[REF] website_sale_comparison: adapt code after jQuery update

Part of task 1896658

Co-authored-by: Aaron Bohy <aab@odoo.com>
Co-authored-by: Christophe Matthieu <chm@odoo.com>
Co-authored-by: Mathieu Duckerts-Antoine <dam@odoo.com>
Co-authored-by: David Monjoie <dmo@odoo.com>
Co-authored-by: Martin Geubelle <mge@odoo.com>
Co-authored-by: svs-odoo <svs@odoo.com>
Co-authored-by: Vincent Schippefilt <vsc@odoo.com>

addons/website_sale_comparison/static/src/js/website_sale_comparison.js

@@ -95,14 +95,12 @@ var ProductComparison = publicWidget.Widget.extend(ProductConfiguratorMixin, {
                 }
             }
 
-            var productReady = this.selectOrCreateProduct(
+            this.selectOrCreateProduct(
                 $elem.closest('form'),
                 productId,
                 $elem.closest('form').find('.product_template_id').val(),
                 false
-            );
-
-            productReady.done(function (productId) {
+            ).then(function (productId) {
                 productId = parseInt(productId, 10);
 
                 if (!productId) {
@@ -247,7 +245,7 @@ publicWidget.registry.ProductComparison = publicWidget.Widget.extend({
     start: function () {
         var def = this._super.apply(this, arguments);
         this.productComparison = new ProductComparison(this);
-        return $.when(def, this.productComparison.appendTo(this.$el));
+        return Promise.all([def, this.productComparison.appendTo(this.$el)]);
     },
 
     //--------------------------------------------------------------------------