fix: 修复单独使用@tmagic/editor,报错无法运行的问题

packages/editor/src/index.ts

@@ -15,6 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import './utils/polyfills';
 
 import { App } from 'vue';
 

packages/editor/src/utils/polyfills.ts

@@ -0,0 +1,22 @@
+/*
+ * Tencent is pleased to support the open source community by making TMagicEditor available.
+ *
+ * Copyright (C) 2021 THL A29 Limited, a Tencent company.  All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// serialize-javascript 依赖的 randombytes 依赖全局的 global 对象，因此此处需添加 global polyfill
+if (typeof (window as any).global === 'undefined') {
+  (window as any).global = window;
+}