add Q object

django-stubs/db/models/__init__.pyi

@@ -14,3 +14,4 @@ from .deletion import (CASCADE as CASCADE,
                        SET_NULL as SET_NULL,
                        DO_NOTHING as DO_NOTHING)
 from .query import QuerySet as QuerySet
+from .query_utils import Q as Q

django-stubs/db/models/query_utils.pyi

@@ -1,2 +1,12 @@
 class RegisterLookupMixin:
     pass
+
+
+class Q(object):
+    def __init__(self, *args, **kwargs) -> None: ...
+
+    def __or__(self, other: Q) -> Q: ...
+
+    def __and__(self, other: Q) -> Q: ...
+
+    def __invert__(self) -> Q: ...