List under items in schema is not supported

[Bjwebb]

e.g.

    "position": {
      "title": "Position",
      "description": "A single position",
      "type": "array",
      "minItems": 2,
      "items": [
        {
          "type": "number"
        },
        {
          "type": "number"
        }
      ],
      "additionalItems": false
    },