webkitgtk: 2.30.2 -> 2.30.3

Fixes processing of malicousliy crafted web content which could lead to
- CVE-2020-13584: arbitrary code execution due to a use after free issue
- CVE-2020-9983: code execution due to an out-of-bounds write issue

Advisory at https://webkitgtk.org/security/WSA-2020-0008.html

Fixes: CVE-2090-13584, CVE-2020-9983

pkgs/development/libraries/webkitgtk/default.nix

@@ -59,15 +59,15 @@ with stdenv.lib;
 
 stdenv.mkDerivation rec {
   pname = "webkitgtk";
-  version = "2.30.2";
+  version = "2.30.3";
 
   outputs = [ "out" "dev" ];
 
   separateDebugInfo = stdenv.isLinux;
 
   src = fetchurl {
     url = "https://webkitgtk.org/releases/${pname}-${version}.tar.xz";
-    sha256 = "0ak8slddg7gpk6m096xzkiqw9bfsrrizvqr815bw44665fyf0ry4";
+    sha256 = "0zsy3say94d9bhaan0l6mfr59z03a5x4kngyy8b2i20n77q19skd";
   };
 
   patches = optionals stdenv.isLinux [