升级 jwt 版本, 支持 client 扩展 等

[timandy]

Description

1. 升级 jwt 版本到 5.0 修复安全漏洞
2. 初始化 sdk 时, 不请求 token, 懒加载
3. 支持自定义 client, 增强扩展性
4. 减少重复计算, 提升性能

Checklist

• the pull request title describes what this PR does (not a vague title like Update readme.md)
• the pull request targets the default branch of the repository (develop)
• the code follows the established code style of the repository, such as:
  • npm run prettier:check passes
  • npm run eslint:check passes
• tests are added for the changes I made (if any source code was modified)
• documentation added or updated
• I have run the project locally and verified that there are no errors