Tomislav Markovski

Converted projects to SDK style targeting netstandard2.1 Added some unit tests around converting ed25519 to curve25519 keys

Allows the use of Jwk key types in BbsBlsSignature2020, they were only possible in BbsBlsSignatureProof2020

Can the `Expander` implementations be made public?

4

The trait `Expander` in `ark_ff` and its Xmd and Xof implementations are currently private. We have a need to use the expanders directly for other implementations, like [hash_to_scalar](https://identity.foundation/bbs-signature/draft-irtf-cfrg-bbs-signatures.html#name-hash-to-scalar) (using both...

Adds a section in security and privacy considerations about enabling CORS for use with browser applications. Fixes #26