Issue on TypeScript `FieldInputProps` typings

about #606

## Description
`FieldInputProps` extends `AnyObject` cause `keyof` unexpected operation.

https://github.com/microsoft/TypeScript/issues/35600

## example
```ts
type KeyOfFieldInputProps = keyof FieldInputProps;
// type KeyOfFieldInputProps = 'string' | 'number';
```

in my opinion, extending `AnyObject` is unnecessary, cuz the type definition must be exactly.