ajv should match \"then\" schema"

для случая:

        "allOf": [
            {
                "if": {
                    "properties": { "deliveryType": { "not": { "const": deliveryTypes.CITY.value } } }
                },
                "then": {
                    "properties": { "cities": { "type": "array", "minItems": 1, } } 
                },
            },
            {
                "if": {
                "properties": { "deliveryType": { "not": { "const": deliveryTypes.NO_DELIVERY.value } } }
                },
                "then": {
                    required: ["country"],
                },
            },
        ]