Change save version to be an integer.

gorge.js

@@ -991,7 +991,7 @@ function saveGame() {
   try {
     let storage = window.localStorage;
 
-    storage.setItem("save-version", "0.0.1");
+    storage.setItem("save-version", 1);
 
     storage.setItem("ownedUpgrades", JSON.stringify(ownedUpgrades));