Cannot inherit from PinCodeTextField

[alexruden]

Want to create my class, based on your:

class MYPinCodeTextField: PinCodeTextField {
}

But got error Cannot inherit from non-open class 'PinCodeTextField' outside of its defining module

As I understood, you need to declare as open class instead public @IBDesignable public class PinCodeTextField: UIView -> @IBDesignable open class PinCodeTextField: UIView

Thank you!

[tkach]

Sure, could you please open the PR with this changes? I'm a little bit busy so can't do this in the nearest future