Update test_cue.py

Author: giosali

tests/test_cue.py

@@ -8,7 +8,10 @@
 import sys
 from abc import ABCMeta
 from collections import deque
-from dataclasses import dataclass
+try:
+    from dataclasses import dataclass
+except ModuleNotFoundError:
+    pass
 
 import pytest