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Link to vercel/vercel#10767 & vercel/vercel#10761

@martinez-hugo thanks for this! Can you explain a bit what's the issue?

Adding a test case can also clarifying what's happening here 🙂

This issue is linked to the upgrading of undici package and the replaces of undici.fetch by undici.request.
When we do that, like in @vercel/node-utils pkg, we have a type error as it :

error TS2345: Argument of type 'Readable' is not assignable to parameter of type 'ReadableStream<any>'.
    Type 'Readable' is missing the following properties from type 'ReadableStream<any>': locked, cancel, getReader, pipeThrough, and 2 more.

And this error refer to our invocation of toToReadable function with a type of our first argument as Readable and not ReadableStream

The toToReadable is expecting a web stream with getReader method:
https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/getReader

Tests are failing since Readable is extending from NodeJS.ReadableStream, which it isn't a web stream.