`audioTrack` not in typescript type for `formats`, `lang` parameter ignored

Version `4.11.5"`

Also using
```
ytdl('https://www.youtube.com/watch?v=4FRYox-sPP8', {
filter: "audioonly",
quality: 'highestaudio'
})
```

does not give an english audio track (the docs say lang is default 'en', must not be for audio track).

Current workaround is to manually filter the info and pass that in to the function under the `format` property.