Multiple type options are not working as expected

[dancecoder]

in the documentation it is mentioned multiple type options are possible:

// Note that multiple type options can be provided in an array.
"validateType2": {
    "type": ["boolean", "string"]
},

It is very nice feature. However when i've tried to use it I've got type error:

{
  "name": "InvalidTypeError",
  "message": "Type [\"number\", \"string\"] is not a valid type"
}

Tested with package version 1.4.0