No way to get "byob" reader

No way to get "byob" reader

```
new DecompressionStream("deflate").readable.getReader({ mode: "byob" });
```

Chrome (`139.0.7258.155`) on Windows gives error -
```
Cannot use a BYOB reader with a non-byte stream
```

Probably missing - https://developer.mozilla.org/docs/Web/API/ReadableStream/ReadableStream#type ?