Add blake3 hash and sharness tests

[jbouwman]

This PR registers the version of BLAKE3 hashing from https://github.com/lukechampine/blake3 which now seems to have vector optimization.

• Looks like an additional v1 version of cpuid is included -- concern?
• Sharness tests use the test data from the official Rust/C version at https://github.com/BLAKE3-team/BLAKE3

Closes #121

[lidel]

💭 what happens when domain is not renewed?

[lukechampine]

I expect I'll continue to own lukechampine.com until I die. After that (if people are still using my code), they can rehost the source somewhere else. (lukechampine.com/foo just redirects to my github.com/lukechampine/foo)

[Stebalien]

lukechampine/blake3#13

But the cpuid version doesn't really matter.

[lukechampine]

I've tagged v1.1.6 with cpuid v2 if you want to use that. 👍🏻

[Stebalien]

Thanks!