Lexicon updates: new types, string formats

[pfrazee]

• Add the following types to Lexicon
  • bytes
    • In CBOR, uses the binary tag
    • In JSON, looks like {$type: 'bytes', value: string} with value using a base64 encoding
  • cid-internal-ref
    • In CBOR, uses the link tag
    • In JSON, looks like {$type: 'cid-internal-ref', value: string} with value using a base64 encoding
• Remove the datetime type
• Add the format modifier to strings
  • This should apply additional validation to strings
• Add the following string formats:
  • datetime
  • at-uri
  • did
  • cid
• Update all lexicons as follows:
  • Change any datetime type to a string with the datetime format
  • Add formats to any strings that might benefit from them

[bnewbold]

In the example for cid-internal-ref for JSON, do you mean {$type: 'cid-internal-ref', value: string}`? If not, it seems like it would not safely round-trip without schema between CBOR and JSON.

[pfrazee]

Yes, apologies

[dholms]

fixed #658