Add back shop expiration when claims expire

src/main/java/com/alttd/playershops/shop/PlayerShop.java

@@ -141,6 +141,10 @@ public class PlayerShop {
         }
     }
 
+    public void expireSign() {
+        setSignLines(type.getShopTypeConfig().expiredSignLines);
+    }
+
     public void removeSignLines() {
         setSignLines(type.getShopTypeConfig().activeSignLines);
     }