Invalid type for SelectEventArgs on DropDownBase Completed

The SelectEventArgs interface in drop-down-base.d.ts is incorrect for property itemData when used with auto complete, possibly with other controls.  When a valid item is selected from the auto complete control, the itemData object is the data item bound to the selected list item, not the FieldSettingsModel.  If there is not a valid selected item, the value is the FieldSettingsModel of the AutoComplete (which I can't think of a reasonable use case to need that information from a Select event...).  If you need to keep broadcasting the FieldSettingsModel when an invalid item is selected, the interface should be changed to include the data bound item, something like:

itemData: FieldSettingsModel | { [key: string]: Object; } | string | boolean | number;