@vercel/blob never completes stream uploads

[johannes-scharlach]

I've created a minimal replication here.

const blob = await upload(fileName, stream, {
  access: "public",
  handleUploadUrl: "/api/test/upload",
  multipart: true,
  contentType: mimeType,
});

this Promise never resolves when stream is a ReadableStream.

The real use case I have is for streaming audio from the client for transcription purposes, so I've also added an example of that.

[johannes-scharlach]

Digging deeper, it seems that ReadableStream is not even supported as a fetch body in Firefox, so rather than fixing this bug, it might be more pragmatic to just remove the type from the interface and documentation.