Request to upgrade Swagger UI to 5.1.0

[JohnNiang]

Swagger UI 5.1.0 was released a few hours ago. And the release brings support for OpenAPI 3.1.0 specification. Support for OpenAPI 3.1.0 has been introduced in fully backward compatible way.

Meanwhile, I noticed that Swagger UI 5.1.0 in webjars/swagger-ui has been released, please see webjars/swagger-ui#191 for more.

[uc4w6c]

Closed because merge is complete