Request for Mozilla Position on fetch streaming upload

• Specification Title: Fetch streaming upload
• Specification or proposal URL: https://fetch.spec.whatwg.org/
• Caniuse.com URL (optional): N/A
• Bugzilla URL (optional): N/A
• Mozillians who can provide input (optional): @annevk (whle he is leaving Mozilla), @ddragana

Other information

Discussions:

• Streaming upload whatwg/fetch#1438
• Request body streams should use chunked encoding whatwg/fetch#966
• Uploading a Request made from a ReadableStream body whatwg/fetch#425

TAG review:

• Fetch streaming upload w3ctag/design-reviews#754

Explainer:

• https://github.com/yutakahirano/fetch-with-streams/blob/master/streaming-upload.md