Using CalenderView from Xamarin.Forms.Labs

I am trying to use the CalenderView from the Xamarin.Forms.Labs library. I have been looking through the source to identify the bindable properties. and have found DisplayedMonth.. So I tried to bind to this property like so:

<controls:CalendarView DisplayedMonth="{Binding DisplayedMonth}"/>

But I get no property DisplayedMonth found.

I add that my Xamarin.Forms.Labs comes from nuget. I would have thought this would be in line with the source on github as a new release has just been issued.

The reason I ask this question anyway is because I cannot select a date past the end of june