src cannot be undefined?

In the pervious versions of this component the src property could be set to undefined which is handy in my case as I use this as a debug tool for seeing the internals of my React page. Could we add the undefined type to src? Or am I missing something on how to use this component correctly?

import ReactJson from '@microlink/react-json-view';
import { useEffect, useState } from 'react';

const Foo = () => {
  const [value, setValue] = useState<string>();

  useEffect(() => {
    setTimeout(() => {
      setValue('hi');
    }, 1000); // Simulate a delay
  }, []);

  return <ReactJson src={value} />;
};

export default Foo;

Thanks!

Start at the ReactJson component and locate the type declaration for its src prop, then trace how an undefined initial value is handled. Confirm the intended behavior with the supplied delayed useState example and ensure the component accepts the initial undefined value without breaking the later string update.