qiniu-js@4.0.0-beta.2

What's Changed

• 新增 key 参数，更明确指定上传文件名 by @yinxulai in #663
• 调整 common 依赖方式 by @yinxulai in #665
• 请求统一使用小写 protocol by @yinxulai in #666

Full Changelog: https://github.com/qiniu/js-sdk/compare/qiniu-js@4.0.0-beta.1...qiniu-js@4.0.0-beta.2