使用v-decorator验证form中input为数字时，输入数字检验失败，提示错误信息。

[nianlun]

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

Version

1.4.10

Environment

ant-design-vue: 1.4.10 vue: 2.5.11

Reproduction link

https://www.antdv.com/components/form-cn/#components-form-demo-dynamic-rules

Steps to reproduce

使用v-decorator验证form中input为数字时，输入数字检验失败，提示错误信息。
<a-input v-decorator="['weightValue',{rules: [{ required: true,type:'number',message: '货重为必填项'}]}]" />

What is expected?

输入数字检验失败，提示错误信息

What is actually happening?

输入数字检验通过，输入除数字以外的字符检验失败，提示错误信息

[sendya]

请直接使用 input-number

[li-guojiang]

请直接使用 input-number
加前缀和后缀或前置/后置标签 input-number 支持吗？

[yf-hk]

建议可以直接提pull request

[github-actions]

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