Use the IP address resolved by the transport

Hostname destination support fails because asyncio's DatagramTransport
internally resolves hostnames to IP addresses and expects any call to
sendto() to use that IP instead of the input hostname.

This commit recognizes that resolution may have happened and updates
self.ip and self.port to match the resolved address.

pywizlight/bulb.py

@@ -484,6 +484,12 @@ async def _ensure_connection(self) -> None:
         self.transport = cast(asyncio.DatagramTransport, transport_proto[0])
         self.protocol = cast(WizProtocol, transport_proto[1])
 
+        # The transport expects us to send to the same address we connected to here
+        ip, port = self.transport.get_extra_info("peername")
+        if (self.ip, self.port) != (ip, port):
+            _LOGGER.debug("Resolved %s:%s to %s:%s", self.ip, self.port, ip, port)
+            self.ip, self.port = ip, port
+
     def register(self) -> None:
         """Call register to keep alive push updates."""
         if self.push_running: