Accept `Blob`s anywhere where a `Buffer` is currently accepted for writing

What is the problem this feature will solve?

Because Buffers aren't immutable, any time a Buffer is passed to something which will perform an asynchronous write, there is a concurrency hazard where the buffer could conceivably get modified before it gets a chance to be written. This can lead to bugs which are hard to track down. (I speak from experience.)

What is the feature you are proposing to solve the problem?

Anywhere where Buffer is currently accepted for a write operation, e.g. and perhaps most notably stream.Writable.write() and stream.Writable.end(), also make it acceptable to pass a Blob. Blobs are always immutable.

What alternatives have you considered?

Just keep using Buffers, mostly keep my fingers crossed, and sometimes make copies of Buffers as a safeguard.

(Note: It also makes sense to have a way to optionally have Blobs returned from readable streams, but I figure that'd be a different feature request.)

Comienza con los puntos de entrada Node.js stream.Writable.write() y stream.Writable.end(), y luego inspecciona otras APIs que actualmente aceptan Buffer para escrituras asíncronas. Determina el comportamiento requerido de Blob y actualiza la implementación, las pruebas y la documentación de la API relevantes para que las entradas Blob se acepten de forma coherente sin cambiar el comportamiento de retorno de readable-stream.