libaccounts-glib: add update script

pkgs/development/libraries/libaccounts-glib/default.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitLab, meson, mesonEmulatorHook, ninja, glib, check, python3, vala, gtk-doc, glibcLocales
+{ lib, stdenv, fetchFromGitLab, gitUpdater, meson, mesonEmulatorHook, ninja, glib, check, python3, vala, gtk-doc, glibcLocales
 , libxml2, libxslt, pkg-config, sqlite, docbook_xsl, docbook_xml_dtd_43, gobject-introspection }:
 
 stdenv.mkDerivation rec {
@@ -50,6 +50,10 @@ stdenv.mkDerivation rec {
     "-Dpy-overrides-dir=${placeholder "py"}/${python3.sitePackages}/gi/overrides"
   ];
 
+  passthru.updateScript = gitUpdater {
+    rev = "VERSION_";
+  };
+
   meta = with lib; {
     description = "Library for managing accounts which can be used from GLib applications";
     homepage = "https://gitlab.com/accounts-sso/libaccounts-glib";