Update AUTHORS and DONORS list

New contributors added to AUTHORS:
@cart, @homer666, @KidRigger, @marxin, @swenner

Thanks to all contributors and donors for making Godot possible!

Updated .mailmap for a better output in `git shortlog -s -n -e --no-merges`.

[ci skip]

AUTHORS.md

@@ -25,16 +25,16 @@ name is available.
 
 ## Developers
 
-(in alphabetical order, with 10 commits or more excluding merges)
+(in alphabetical order, with over 10 commits excluding merges)
 
     Aaron Franke (aaronfranke)
     Alexander Holland (AlexHolly)
-    Alexey Velikiy (jonyrock)
     Alket Rexhepi (alketii)
     Andrea Catania (AndreaCatania)
     Andreas Haas (Hinsbart)
     Andrii Doroshenko (Xrayez)
     Andy Moss (MillionOstrich)
+    Anish Bhobe (KidRigger)
     Anton Yabchinskiy (a12n)
     Aren Villanueva (kurikaesu)
     Ariel Manzur (punto-)
@@ -46,6 +46,7 @@ name is available.
     Bojidar Marinov (bojidar-bg)
     bruvzg
     Carl Olsson (not-surt)
+    Carter Anderson (cart)
     Chris Bradfield (cbscribe)
     Clay John (clayjohn)
     Dana Olson (adolson)
@@ -61,13 +62,13 @@ name is available.
     Ferenc Arn (tagcup)
     Franklin Sobrinho (TheHX)
     Geequlim
-    Gen (dbsGen)
     George Marques (vnen)
     Gerrit Großkopf (Grosskopf)
     Gilles Roudiere (groud)
     Guilherme Felipe de C. G. da Silva (guilhermefelipecgs)
     Hein-Pieter van Braam (hpvb)
     Hiroshi Ogawa (hi-ogawa)
+    homer666
     Hubert Jarosz (Marqin)
     Hugo Locurcio (Calinou)
     Ian Bishop (ianb96)
@@ -76,7 +77,7 @@ name is available.
     Indah Sylvia (ISylvox)
     J08nY
     Jakub Grzesik (kubecz3k)
-    Jérôme GULLY (Nutriz)
+    Jérôme Gully (Nutriz)
     Joan Fons Sanchez (JFonS)
     Johan Manuel (29jm)
     Joshua Grams (JoshuaGrams)
@@ -95,6 +96,7 @@ name is available.
     Mario Schlack (hurikhan)
     Martin Capitanio (capnm)
     Martin Sjursen (binbitten)
+    Marxin Liška (marxin)
     marynate
     Masoud BH (masoudbh3)
     Matthias Hölzl (hoelzl)
@@ -124,6 +126,7 @@ name is available.
     Saniko (sanikoyes)
     SaracenOne
     sersoong
+    Simon Wenner (swenner)
     Theo Hallenius (TheoXD)
     Thomas Herzog (karroffel)
     Timo (toger5)