Return error when used validator is not registered

[ricco24]

Return suitable error message when used validator is not registered.

new Validation('json', 'status', 'required|enum:0,1,2')

Result:

{
  "error": "Bad input parameter",
  "errors": [
    "Validation for status(0) failed | enum:0,1,2"
  ]
}

Expected result:

{
  "error": "Bad input parameter",
  "errors": [
    "Validator enum not registered"
  ]
}

[ricco24]

Maybe bether throw exception?