requirements: Upgrade Python requirements.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

zerver/management/commands/runtornado.py

@@ -5,7 +5,6 @@ from contextlib import AsyncExitStack
 from typing import Any
 from urllib.parse import SplitResult
 
-import __main__
 from asgiref.sync import async_to_sync, sync_to_async
 from django.conf import settings
 from django.core.management.base import BaseCommand, CommandError, CommandParser
@@ -13,6 +12,8 @@ from tornado import autoreload
 from tornado.platform.asyncio import AsyncIOMainLoop
 from typing_extensions import override
 
+import __main__
+
 settings.RUNNING_INSIDE_TORNADO = True
 if settings.PRODUCTION:
     settings.SECURE_PROXY_SSL_HEADER = ("HTTP_X_FORWARDED_PROTO", "https")