Bug fixes

• Icon
  • Update icon of cascader and select (#15264 by @SimonaliaChen)
  • Update icon (#15258 #15268 by @iamkun)

Optimization

• Chore
  • Update build script (#15267 by @ziyoung)
• Docs
  • Fix link underline color (#15265 by @iamkun)
• Other
  • Fix migrating config not compatible with camel case props and events (#15260 by @SimonaliaChen)

Bug 修复

• Icon
  • 更新 Select 与 Cascader 的 icon (#15264 by @SimonaliaChen)
  • 更新 icon (#15258 by @iamkun)

优化

• Chore
  • 更新构建脚本 (#15267 by @ziyoung)
• Docs
  • 修复 link 的样式 (#15265 by @iamkun)
• 其他
  • migrating 配置兼容驼峰名称 (#15260 by @SimonaliaChen)