[Objc] Problem sending bool value in delete request

Description

The problem occurs in the Obj-C version when I want to send a delete request that contains a boolean value. In the model I have a NSNumber* which can't be converted to false/true value and in the end I get a 400 as a response

Swagger-codegen version

Latest master

Swagger declaration file content or url

   delete:
     produces:
       - application/json
     description: Logout bookmaker. If all-sessions parameter is true, logs out for all user's sessions.
     parameters:
       - name: all-sessions
         in: query
         type: boolean
         required: false
       - name: bookieCode
         type: string
         description: Two letter bookmaker code.
         in: path
         required: true
     responses:
       204:
         description: Logged out successfully.
       410:
         description: Session token doesn't support feature.
     security:
       - UserSecurity: []
     tags:
       - Bookies management

Start by reproducing the Objective-C client generation with the Swagger declaration in the issue, focusing on the boolean all-sessions query parameter in the DELETE request. Trace how the NSNumber* value is serialized and verify that a true or false value produces the expected request instead of a 400 response.