Add return type for __init__

discord/abc.py

@@ -300,7 +300,7 @@ class _Overwrites:
     ROLE = 0
     MEMBER = 1
 
-    def __init__(self, data: PermissionOverwritePayload):
+    def __init__(self, data: PermissionOverwritePayload) -> None:
         self.id: int = int(data['id'])
         self.allow: int = int(data.get('allow', 0))
         self.deny: int = int(data.get('deny', 0))