Recursive models are not supported

[Deadarius]

Atttempts to use JSON schemas with definitions that are referencing themselves leads to stack overflow and crash.

Steps to reproduce:

1. create a schema:

   {
   "$schema": "http://json-schema.org/draft-07/schema#",
   "definitions": {
   "folder": {
     "type": "object",
     "title": "Folder Schema",
     "properties": {
       "id": {
         "type": "string",
         "example": "3ba1c69c-3c81-4d6d-b304-873d898b2e3c",
         "format": "uuid"
       },
       "name": {
         "type": "string",
         "example": "Level 1"
       },
       "folders": {
         "type": "array",
         "items": {
           "$ref": "#/definitions/folder"
         }
       }
     },
     "additionalProperties": false,
     "required": ["id", "folders"]
   }
   },
   "type": "object",
   "title": "Folders Response Schema",
   "properties": {
   "data": {
     "$ref": "#/definitions/folder"
   }
   }
   }

2. reference schema in serverless documentation
3. run serverless openapi generate

Outcome: Error(maximum call stack size exceeded) Expected: openapi document is generated