@objc tag for property thumbLabel

[RyuX51]

I'd be really great if you could add a @objc tag to the property thumbLabel in your repo so that user defined runtime attributes in Storyboard can be set.

/// The value label that represents the thumb button
@objc lazy var thumbLabel: StyledLabel = UIBuilder.defaultStyledLabel()

I have to add it on each pod install manually or else I'm getting a

[<SnappingStepper.SnappingStepper 0x112209860> valueForUndefinedKey:]: this class is not key value coding-compliant for the key thumbLabel.

Tthanks for your great framework. :)