add isort fixes

Author: adelevie

openapi_python_client/__init__.py

@@ -1,8 +1,8 @@
 """ Generate modern Python clients from OpenAPI """
 
-import os
 import json
 import mimetypes
+import os
 import shutil
 import subprocess
 import sys

openapi_python_client/cli.py

@@ -1,7 +1,7 @@
 import codecs
 import pathlib
 from pprint import pformat
-from typing import Optional, List, Sequence
+from typing import List, Optional, Sequence
 
 import typer