OpenAPI 3.2.0 support

[tillig]

Is your feature request related to a problem? Please describe.

As we progress in adopting the latest OpenAPI standards, having the library continue to support the new standards is important.

OpenAPI Specification 3.2.0 was recently released. It'd be nice to see support added for these new features.

Describe the solution you'd like

An update to the library to include OAS 3.2.0 support.

Describe alternatives you've considered

• Writing my own library
• Finding a different library

[baywet]

Thank you for using the SDK and for reaching out.

I have implemented the changes with the help of @kilifu in my spare time, and the PR is up at #2529.

Currently working with the owning team to get this reviewed and merged.