Add helper bool magic method for state validity

Reported in #102

litecord/gateway/state.py

@@ -94,5 +94,9 @@ class GatewayState:
 
         self.large: int = kwargs.get("large") or 50
 
+    def __bool__(self):
+        """Return if the given state is a valid state to be used."""
+        return self.ws is not None
+
     def __repr__(self):
         return f"GatewayState<seq={self.seq} shard={self.current_shard},{self.shard_count} uid={self.user_id}>"

litecord/pubsub/lazy_guild.py

@@ -593,10 +593,7 @@ class GuildMemberList:
         dispatched = []
 
         for state in states:
-            if state is None:
-                continue
-
-            if state.ws is None:
+            if not state:
                 continue
 
             await state.ws.dispatch("GUILD_MEMBER_LIST_UPDATE", payload)