Add a default ListenerBase.setup implementation.

Author: GraylinKim

sc2reader/listeners/utils.py

@@ -5,4 +5,7 @@ def __init__(self):
         self.logger = log_utils.get_logger(self.__class__)
 
     def accepts(self, event):
-        return true
+        return true
+
+    def setup(self, replay):
+        pass