EdDSA support and MbedTLS.jl #36
Description
It is common for JWTs to use EdDSA (usually Ed25519), as specified in RFC8037.
Implementing EdDSA support in JWTs.jl is slightly nontrivial, because MbedTLS.jl does not support EdDSA signatures.
MbedTLS.jl seems to be unmaintained anyway, so one might look at switching to OpenSSL.jl. I was going to start doing this, but unfortunately, OpenSSL.jl also doesn't support EdDSA, and in fact doesn't seem to support signatures in general. But there is interest elsewhere in bringing signature support to OpenSSL.jl, and it doesn't look like it should be hard.