Generated response headers structure is invalid

[REDNBLACK]

Given piece of code:

implicit final val RedirectSwagger: MkSwagger[Complete[Redirect]] = MkSwagger.single[Complete[Redirect]](
    OpenApiOp(
      responses = OpenApiResponses(
        codes = Map(Found.intValue -> OpenApiResponse(
          description = "Редирект на страницу".some,
          headers = Map(Location.name -> SwaggerStringValue(pattern = """https:\/\/(?:.+)?""".some))
        ))
      )
    ),
    TreeMap.empty
  )

... generates invalid format:

  "302": {
    "description": "Редирект на страницу",
    "content": {},
    "headers": {
      "Location": {
        "pattern": "https:\\/\\/(?:.+)?",
        "type": "string"
      }
    }
  }

Correct example in spec:

"headers": {
    "X-Rate-Limit-Limit": {
      "description": "The number of allowed requests in the current period",
      "schema": {
        "type": "integer"
      }
    }
}

[REDNBLACK]

Fixed in #236