[gnome-shell] extensionUtils: Stop using Lang.copyProperties()

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 7521b9c4b2c1c11f2b7735b70017b496104bb24d
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Nov 13 23:54:56 2020 +0100

    extensionUtils: Stop using Lang.copyProperties()
    
    It is now deprecated, so use object destructuring instead.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1498

 js/misc/extensionUtils.js | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/js/misc/extensionUtils.js b/js/misc/extensionUtils.js
index 128fc07d0f..d9a5721cf5 100644
--- a/js/misc/extensionUtils.js
+++ b/js/misc/extensionUtils.js
@@ -9,7 +9,6 @@
 const { Gio, GLib } = imports.gi;
 
 const Gettext = imports.gettext;
-const Lang = imports.lang;
 
 const Config = imports.misc.config;
 
@@ -211,8 +210,7 @@ function isOutOfDate(extension) {
 }
 
 function serializeExtension(extension) {
-    let obj = {};
-    Lang.copyProperties(extension.metadata, obj);
+    let obj = { ...extension.metadata };
 
     SERIALIZED_PROPERTIES.forEach(prop => {
         obj[prop] = extension[prop];