Bluishoul

Add support for `deprecated` keyword

1

json-schema-spec PR: https://github.com/json-schema-org/json-schema-spec/pull/737 json-schema doc: https://json-schema.org/draft/2019-09/json-schema-validation.html#rfc.section.9.3 Usage: ``` { "$schema": "http://json-schema.org/draft/2019-09/schema#", "title": "Example Schema", "type": "object", "properties": { "firstName": { "type": "string", "deprecated": true }, }, "additionalProperties": false, "required": [...