create-react-app + forgJS

Hi there, I'm trying to use forgJS with create-react-app but unfortunately it raise the error:

1!] Error: 'Rule' is not exported by node_modules/@cesium133/forgjs/index.js

this is how I used:

import * as React from 'react';
import { Rule } from '@cesium133/forgjs';
import styles from './styles.css';

const ExampleComponent = ({ text }: any) => {
  const floatRule = new Rule(
    {
      type: 'float',
      min: 100,
    },
    null
  );
  const result = floatRule.test(200.3);
  console.log(result);

  return <div className={styles.test}>Example Component: {text}</div>;
};

export default ExampleComponent;

To have a working example is enough to do: npx create-react-library and then install the package forgJs.

Can someone help me on that please?