gdk-pixbuf: 2.40.0 → 2.42.0
gdk-pixbuf: 2.40.0 → 2.42.0

https://ftp.gnome.org/pub/GNOME/sources/gdk-pixbuf/2.42/gdk-pixbuf-2.42.0.news

xlib has been dropped, some build flags changed: https://mail.gnome.org/archives/distributor-list/2020-November/msg00000.html
Also corrected license.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs