➕ Add isort and ruff as dev dependencies;

➖ remove `flake8` dependency (replaced by `ruff`);
change `lint.sh` script to use `isort`, `ruff`, and `black`

src/marshmallow_generic/_util.py

@@ -1,6 +1,5 @@
 from typing import Any, Generic, Optional, TypeVar, get_args, get_origin
 
-
 _T = TypeVar("_T")
 
 

src/marshmallow_generic/decorators.py

@@ -4,7 +4,6 @@ from typing_extensions import ParamSpec
 
 from marshmallow.decorators import post_load as _post_load
 
-
 _R = TypeVar("_R")
 _P = ParamSpec("_P")