (YeldhamDev)
+    MichiRecRoom (LikeLakers2)
     mrezai
     Nathan Warden (NathanWarden)
+    Nils André-Chang (NilsIrl)
     Nuno Donato (nunodonato)
     Ovnuniarchos
     Pascal Richter (ShyRed)
@@ -125,10 +128,12 @@ name is available.
     Rafał Mikrut (qarmin)
     Ralf Hölzemer (rollenrolm)
     Ramesh Ravone (RameshRavone)
+    raphael10241024
     Ray Koopa (RayKoopa)
     Rémi Verschelde (akien-mga)
     Rhody Lugo (rraallvv)
     Roberto F. Arroyo (robfram)
+    Robin Hübner (profan)
     romulox-x
     Ruslan Mustakov (endragor)
     Saniko (sanikoyes)
@@ -136,11 +141,13 @@ name is available.
     SaracenOne
     sersoong
     Simon Wenner (swenner)
+    Swarnim Arun (minraws)
     Theo Hallenius (TheoXD)
     Thomas Herzog (karroffel)
     Timo (toger5)
     Timo Schwarzer (timoschwarzer)
     Tomasz Chabora (KoBeWi)
+    Twarit Waikar (IronicallySerious)
     Vinzenz Feenstra (vinzenz)
     박한얼 (volzhs)
     V. Vamsi Krishna (vkbsb)
@@ -149,7 +156,6 @@ name is available.
     Wilson E. Alvarez (Rubonnek)
     Xavier Cho (mysticfall)
     yg2f (SuperUserNameMan)
-    Yuri Roubinski (Chaosus)
+    Yuri Roubinsky (Chaosus)
     Zher Huei Lee (leezh)
     ZuBsPaCe
-    Дмитрий Сальников (DmitriySalnikov)