Vrf Audit

[alxiong]

Description

This PR fix issues raised in our self-audit on BLS implementations.

Major changes include:

• Add Zeroizing::new(ikm) internally
• Add warning and rustdoc examples to remind users to provide good RNG
• Add key_gen_v5 to allow generation of multiple keys using the same ikm
• Update Ciphersuite ID to conform with standard
• Add options to deserialize compressed, unchecked (skipping subgroup check) for Signature and PublicKey.

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against correct branch (main)
• Linked to GitHub issue with discussion and accepted design OR have an explanation in the PR that describes this work.
• Wrote unit tests
• Updated relevant documentation in the code
• Added a relevant changelog entry to the Pending section in CHANGELOG.md
• Re-reviewed Files changed in the GitHub PR explorer

[tessico]

If I'm not mistaken this will need to be upgraded anyway, since e.g. the deserialize method will have a new signature in 0.4.0.

[tessico]

https://github.com/arkworks-rs/algebra/blob/master/CHANGELOG.md

[alxiong]

oh yeah, that's exactly what I meant. CanonicalDeserialize have 4 combinations of (un)compressed + (un)check. which makes more sense.

[tessico]

The TODO doesn't hurt though, it was just FYI.