Readable.fromWeb and Readable.toWeb do not seems to be properly implemented #482
Description
First, thank you for your amazing work on readable-stream!
Readable.fromWeb an Readable.toWeb are calling the newStreamReadableFromReadableStream and newReadableStreamFromStreamReadable functions on the webStreamsAdapters.
However webStreamsAdapters is only defined as an empty object leading to a failure.
The same problem seems to affect Writable and Duplex.
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