Update to new bitarray API in the item code huffman decoding

d2warehouse/huffman.py

@@ -62,7 +62,7 @@ decode_tree = decodetree(code)
 
 
 def decode(bits: bitarray, n) -> tuple[str, int]:
-    text = "".join(itertools.islice(bits.iterdecode(decode_tree), n))
+    text = "".join(itertools.islice(bits.decode(decode_tree), n))
     length = len(encode(text))
     return text, length