Ingest BODS 0.4 data

[kd-ods]

• Upgrade requirements (match versions in data-standard, solve any issues)
• modify compile-to-json-schema to handle urns etc.
• data: add schema-0-4-0.json
• Update DataReader (count_statement_types etc.)
• Update SchemaBODS (default version, types methods)
• Update JSONSchemaValidator (switch Draft4/2020-12 base on schema version)

[kd-ods]

The BODS 0.4 datasets in the Examples directory may be useful for this. They won't throw any schema validation errors.

[kd-ods]

From Ed: Given that references in schema are now using urns, the first thing is to update compile-to-json-schema to handle urns, so that I can build the schema-0-4-0.json file.

[radix0000]

The schema-0-4-0.json file has been generated, but has involved hacking both compile-to-json-schema and jsonref (which we don't control). Will need to address this in some way at end of project, once we are sure result is correct.

See: https://github.com/orgs/openownership/projects/10?pane=issue&itemId=72842291