Update URLs.

index.html

@@ -4,7 +4,7 @@
     <meta http-equiv="content-type" content="text/html;charset=utf-8" />
     <link rel="stylesheet" type="text/css" href="style.css" />
     <script src="https://unpkg.com/fengari-web/dist/fengari-web.js"></script>
-    <script type="application/lua" src="index.lua"></script>
+    <script type="application/lua" src="index.lua?rev=1"></script>
     <style>
     body {
         background: #8CBAFA;

index.lua

@@ -18,7 +18,7 @@
 --
 
 -- Load the renderer
-dofile('renderer.lua')
+dofile('renderer.lua?rev=1')
 local formspec_escape = formspec_ast.formspec_escape
 
 -- Show the properties list