graphicsmagick: 1.3.27 -> 1.3.28

pkgs/applications/graphics/graphicsmagick/default.nix

···
 , libjpeg, libpng, libtiff, libxml2, zlib, libtool, xz, libX11
 , libwebp, quantumdepth ? 8, fixDarwinDylibNames }:
 
-let version = "1.3.27"; in
+let version = "1.3.28"; in
 
 stdenv.mkDerivation {
   name = "graphicsmagick-${version}";
 
   src = fetchurl {
     url = "mirror://sourceforge/graphicsmagick/GraphicsMagick-${version}.tar.xz";
-    sha256 = "0rq35p3rml10cxz2z4s7xcfsilhhk19mmy094g3ivz0fg797hcnh";
+    sha256 = "0jlrrimrajcmwp7llivyj14qnzb1mpqd8vw95dl6zbx5m2lnhall";
   };
 
   patches = [