New feature motivation

I have an input that accepts Spanish nie and Spanish nif. Specifiying one of the formats is enough to pass validation.

New feature description

Have a new "metamethod" that allows for defining this kind of behavior

New feature implementation

Right now the format for rules "ands" all the rules as far as I know like

  rules: {
    // simple rule, converted to {required:true}
    name: "required",
    // compound rule
    email: {
      required: true,
      email: true
    }
  }

The email needs to pass required AND email methods.

A suggestion on how it could look like in the configuration:

  rules: {
    nifcif: {
      oneof: {
        nifES: true,
        nieES: true
      }
    }
  }

Maybe there is already a way to define this but I'm not aware of it.