Used to manage serialization and deserialization of COSE public keys
instead of coset in order to be able to derive De/Serialize for types
that include COSE public keys as fields in CBOR messages.
coset is inadequate for the purpose because it uses a distinct
AsCborSerialize trait instead of the standard serde::{Serialize,
Deserialize} traits.
serde_derive does not currently support using integer values as map
keys. CTAP uses integer values for various CBOR map keys. In order to
properly serialize and deserialize types for the CTAP protocol, a forked
version of serde from a pull request that adds support for renaming
field keys as integer types is used.
Tracked in <https://github.com/serde-rs/serde/pull/2209>
Nick Zana