hope support BLAKE3

[dvorakchen]

I tried this NoiseParams: Noise_XX_25519_ChaChaPoly_BLAKE3, but not supporting

BLAKE3 is a stronger version of BLAKE2, hope support it in future :)

[mcginty]

@dvorakchen BLAKE3 isn't officially supported in the Noise specification, but I'm always open to adding unofficial feature-gated implementations.

[nazar-pc]

I'm also interested in BLAKE3 support. @mcginty will you have time to review the PR again? The changes look pretty straightforward and non-controversial.