fatal: JSON Reference "#definitions/vast_companion_type" cannot be resolved

[headiron]

Hello.

During run validator for audio type request, I faced above error and found that there is a bug on companion_type definition under audio.

	"audio": {
		"type": "object",
		"required": [ "mimes" ],
		"additionalProperties": false,

....
"companiontype": {
"type": "array",
"items": {
"$ref": "#definitions/vast_companion_type"
}
},
..,

As you see it , "/" is omitted between # & definitions.

Please put the "/" like below.

				"items": {
					"$ref": "#/definitions/vast_companion_type"
				}

I see the problem at openrtb-schema_bid-request_v2-4.json