ocamlPackages.ppx_deriving_cmdliner: add update script

pkgs/development/ocaml-modules/ppx_deriving_cmdliner/default.nix

@@ -5,6 +5,7 @@
 , cmdliner
 , ppx_deriving
 , ppxlib
+, gitUpdater
 }:
 
 buildDunePackage rec {
@@ -32,6 +33,8 @@ buildDunePackage rec {
     alcotest
   ];
 
+  passthru.updateScript = gitUpdater { rev-prefix = "v"; };
+
   meta = with lib; {
     description = "Ppx_deriving plugin for generating command line interfaces from types for OCaml";
     inherit (src.meta) homepage;