Amend typing in SpriteList.draw signature

Author: pushfoo

arcade/sprite_list/sprite_list.py

@@ -1054,7 +1054,7 @@ def initialize(self):
         """
         self._init_deferred()
 
-    def draw(self, *, filter: Optional = None, pixelated: bool = None, blend_function: Optional = None):
+    def draw(self, *, filter: Optional = None, pixelated: bool = False, blend_function: Optional[int] = None):
         """
         Draw this SpriteList into the current OpenGL context.