Caolan form missing datetimelocal

npm install missing the chunk of code below:

```
var datetimeLocalWidget = input('datetime-local');
exports.datetimeLocal = function (options) {
var opt = options || {};
var w = datetimeLocalWidget(opt);
w.formatValue = function (value) {
if (!value) {
return null;
}

var date = is.date(value) ? value : new Date(value);

if (isNaN(date.getTime())) {
return null;
}

return date.toISOString().slice(0, 23);
};
return w;
};
```