Support OpenApi v.3.2.0

[thaaddeus]

it would be great to have support for ndjson schema / itemSchema- https://bump.sh/blog/json-streaming-openapi-3-2/ :)

[brandonmcconnell]

Good news! We've added support for OpenAPI 3.2, which means defining schemas for streaming APIs (and much more) should now work as expected for any valid OpenAPI 3.2 specifications.

OpenAPI 3.2 is backwards compatible with 3.1, so the upgrade should be seamless if you're already running on OAS 3.1.

Give it a try and let us know if you run into any issues!