Upgrade dependencies in Django server example

Author: miguelgrinberg

examples/server/wsgi/django_socketio/README.md

@@ -9,8 +9,18 @@ You can run it with the Django development web server:
 python manage.py runserver
 ```
 
-When running in this mode, you will see a warning indicating that the WebSocket
-transport is not available, which is not supported by this web server.
+When running in this mode, you will get an error message:
 
-See the documentation for information on supported deployment methods that you
-can use to add support for WebSocket.
+    RuntimeError: Cannot obtain socket from WSGI environment.
+
+This is expected, and it happens because the Django web server does not support
+the WebSocket protocol. You can ignore the error, as the server will still work
+using long-polling.
+
+To run the application with WebSocket enabled, you can use the Gunicorn web
+server as follows:
+
+    gunicorn -b :8000 --threads 100 --access-logfile - django_socketio.wsgi:application
+
+See the documentation for information on other supported deployment methods
+that you can use to add support for WebSocket.

examples/server/wsgi/django_socketio/requirements.txt

@@ -1,7 +1,11 @@
-asgiref==3.5.2
+asgiref==3.6.0
 backports.zoneinfo==0.2.1
-bidict==0.22.0
-Django==4.1.9
-python-engineio==4.3.2
-python-socketio==5.6.0
+bidict==0.22.1
+Django==4.2.1
+gunicorn==20.1.0
+h11==0.14.0
+python-engineio==4.4.1
+python-socketio==5.8.0
+simple-websocket==0.10.0
 sqlparse==0.4.4
+wsproto==1.2.0