TypeError: Credential is not a constructor，请支持 ESM

new Credential 报错，new Credential.default 成功。

重现步骤：

运行 node main.js

// main.js
import Credential, { Config } from '@alicloud/credentials';

const config = new Config({
  type:               'access_key',       // credential type
  accessKeyId:        'accessKeyId',      // AccessKeyId of your account
  accessKeySecret:    'accessKeySecret',  // AccessKeySecret of your account
})

const cred = new Credential(config); // TypeError: Credential is not a constructor.
// const cred = new Credential.default(config); // 能正常运行

@alicoud/ 下的一些库都有同样的问题，比如 @alicloud/dysmsapi20170525:

import Dysmsapi20170525 from '@alicloud/dysmsapi20170525';

new Dysmsapi20170525(config) // 报 TypeError: Dysmsapi20170525 is not a constructor

相关问题 https://github.com/aliyun/credentials-nodejs/issues/139

Start with the ESM import and constructor call in main.js, comparing the failing default import with the working .default form. Review the related issue 139 for context. Done means the shown Credential and Dysmsapi20170525 constructor calls work under ESM without .default.