Added datepicker prop for readonly

Author: William Coletto

Fable.Helpers.ReactToolbox.fs

@@ -321,6 +321,7 @@ type DatePickerProps =
     | OnChange of Function
     | OnEscKeyDown of Function
     | OnOverlayClick of Function
+    | Readonly of bool
     | Theme of DatePickerTheme
     | Value of U2<DateTime, string>
     interface IReactToolboxProp
@@ -991,4 +992,4 @@ type TooltipProps =
     | TooltipHideOnClick of bool
     interface IReactToolboxProp
 let Tooltip = importDefault<ComponentClass<IHTMLProp list>> "react-toolbox/lib/tooltip"
-let inline tooltip b c = Fable.Helpers.React.from Tooltip b c
+let inline tooltip b c = Fable.Helpers.React.from Tooltip b c