3.0.0-RC3

Update README.md

3.0.0-RC2: Merge pull request #19 from upyun/sabakugaara-patch-1

fix issue18

3.0.0-RC1: Merge pull request #16 from upyun/feature/v3

Feature/v3

2.2.1: Merge pull request #15 from phy25/patch-1

修复获取目录使用量失败

2.2.0

• 支持 composer 安装
• 去除兼容 API: rmDir deleteFile readDir getWritedFileInfo
• 感谢 @totoleo

2.0.0

modify README.md