- [x] 优化修改config的方式，直接使用pip自身命令来进行修改镜像，避免不同操作系统可能存在的差异.
- [x] 优化测速逻辑，提升测速速度
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English Version Description
- [x] Optimize the way of modifying config, directly use pip's own command to modify the image, to avoid possible differences between different operating systems
- [x] Optimize the logic of speed measurement, to improve the speed measurement speed
Full Changelog: https://github.com/caoergou/cnpip/compare/v1.1.0...v1.2.0