ACP2E-3504: fix static error

Author: alzota

dev/tests/js/jasmine/tests/app/code/Magento/ConfigurableProduct/adminhtml/js/variations/steps/bulk.test.js

@@ -15,6 +15,8 @@ define([
     'jquery/uppy-core',
     'mage/translate'
 ], function (Bulk, $) {
+    'use strict';
+
     describe('Magento_ConfigurableProduct/js/variations/steps/bulk', function () {
         let bulkInstance, config;