modify router.dart bool to void

lib/src/router.dart

@@ -38,7 +38,7 @@ class Router {
     return _routeTree.matchRoute(path);
   }
 
-  bool pop(BuildContext context) => Navigator.pop(context);
+  void pop(BuildContext context) => Navigator.pop(context);
 
   ///
   Future navigateTo(BuildContext context, String path,