Add a parameter: UI.bind(self) { me, state in ... }

[beeth0ven]

Hi thanks for provide the simplest architecture for RxSwift with RxFeedback,
I've a small question, is it good to add a strongify self parameter like what UIBindingObserver dose.
This can avoid let label = self.label! :

//let label = self.label!
//let minus = self.minus!
//let plus = self.plus!

Observable.system(
    ...
    feedback:
        UI.bind(self) { me, state -> UI.Bindings<Event> in
            let subscriptions = [
                state.map(String.init).bind(to: me.label.rx.text)
            ]
            let events = [
                me.plus.rx.tap.map { Event.increment },
                me.minus.rx.tap.map { Event.decrement }
            ]
            return UI.Bindings(subscriptions: subscriptions, events: events)
        }
    )
    .subscribe()
    .disposed(by: disposeBag)

[kzaher]

Hi @beeth0ven ,

yeah, sure. Feel free to make a PR with another overload.