add tuple to base types

[phadej]

Something like:

typify.type("tuple", function (v) {
    if (!Array.isArray(v)) { return false; }
    var args = Array.prototype.slice.call(arguments, 1);
    if (args.length !== v.length) { return false; }
    for (var i = 0; i < args.length; i++) {
        if (!args[i](v[i])) return false;
    }
    return true;
});

typify.check("tuple string number", ["foo", 42]); // true