Update util to 0.12.4

Chrome 92 started to disable `SharedArrayBuffer` without cross-origin isolation which can be enabled by [sending the page with special HTTP headers](https://web.dev/cross-origin-isolation-guide/). This change causes Chrome to emit a warning in DevTools console and [developers are confused with the message](vercel/next.js#21708). `util` is one of the libraries that uses `SharedArrayBuffer` and is causing the warning to appear in the console.

Luckily, the issue in `util` has been resolved in v0.12.4 and I would like to propose applying the fixed version to this library.

package.json

@@ -40,6 +40,6 @@
     "es6-object-assign": "^1.1.0",
     "is-nan": "^1.2.1",
     "object-is": "^1.0.1",
-    "util": "^0.12.0"
+    "util": "^0.12.4"
   }
 }