Made the entities optional when creating maps

dungeonbattle/interfaces.py

@@ -11,7 +11,7 @@ class Map:
     height: int
     tiles: list
 
-    def __init__(self, width: int, height: int, tiles: list, entities: list):
+    def __init__(self, width: int, height: int, tiles: list, entities = []: list):
         self.width = width
         self.height = height
         self.tiles = tiles