feature-support-c2pa-photo nor main follow the latest spec

[salt]

attempting to verify the authenticity with the provided URL (https://contentcredentials.org/verify) gives:

This asset was created with an older version of Content Credentials. You must use an older version of Verify to view its information.

I am open to implementing the new features and making a PR if somebody can link to a place that lists the changes between whatever version this repo is on (0.7 I think?) and the versions going up to whatever latest c2pa spec is (if said document exists), but from the actual drafts is a bit much since I have too little understanding to tell what is changed from the previous version by reading the spec of the new version