setValue with selector

[jaesoekjjang]

Hello, I think it would be more useful to use setValue() with selector so we can refer previous value.
What do you think?

  const setValue = <
    T extends FieldValues,
    U extends FieldPath<T> = FieldPath<T>
  >(
    key: U,
    value: PathValue<T, U> | ((prev: PathValue<T, U>) => PathValue<T, U>)
  ) => {
  //...
  };