feat: add support for empty in_obj in update method

.pylintrc

@@ -0,0 +1,5 @@
+[FORMAT]
+max-line-length=88
+
+[MESSAGES CONTROL]
+disable=missing-docstring,too-few-public-methods,no-name-in-module,no-member,too-many-ancestors

fastapi_sqlalchemy_toolkit/model_manager.py

@@ -492,7 +492,7 @@ async def update(
         self,
         session: AsyncSession,
         db_obj: ModelType,
-        in_obj: UpdateSchemaType | ModelDict,
+        in_obj: UpdateSchemaType | ModelDict | None = None,
         refresh_attribute_names: Iterable[str] | None = None,
         commit: bool = True,
         **attrs: Any,
@@ -518,7 +518,9 @@ async def update(
 
         :returns: обновлённый экземпляр модели
         """
-        if isinstance(in_obj, dict):
+        if in_obj is None:
+            in_obj = {}
+        elif isinstance(in_obj, dict):
             update_data = in_obj
         else:
             update_data = in_obj.model_dump()

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "fastapi_sqlalchemy_toolkit"
-version = "0.4.1"
+version = "0.4.2"
 authors = [
   { name="Egor Kondrashov", email="[email protected]" },
 ]