Hi there, I've noticed that the to_sec1_bytes method of p521::ecdsa::VerifyingKey seems to be missing, making it difficult to serialize it into other forms. It seems that there is a comment // TODO(tarcieri): use RFC6979 + upstream types from the ecdsa crate that suggests that it might simply be due to p521 not fully generalized like p256 and p384 have been.
Is there a workaround for producing the SEC1 bytes for a p521 VerifyingKey?
Thanks!