Support for dictionaries in response/request body

Now we can use dictionaries in request/response body. For example:

let openAPIBuilder = OpenAPIBuilder(
    title: "Swiftgger OpenAPI document",
    version: "1.0.0",
    description: "OpenAPI documentation for test structure purposes",
    authorizations: [
        .basic(description: "Basic authorization"),
        .apiKey(description: "Api key authorization"),
        .jwt(description: "JWT authorization"),
        .oauth2(description: "OAuth authorization", flows: [
            .implicit(APIAuthorizationFlow(authorizationUrl: "https://oauth2.com", tokenUrl: "https://oauth2.com/token", scopes: [:]))
        ]),
        .openId(description: "OpenIdConnect authorization", openIdConnectUrl: "https//opeind.com")
    ]
)
.add([
    APIObject(object: Fuel(level: 90, type: "GAS", productionDate: Date(), parameters: ["power", "speed"])),
])
.add(APIController(name: "VehiclesController", description: "Contoller for vehicles", actions: [
    APIAction(method: .get,
              route: "/vehicles/tags",
              summary: "Get vehicle associated tags",
              description: "GET action for downloading vehicle associated tags.",
              responses: [
                APIResponse(code: "200", description: "Vehicle tags", type: .dictionary(String.self)),
                APIResponse(code: "401", description: "Unauthorized")
              ]
    ),
    APIAction(method: .get,
              route: "/vehicles/fuels",
              summary: "Get vehicle associated fuels",
              description: "GET action for downloading vehicle associated fuels.",
              responses: [
                APIResponse(code: "200", description: "Vehicle fuels", type: .dictionary(Fuel.self)),
                APIResponse(code: "401", description: "Unauthorized")
              ]
    )
]))

let openAPIDocument = openAPIBuilder.built()

Above code will produce response which in Swagger is displayed like on below image.