Validate data against a schema

Changes for 0.574 - 2023-11-13T00:50:55Z

• better detection of schema locations, for use by Document subclasses
• fixed vocabulary ordering (from v0.567)
• properly handle "$dynamicRef", "$recursiveRef" and "$schema" referencing a boolean schema
• bundled metaschemas have been updated to their latest versions from json-schema.org