Support top level $ref in combination with other declarations

[wol-soft]

Describe the bug

The provided schema creates an object containing only the properties from the $ref

Expected behavior
An object with all four properties (name, age, street and zip) should be generated.

Schema

{
  "definitions": {
    "location": {
      "type": "object",
      "properties": {
        "street": {
          "type": "string",
          "minLength": 2
        },
        "zip": {
          "type": "integer"
        }
      },
      "required": [
        "street"
      ]
    }
  },
  "$id": "Person",
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "The name of the person",
      "example": "Lawrence"
    },
    "age": {
      "type": "integer",
      "description": "The age of the person",
      "example": 42
    }
  },
  "$ref": "#/definitions/location",
  "required": [
    "name"
  ]
}