add draw pile method

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "hanabi"
-version = "1.1.0"
+version = "1.1.1"
 description = "Hanabi interface"
 readme = "README.md"
 license = { file = "LICENSE" }

src/hanabi/hanab_game.py

@@ -264,6 +264,10 @@ class GameState:
     def deck_size(self):
         return self.instance.deck_size
 
+    @property
+    def draw_pile_size(self):
+        return self.deck_size - self.progress
+
     # Properties of GameState
 
     def is_over(self):