slstatus: add updateScript

pkgs/applications/misc/slstatus/default.nix

@@ -8,6 +8,8 @@
 , libXdmcp
 , conf ? null
 , patches ? [ ]
+# update script dependencies
+, gitUpdater
 }:
 
 stdenv.mkDerivation rec {
@@ -36,6 +38,8 @@ stdenv.mkDerivation rec {
 
   installFlags = [ "PREFIX=$(out)" ];
 
+  passthru.updateScript = gitUpdater {};
+
   meta = with lib; {
     homepage = "https://tools.suckless.org/slstatus/";
     description = "status monitor for window managers that use WM_NAME like dwm";