Type issue with listener parameters

I have an variable called "event" and it is type is `keyof Events`
```ts
// I have an variable called "event" and it's type is `keyof Events`
emitter.on(event, (...args) => {
// It says args is any[] but we know that it is parameter of any of Events
})
```

To fix this we can change type definitions.
Current type definition is:
```ts
on (event: E, listener: Events[E]): this
```
but if we change it with
```ts
on(event: E, listener: (...args: Parameters) => ReturnType): this
```
the problem gets solved, now TypeScript knows args is any of the Events