Make sure py__iter__ has the right signature

jedi/inference/value/dynamic_arrays.py

@@ -188,14 +188,14 @@ class _Modification(ValueWrapper):
 
 
 class DictModification(_Modification):
-    def py__iter__(self):
-        for lazy_context in self._wrapped_value.py__iter__():
+    def py__iter__(self, contextualized_node=None):
+        for lazy_context in self._wrapped_value.py__iter__(contextualized_node):
             yield lazy_context
         yield self._contextualized_key
 
 
 class ListModification(_Modification):
-    def py__iter__(self):
-        for lazy_context in self._wrapped_value.py__iter__():
+    def py__iter__(self, contextualized_node=None):
+        for lazy_context in self._wrapped_value.py__iter__(contextualized_node):
             yield lazy_context
         yield LazyKnownValues(self._assigned_values)