Support for did:peer:4

[FabioPinheiro]

In order to participate in the DIDComm interop a thon we need support for did:peer:4

We need:

• a resolver in order to accept other DIDs.
  We can either:
  • integrate with the universal resolver
  • build in the dedicated resolver (Support for did:peer:4 FabioPinheiro/scala-did#320)
• a db to storage to keep the long/short form of the DIDs
• a new way to setup the DID that support did:peer:4

[FabioPinheiro]

This work was done apart for a Demo and presented on an online DIDComm interruptibility event but was never merged.