Combine extensions for weak assignment and sink

Publisher+WeakAssign.swift

extension Publisher where Failure == Never {
    func weakAssign<T: AnyObject>(
        to keyPath: ReferenceWritableKeyPath<T, Output>, on object: T
    ) -> AnyCancellable {
        sink { [weak object] value in
            object?[keyPath: keyPath] = value
        }
    }
    
    func weakSink<T: AnyObject>(
        weaklyCaptured: T,
        receiveValue: @escaping (T, Self.Output) -> Void
    ) -> AnyCancellable {
        sink { [weak weaklyCaptured] output in
            guard let strongRef = weaklyCaptured else { return }
            receiveValue(strongRef, output)
        }
    }
}