Update Hapticable.swift

[Kirow]

'cannot assign to property' fix

Checklist

• I've tested my changes.
• I've read the Contribution Guidelines.
• I've updated the documentation if necessary.

Motivation and Context

this change will solve cannot assign to property: 'self' is immutable error for cases when trying to assign property inside subclass c-tor

Sample code:

class MyButtonSubclass: UIButton {
    override init(frame: CGRect) {
        super.init(frame: frame)
        isHaptic = true
        hapticType = .impact(.heavy)
    }
}

[efremidze]

Thanks!!!!!