(Fixed) Node.js ESM issue

Prerequisites:

• Either add type: "module" flag in the application's package.json file.
• Or write the application's code in an .mjs file.

Then the following code won't work — none of the "named exports" would be found:

import {
  isPossiblePhoneNumber,
  isValidPhoneNumber
} from 'libphonenumber-js';

Reproduced on Node 14+.