Fix lint issues

- Sort imports

prometheus_aioexporter/script.py

@@ -1,14 +1,12 @@
 """Run a web server providing a Prometheus metrics endpoint."""
 
 import argparse
+from collections.abc import Iterable
 import logging
 import ssl
-import sys
-from collections.abc import Iterable
 from ssl import SSLContext
-from typing import (
-    IO,
-)
+import sys
+from typing import IO
 
 from aiohttp.web import Application
 from prometheus_client import (

prometheus_aioexporter/web.py

@@ -7,7 +7,6 @@
 )
 from ssl import SSLContext
 from textwrap import dedent
-from typing import Optional
 
 from aiohttp.web import (
     Application,

tests/script_test.py

@@ -1,5 +1,5 @@
-import logging
 from io import StringIO
+import logging
 from ssl import SSLContext
 from unittest import mock