Add version to game_id.json

src/window.py

@@ -74,6 +74,9 @@ class CartridgesWindow(Adw.ApplicationWindow):
     details_view_game_cover = None
     sort_state = "a-z"
 
+    # The version of the game_id.json spec
+    spec_version = 2.0
+
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
 
@@ -111,6 +114,9 @@ class CartridgesWindow(Adw.ApplicationWindow):
                 ):
                     path.unlink(missing_ok=True)
 
+            elif game.get("version") > self.spec_version:
+                continue
+
             else:
                 Game(game).update()