cascader 中 value 添加支持 number 类型

[simdd]

• I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

问题描述：

cascader 组件中 value 只支持string，不支持 number

需求

支持 number 类型

相关代码：

https://github.com/ant-design/ant-design/blob/master/components/cascader/index.tsx#L60

如果是设计如此：

 请告诉一下我为什么设计成只支持 string，谢谢

What does the proposed API look like?

支持 number

[afc163]

Could you create a PR to imporove it?

[hengkx]

Let me deal with it. before the encounter also needs number to be converted into string is very difficult

[XianZhengquan]

@simdd 你这个标题改的是不是有歧义啊，只支持number类型，也就是其他类型都不支持了。

[simdd]

@simdd 你这个标题改的是不是有歧义啊，只支持number类型，也就是其他类型都不支持了。

修改啦

[afc163]

Thx! @Loogeek #24247