Incompatible with Python 3.10

[pareeohnos]

daven reported a failure trying to start up on python 3.9

:\ktrade-main>flask db upgrade
Traceback (most recent call last):
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\Scripts\flask.exe\__main__.py", line 7, in <module>
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\cli.py", line 990, in main
    cli.main(args=sys.argv[1:])
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\cli.py", line 596, in main
    return super().main(*args, **kwargs)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\click\core.py", line 1053, in main
    rv = self.invoke(ctx)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\click\core.py", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\click\core.py", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\click\core.py", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\click\core.py", line 754, in invoke
    return __callback(*args, **kwargs)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\click\decorators.py", line 26, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\cli.py", line 439, in decorator
    with __ctx.ensure_object(ScriptInfo).load_app().app_context():
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\cli.py", line 406, in load_app
    app = locate_app(self, import_name, None, raise_if_not_found=False)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\flask\cli.py", line 256, in locate_app
    __import__(module_name)
  File "C:\ktrade-main\wsgi.py", line 4, in <module>
    from application import create_app, db, socketio
  File "C:\ktrade-main\application.py", line 9, in <module>
    from flask_socketio import SocketIO
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\flask_socketio\__init__.py", line 9, in <module>
    from socketio import socketio_manage  # noqa: F401
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\socketio\__init__.py", line 9, in <module>
    from .zmq_manager import ZmqManager
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\socketio\zmq_manager.py", line 5, in <module>
    import eventlet.green.zmq as zmq
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\eventlet\__init__.py", line 17, in <module>
    from eventlet import convenience
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\eventlet\convenience.py", line 7, in <module>
    from eventlet.green import socket
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\eventlet\green\socket.py", line 4, in <module>
    __import__('eventlet.green._socket_nodns')
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\eventlet\green\_socket_nodns.py", line 11, in <module>
    from eventlet import greenio
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\eventlet\greenio\__init__.py", line 3, in <module>
    from eventlet.greenio.base import *  # noqa
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\eventlet\greenio\base.py", line 32, in <module>
    socket_timeout = eventlet.timeout.wrap_is_timeout(socket.timeout)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python310\lib\site-packages\eventlet\timeout.py", line 166, in wrap_is_timeout
    base.is_timeout = property(lambda _: True)
TypeError: cannot set 'is_timeout' attribute of immutable type 'TimeoutError'

C:\ktrade-main>
C:\ktrade-main>python -V
Python 3.10.0