Upgrade h2 and hyper versions to prevent exploit (#4339)

## Motivation

HTTP/2 implementations are vulnerable to "MadeYouReset" DoS attack
through HTTP/2 control frames. More information here:
https://www.kb.cert.org/vuls/id/767506
Some `h2` versions that we're indirectly using are vulnerable to that
attack.

## Proposal

Upgrading the necessary crates, so that they use `h2` versions that have
the vulnerability patched, as suggested in this article:
https://seanmonstar.com/blog/hyper-http2-didnt-madeyoureset/

## Test Plan

CI

## Release Plan

- Nothing to do / These changes follow the usual release cycle.

Author: ndr-ds