Add generic type to form values

[yesmeck]

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[中文版模板 / Chinese template]

🤔 This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Branch merge
• Other (about what?)

👻 What's the background?

interface User {
  age: number;
  name: string;
}

interface Props extends FormComponentProps {
  user: User;
}

const UserForm: React.SF<Props> = () => {
  const handleSubmit = () => {
    form.validateFields((errors, values) => {
      console.log(values.notExist); // <= values has any type, no error
    })
  }
  ...
}

💡 Solution

interface User {
  age: number;
  name: string;
}

interface Props extends FormComponentProps<User> {
  user: User;
}

const UserForm: React.SF<Props> = () => {
  const handleSubmit = () => {
    form.validateFields((errors, values) => {
      console.log(values.notExist); // <= values has type, error
    })
  }
  ...
}

📝 Changelog description

Describe changes from user side, and list all potential break changes or other risks.

1. English description

FormComponentProps added a generic type of form values.

2. Chinese description (optional)

FormComponentProps 新增 Form 值的范型

☑️ Self Check before Merge

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

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[codecov]

Codecov Report

Merging #15355 into master will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #15355      +/-   ##
==========================================
+ Coverage   94.11%   94.14%   +0.03%     
==========================================
  Files         250      250              
  Lines        6643     6643              
  Branches     1927     1941      +14     
==========================================
+ Hits         6252     6254       +2     
+ Misses        390      388       -2     
  Partials        1        1

Impacted Files	Coverage Δ
components/form/Form.tsx	88.88% <ø> (ø)	⬆️
components/upload/UploadList.tsx	96.33% <0%> (+1.83%)	⬆️

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