[302] Parse first GroupSchema SchemaType before trying DataType

[JanC]

This PR changes the generation of composed types (oneOf, anyOf) to prefer the composed type instead of the object when both are present in the schema

See ticket for detailed description

https://github.com/yonaskolb/SwagGen/issues/302

[yonaskolb]

Thanks @JanC. Could you also add an example to the test spec here https://github.com/yonaskolb/SwagGen/blob/master/Specs/TestSpec/spec.yml and also a changelog entry

[JanC]

somehow the CI keeps on failing but I think it's unrelated to this PR.

@yonaskolb any idea why?

[yonaskolb]

Thanks @JanC! Yeah the CI is failing for a different reason, and I haven't had time to look into it. Not sure what's happening

[JanC]

thanks for merging 🙏