Generics example for 2.x does not compile

The example for generics in the documentation does not work:

```
class MyEventEmitter extends (EventEmitter as { new(): TypedEmitter }) {
// ...
}
```

Just gives `error TS2344: Type 'T' does not satisfy the constraint 'EventMap'.` on the `TypedEmitter` part...

TypeScript 4.5.5