seletectDate does not call didSelectDate

* `cocoapods`
* `iPhone 6s iOS 10.0`
* `Xcode 8.0`
* `FSCalenda 2.4.0`
* A brief bug description.
* At the start of the viewcontroller I would like to call `didSelectDate`, so I call `selectDate`, the problem is `didSelectDate` is not being triggered programmatically. 
