v2.8.0

[yamdan]

Changed

• BREAKING: Upgraded the underlying jsonld-proofs, resulting in changes to the encoding of keys, PPIDs, and proofs
  • Keys are now encoded in base58btc with multicodec instead of base64url
  • PPIDs are now represented as did:key instead of ppid:
  • Proof encodings are now optimized by the latest docknetwork/crypto libraries
• Synced and Updated @types/jsonld Definitions
• Upgraded npm dependencies
• Remove subject IDs from example person credentials