JSON Schema needs updates

[PatStLouis]

There are 2 updates I would like to add to the json schema file:

• remove the required credentialStatus.id property, as this field is not required in the BitstringStatusList specification.
• remove the proofChain property, as proof chains are represented in the proof property.

[msporny]

Yes, please make those changes. We really do need to bring the JSON Schema file up to date with the latest specification. If you find anything else wrong in the JSON Schema file, please let us know.