doc: Review the libpng history and update scripts/cmake/AUTHORS.md
diff --git a/scripts/cmake/AUTHORS.md b/scripts/cmake/AUTHORS.md
index fe423fe..641dde2 100644
--- a/scripts/cmake/AUTHORS.md
+++ b/scripts/cmake/AUTHORS.md
@@ -5,9 +5,12 @@
 -----------
 
  * Alex Gaynor
+ * Alexey Petruchik
  * Andreas Franek
+ * Andrew Hundt
  * B. Scott Michel
  * Benjamin Buch
+ * Bernd Kuhls
  * Cameron Cawley
  * Christian Ehrlicher
  * Christopher Sean Morrison
@@ -17,6 +20,7 @@
  * Cosmin Truta
  * Dan Rosser
  * David Callu
+ * Gianfranco Costamagna
  * Gleb Mazovetskiy
  * Glenn Randers-Pehrson
  * Gunther Nikl
@@ -26,6 +30,7 @@
  * Kyle Bentley
  * Martin Storsjö
  * Owen Rudge
+ * Philip Lowman
  * Roger Leigh
  * Roger Lowman
  * Sam Serrels