Changes to Add Handler

the request property handler became required

the request property handler/method became required

the request property handler/url became required

the request property name became required

the request property type became required

removed the enum value DELETE of the request property handler/method

removed the enum value GET of the request property handler/method

removed the enum value POST of the request property handler/method

removed the enum value PUT of the request property handler/method

removed the request property handler/headers/authorization

api operation id post_webhook_add_handler was added

added the media type application/json for the response with the status 200

added the media type application/json for the response with the status 400

added the media type application/json for the response with the status 401

added the non-success response with the status 403

added the non-success response with the status 429

added the non-success response with the status 500

the handler request property type changed from string to object

added the new optional request property handler/headers

added the new optional request property handler/method

added the new optional request property handler/url

endpoint added

api path removed without deprecation