UITextField's extension to support isSecureTextEntry with RxCocoa

Reactive+isSecureTextEntry.swift

import RxCocoa
import RxSwift

extension Reactive where Base: UITextField {
    
    var isSecureTextEntry: Binder<()> {
        return Binder(base, binding: { (textField, _) in
            textField.isSecureTextEntry = !textField.isSecureTextEntry
        })
    }
    
}

// use case:

/*
changePasswordVisibilityButton.rx.tap
            .bind(to: self.rx.isSecureTextEntry)
            .disposed(by: disposeBag)
*/