Support Open API 3.1.0-RC

[grimen]

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

I have written API specs using latest versions of JSON Schema and since Open API < 3.1.0 are not 100% compatible with JSON Schema specifications, so now when I try use openapi: 3.1.0 it seems it is not supported.

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Version 3.1.0 is RC but if not too much work would be useful for API developers to be able to use RC versions of the Open API spec, but maybe too much to ask for.

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My option now is to use another editor that supports Open API 3.1 RC (Swagger) or give up on latest JSON Schema standard definitions.

Additional context
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[nijikokun]

Would love to have support for 3.1, as it stands Swagger UI and Swagger Client support 3.0x. Since our preview functionality relies on Swagger UI we will have to wait until these libraries support 3.1x

[grimen]

I see, that makes sense.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[wdawson]

Closing as a duplicate of: #3577