The README.md example does not work with node.js v14

[crguezl]

Thanks for the module. Looks interesting!

However, I can make it work.
When executing the provided example:

import raceIterator from './racing-for-await-of/index.js';

// See https://stackoverflow.com/questions/40920179/should-i-refrain-from-handling-promise-rejection-asynchronously
process.on('rejectionHandled', () => {});
process.on('unhandledRejection', error => {
  console.log('unhandledRejection');
});

const sleep = time => new Promise(resolve => setTimeout(resolve, time));

(async function () {
    const arr = [
        sleep(2000).then(() => 'a'),
        'x',
        sleep(1000).then(() => 'b'),
        'y',
        sleep(3000).then(() => 'c'),
        'z',
    ];

    for await (const item of raceIterator(arr)) {
        console.log(item);
    }
}());

It outputs:

➜  test-racing-for-await-of git:(master) ✗ node --version
v14.4.0
➜  test-racing-for-await-of git:(master) ✗ node hello-racing-for-await-of.js
unhandledRejection