Fix: client.handshake.get_packets returns a dict instead of a set.

minecraft/networking/packets/clientbound/handshake/__init__.py

@@ -1,6 +1,3 @@
 # Formerly known as state_handshake_clientbound.
 def get_packets(context):
-    packets = {
-
-    }
-    return packets
+    return set()