added atom confirmed notifier

dists/interfaces/CellFrame/Chain.pyi

@@ -54,6 +54,10 @@ class Chain(Protocol):
     def addAtomNotify(*args):
         pass
 
+    @staticmethod
+    def addAtomConfirmedNotify(*args):
+        pass
+
     @staticmethod
     def atomFindByHash(*args):
         pass