v2 - lacks support for `dependentRequired` valdition keyword from JSON Schema Specification

[dawidszwajkowski]

Support for validation keywords from 2020-12 spec has been added here #1275 but I don't see any way to model dependentRequired which is a part of validation vocabulary.

[baywet]

Hi @dawidszwajkowski
Thank you for using OpenAPI.NET and for reaching out.

Is this something you'd like to submit a pull request for provided some guidance?