Create configuration for isort

radicale/app/__init__.py

@@ -28,6 +28,7 @@ import base64
 import datetime
 import io
 import logging
+import posixpath
 import pprint
 import random
 import time
@@ -52,8 +53,6 @@ from radicale.app.put import ApplicationPutMixin
 from radicale.app.report import ApplicationReportMixin
 from radicale.log import logger
 
-import posixpath  # isort:skip
-
 VERSION = pkg_resources.get_distribution("radicale").version