asyncio: use loop.create_future() instead of asyncio.Future()

from https://docs.python.org/3.10/library/asyncio-future.html#asyncio.Future :
> the recommended way to create a Future object is to call loop.create_future().
> This way alternative event loop implementations can inject their own optimized implementations of a Future object.

electrum/interface.py

@@ -363,7 +363,7 @@ class Interface(Logger):
     LOGGING_SHORTCUT = 'i'
 
     def __init__(self, *, network: 'Network', server: ServerAddr, proxy: Optional[dict]):
-        self.ready = asyncio.Future()
+        self.ready = network.asyncio_loop.create_future()
         self.got_disconnected = asyncio.Event()
         self.server = server
         Logger.__init__(self)