Support for Wildcard HTTP Responses

[melloware]

Originally reported at Orval: anymaniax/orval#950

As per the OpenAPI specification, it is allowed with wildcard http response codes (like 2xx, 3xx). Orval does not seem to support this.

https://learn.openapis.org/specification/paths.html#the-responses-object

  /api/v1/users/me:
    get:
      tags:
      - user-resource
      summary: Fetch some metadata about the current logged in user
      operationId: getLoggedInUser
      responses:
        "2xx":
          description: Successful
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UserDto'
        "4xx":
          description: Errors
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorDto'

Fails with:

Swagger schema validation failed.
  #/paths/~1api~1users~1me/get/responses must NOT have additional properties


Error: Swagger schema validation failed.
  #/paths/~1api~1users~1me/get/responses must NOT have additional properties

    at o (https://apitools.dev/swagger-parser/online/js/bundle.min.js:1:95564)
    at https://apitools.dev/swagger-parser/online/js/bundle.min.js:29:45042

SyntaxError: Swagger schema validation failed.
  #/paths/~1api~1users~1me/get/responses must NOT have additional properties

    at Function.o [as syntax] (https://apitools.dev/swagger-parser/online/js/bundle.min.js:1:95564)
    at validateSchema (https://apitools.dev/swagger-parser/online/js/bundle.min.js:1:6322)
    at SwaggerParser.validate (https://apitools.dev/swagger-parser/online/js/bundle.min.js:1:3391)