Relicense from CC0 to MIT/Apache-2.0?

[repi]

Ran into that this crate is licensed under the not so common CC0 license, which Open Software Institute does not recommend, so I/we generally try to avoid it as well.

Would it be possible to re-license this crate under the standard Rust MIT OR Apache-2.0? Like all the other RustCrypto crates?

Looks like @newpavlov have been the only contributor to this crate so far which would make it easy to change.

[newpavlov]

The code in this crate is based on tiny-keccak, so the license got inherited from it. I guess there shouldn't be no problems in re-licensing it under MIT OR Apache-2.0.

[repi]

Thanks, that would be sweet!