fix return type hints, these changed in 0.14.0

Author: brondsem

ming/odm/mapper.pyi

@@ -71,13 +71,12 @@ class Mapper(Generic[TMappedClass]):
 
 
 MongoFilter = dict
-ChangeResult = dict
 class _ClassQuery(Generic[TMappedClass]):
     # proxies most of these from Session
     def get(self, _id: Union[ObjectId|Any] = None, **kwargs) -> Optional[TMappedClass]: ...
     def find(self, filter: MongoFilter = None, *args, **kwargs) -> Cursor[TMappedClass]: ...
     def find_by(self, filter: MongoFilter = None, *args, **kwargs) -> Cursor[TMappedClass]: ...
-    def remove(self, spec_or_id: Union[MongoFilter, ObjectId] = None, **kwargs) -> ChangeResult: ...
+    def remove(self, spec_or_id: Union[MongoFilter, ObjectId] = None, **kwargs) -> pymongo.results.DeleteResult: ...
     def count(self) -> int: ...
     def find_one_and_update(self, filter: MongoFilter, update: dict, **kwargs) -> TMappedClass: ...
     def find_one_and_replace(self, filter: MongoFilter, replacement: dict, *args, **kwargs) -> TMappedClass: ...
@@ -89,16 +88,16 @@ class _InstQuery(object):
     # proxied from session:
     def update_if_not_modified(self, obj, fields, upsert=False) -> bool: ...
 
-    def delete(self) -> ChangeResult: ...
+    def delete(self) -> None: ...
 
 @type_check_only
 class Query(_ClassQuery[TMappedClass], _InstQuery):
 
     @overload  # from _ClassQuery
-    def update(self, spec: MongoFilter, fields: dict, **kwargs) -> ChangeResult: ...
+    def update(self, spec: MongoFilter, fields: dict, **kwargs) -> pymongo.results.UpdateResult: ...
 
     @overload  # from _InstQuery
-    def update(self, fields, **kwargs) -> ChangeResult: ...
+    def update(self, fields, **kwargs) -> pymongo.results.UpdateResult: ...
 
 
 def __getattr__(name) -> Any: ...  # marks file as incomplete