Ref #54: Drop ctap-types fork & move to cosey crate (fork)

[AlfioEmanueleFresta]

Motivation

Makes progress on upstreaming dependency changes, so we can publish our crate.

Previous upstreaming request was declined, as COSE types were moved out of ctap-types, and into the standalone cosey crate (trussed-dev/ctap-types#15).

This PR adopts cosey for COSE types, and drops our ctap-types fork in favour of the published crate.

See #54.

Changes

• Remove ctap-type fork in favour of:
  • Fork of trussed-dev/cosey for ctap-type::cose (this is no longer part of ctap-types). This fork includes the Deserialize trait for PublicKey, needed in our library.
    • Add Deserialize trait to PublicKey trussed-dev/cosey#12
  • Crate of trussed-dev/ctap-types for existing non-COSE uses (eg. CredentialProtectionPolicy)
• Update ctap-types to the latest version
• Update serde-indexed to 0.1.1 as required by updated ctap-types (Cargo.toml)
• Remove #[serde(default)] annotation, as this is currently not supported and fails altogether with serde-indexed 0.1.1: Support for serde(default) trussed-dev/serde-indexed#10

Follow-up

Drop the fork once change is upstreamed: trussed-dev/cosey#12

[msirringhaus]

LGTM!