Add keyboardAppearnce property

[Kofktu]

Hello, I want to change the keyboard color because the app's theme is dark

open class AnimatedTextInput: UIControl {
    open var keyboardAppearance: UIKeyboardAppearance
}

public protocol TextInput {
    func changeKeyboardAppearance(with newKeyboardAppearance: UIKeyboardAppearance)
}

[Kofktu]

@victorBaro define a var keyboardApperance in the TextInput (instead of function)

And Because in both UITextField and UITextView keyboardAppearance property changed property name keyboardAppearance -> currentKeyboardApperance

public protocol TextInput {
    var currentKeyboardAppearance: UIKeyboardAppearance { get set }
}