Upgrade rocrate-validator to latest version #240

Currently at 1.13.1.

• supports RO-Crate 1.3
• now has --packaging-mode which can be set to attached, detached , or auto . auto guesses the mode based on the input format (JSON file, folder, etc) https://rocrate-validator.readthedocs.io/en/latest/6_package_modes/
• now has opt-in diagnostic checks - disabled by default, enable with --include-diagnostic-checks. I recommend enabling these
  • These check for things that aren't strictly invalid JSON-LD or RO-Crate metadata, but might be mistakes. For example, the first check in this category catches where a crate has "property": "xref-uri" rather than "property": {"@id": "xref-uri"} - this is often a mistake but it is sometimes done deliberately

It's possible that the latest version may have compatibility issues with our five-safes-crate-0.4 profile, I have not thoroughly checked for this - if there are issues we'll also have to update our fork of the validator itself.