Spec and typescript missing request_response response object schema

[simontankersley]

Hi there, firstly thank you for such a great product.

I think I've found an issue. I see the resolution of this past issue was support for a retrieve type of "request_response". I think perhaps the openapi schema update to the responses and schema sections were overlooked. I also note that the return type of MockServerClient.retrieveRecordedRequestsAndResponses in the typescript client is Promise<Expectation[]> not something like Promise<RequestResponse[]> (and this could be related to the missing open api spec changes)