prototype of classes are wrong

it turns out a quirk of converting
```js
class Foo {}
```
to
```js
class Foo extends Object {}
```
is that `Object.getPrototypeOf(Foo) == Object` when it should be `Object.getPrototypeOf(Foo) == Function.prototype`.

this is easily fixable but I'm probably not going to since I don't maintain this repository any more. you'll probably want to fix this if you're forking this repo though