libpackage.js

const fs = require('fs');
const path = require('path');
fs.writeFileSync(path.join(__dirname, 'lib', 'cjs', 'package.json'), `{
    "type": "commonjs"
}`);
fs.writeFileSync(path.join(__dirname, 'lib', 'mjs', 'package.json'), `{
    "type": "module"
}`);