表单组件设置值时，遇到null时报错

[904534675]

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

Version

1.0.3

Environment

1.0.3

Reproduction link

Steps to reproduce

后台返回的数据在form中没有对应的item的情况，如下：
formdata:{'name':'zhangsan','age':17,'guid':null}
（后台返回的数据比较多，有些项目不需要展示出来）
这时表单中没有GUID这一项，用这个数据调用 setFieldsValue 时报错
错误信息： Cannot convert undefined or null to object"

What is expected?

麻烦处理一下null值，按空值处理

What is actually happening?

报错，form不能正常显示出来数据

[tangjinzhou]

麻烦给出复现链接

[904534675]

复现链接：https://codesandbox.io/s/jlp6yz8nj5

[tangjinzhou]

please update to 1.1.0

[lock]

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