iterator-helper/rename_mjs.js

Provide helpers that polyfill all methods defined in [iterator helpers proposal](https://github.com/tc39/proposal-iterator-helpers), both for `Iterator` and `AsyncIterator`, and even more.

const fs = require('fs').promises;

async function main() {
  for (const file of await fs.readdir('./dist-esm')) {
    const name = './dist-esm/' + file;
    if ((await fs.stat(name)).isDirectory()) {
      continue;
    }

    await fs.rename(name, './dist/' + file.replace('.js', '.mjs'));
  }
}

main();