- fix build error (#61)

* - fix build error

* Revert "- fix build error"

This reverts commit db77b94.

* - remove empty new lines added by atom

Author: AYastrebov

Source/RxViewModel.swift

@@ -25,7 +25,7 @@ open class RxViewModel: NSObject {
   var disposeBag = DisposeBag()
 
   /// Underlying variable that we'll listen to for changes
-  private dynamic var _active: Bool = false
+  @objc private dynamic var _active: Bool = false
 
   /// Public «active» variable
   @objc public dynamic var active: Bool {