No error when schema not found

[carole-lavillonniere]

When referencing a non existing schema (incorrect path), the validation is not failing, which is misleading:

{
"type": "object",
"properties": {
"game": {
"allOf": [
{"$ref": "wrong/path/to/schema.json"}
]
}
}
}

[hoxworth]

Thanks - this should be fixed in 2.1.9.