Engines missing in `package.json` and wrong version of Node.js supported listed in README

```diff
-This project requires Node.js >= 10.13
+This project requires Node.js >= 14.18.0
```

See <https://nodejs.org/api/modules.html#core-modules> as `formidable` latest version uses `node:fs` scoped package usage in `require/import` statements.