Add asset versioning for default build location using vite (#399)

When mix is not used for asset compilation, chances are high that vite is used instead.
That's why I think it makes sense to add the default location that vite builds to as a
fallback for when now mix-manifest is available

src/Middleware.php

@@ -36,6 +36,10 @@ public function version(Request $request)
             return md5_file($manifest);
         }
 
+        if (file_exists($manifest = public_path('build/manifest.json'))) {
+            return md5_file($manifest);
+        }
+
         return null;
     }