createCachedData is not implemented

```js
const vm = require("vm");

let script = new vm.Script("console.log('hello world')", { produceCachedData: true });

console.log(script.createCachedData());
```

This fails because it's not implemented yet. We can run bytecode inside browser if this is implemented.

This is implemented here on node source, https://github.com/nodejs/node/blob/0e715dea84d67a24624516c730aa71ed04971727/src/node_contextify.cc#L787

Is it possible to implement this on vm-browserify?