support http2

[bjohansebas]

This is the beginning of a draft to support HTTP2 in compression. The approach for testing is based on how it was done in finalhandler (https://github.com/pillarjs/finalhandler/pull/53). There is still work to be done and time needed to achieve this. I just wanted to start this to pick it up in the future, or if someone is motivated, they can use this as a foundation to continue and complete it.

fixes: #122

[bjohansebas]

I see the only change should be to verify that the Transfer-Encoding header is not sent.

[socket-security[bot]]

Updated and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/[email protected] ➜ 7.0.0	Transitive: environment, eval, filesystem	+39	1.93 MB	titanism

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[bjohansebas]

Some of the logic inside this section might be changing, I'm still not sure how it would work without Node.js's compatibility layer.