Wait 5 seconds before attempting to RESUME during INVALIDATE_SESSION.

discord/gateway.py

@@ -337,6 +337,7 @@ class DiscordWebSocket(websockets.client.WebSocketClientProtocol):
 
         if op == self.INVALIDATE_SESSION:
             if data == True:
+                yield from asyncio.sleep(5.0, loop=self.loop)
                 yield from self.close()
                 raise ResumeWebSocket(self.shard_id)