Add support for datepicker

[TABanniefung]

public struct DatePicker: Element {

public let id: String?
public let index: Int
public let parent: Element
public let type: XCUIElement.ElementType = .datePicker

/// Returns the number of wheels the picker contains.
public var numberOfWheels: Int { return underlyingXCUIElement.pickerWheels.count }

public init(id: String, index: Int = 0, parent: Element = App.shared) {
	self.id = id
	self.index = index
	self.parent = parent
}

public func wheel(_ index: Int) -> Wheel {
	return Wheel(index: index, picker: self)
}

}

public extension DatePicker {

struct Wheel: Element, ValueRepresentable, Adjustable {
	
	public let id: String? = nil
	public let index: Int
	public let parent: Element
	public let type: XCUIElement.ElementType = .pickerWheel
	public var value: String { return underlyingXCUIElement.value as? String ?? "" }
	
	public init(index: Int, picker: DatePicker) {
		self.index = index
		self.parent = picker
	}
	
	public func adjust(to newValue: String) {
		underlyingXCUIElement.adjust(toPickerWheelValue: newValue)
	}
	
}

}

[zacoid55]

Is this something that could be raised as a PR, @TABanniefung?

[TABanniefung]

@zacoid55 I have no permission 😰