make pep561 compliant

django-stubs/dispatch/dispatcher.pyi

@@ -0,0 +1,37 @@
+from django.db.models.base import Model
+from functools import partial
+from typing import (
+    Any,
+    Callable,
+    List,
+    Optional,
+    Tuple,
+    Type,
+    Union,
+)
+
+
+class Signal:
+    def __init__(self, providing_args: List[str] = ..., use_caching: bool = ...) -> None: ...
+    def _clear_dead_receivers(self) -> None: ...
+    def _live_receivers(self, sender: object) -> Union[List[partial], List[Callable], List[object]]: ...
+    def _remove_receiver(self, receiver: None = ...) -> None: ...
+    def connect(
+        self,
+        receiver: Callable,
+        sender: Any = ...,
+        weak: bool = ...,
+        dispatch_uid: Optional[str] = ...
+    ) -> None: ...
+    def disconnect(
+        self,
+        receiver: Optional[Callable] = ...,
+        sender: Any = ...,
+        dispatch_uid: Optional[str] = ...
+    ) -> bool: ...
+    def has_listeners(self, sender: object = ...) -> bool: ...
+    def send(
+        self,
+        sender: Type[Model],
+        **named
+    ) -> Union[List[Tuple[object, None]], List[Tuple[Callable, None]]]: ...