Validate HTTP requests and responses against an OpenAPI v3.1 document

Changes for 0.047 - 2023-09-19T04:29:16Z

• strings are now treated as numbers without requiring the "type" keyword, and only from parameters, not message bodies, and only when no media type is provided
• new "recursive_get" method on JSON::Schema::Modern::Document::OpenAPI for fetching a specification at a json pointer and following any $refs