Allow bool in update synchronize_session (#117)

Author: dbanty

sqlalchemy-stubs/orm/query.pyi

@@ -1,4 +1,4 @@
-from typing import Any, Optional
+from typing import Any, Optional, Union
 from . import interfaces
 from .base import InspectionAttr
 from ..sql.selectable import ForUpdateArg
@@ -81,8 +81,8 @@ class Query(object):
     def merge_result(self, iterator, load: bool = ...): ...
     def exists(self): ...
     def count(self): ...
-    def delete(self, synchronize_session: str = ...): ...
-    def update(self, values, synchronize_session: str = ..., update_args: Optional[Any] = ...): ...
+    def delete(self, synchronize_session: Union[bool, str] = ...): ...
+    def update(self, values, synchronize_session: Union[bool, str] = ..., update_args: Optional[Any] = ...): ...
 
 class LockmodeArg(ForUpdateArg):
     @classmethod