transports/noise: Use proto2

[mxinden]

Description

Update libp2p-noise to the latest specification change in https://github.com/libp2p/specs/pull/456.

See https://github.com/libp2p/specs/pull/456#pullrequestreview-1113439351 for a draft of a unit test to test compatibility. Might be helpful.

Motivation

See https://github.com/libp2p/specs/pull/456.

Are you planning to do it yourself in a pull request?

No

[mxinden]

See https://github.com/libp2p/go-libp2p/pull/1762 for the corresponding change on go-libp2p.

[nloadholtes]

Hi @mxinden I'm a Python dev who is looking at learning Rust. This is my first time really messing with a Rust project, so early apologies if I miss anything "obvious". :smile:

Also, I am new to libp2p (very interested in it, and trying to learn more about it). Any advice/feedback is welcomed. Thank you!

[drHuangMHT]

Should we close this issue because we are moving towards proto3? @thomaseizinger

[thomaseizinger]

I'll leave that for future maintainers to decide.

[jxs]

Since https://github.com/libp2p/specs/issues/465 was accepted and https://github.com/libp2p/rust-libp2p/pull/3007 was closed, I'd say it makes sense to also close this one right?