Does not work with builtin objects with internal slots (URL, Map, Set, etc)

For instance:

    traverse({ url: new URL("https://example.com") }).map(function () {
      if (this.node instanceof URL) {
        this.update(this.node.toString());
      }
    });

TypeError: Receiver must be an instance of class URL
 ❯ Object.<anonymous> src/log-sanitizer.spec.ts:57:31
     55|     traverse({ url: new URL("https://example.com") }).map(function () {
     56|       if (this.node instanceof URL) {
     57|         this.update(this.node.toString());
       |                               ^
     58|       }
     59|     });
 ❯ walker node_modules/traverse/index.js:169:16
 ❯ node_modules/traverse/index.js:190:17
 ❯ forEach node_modules/traverse/index.js:19:30
 ❯ walker node_modules/traverse/index.js:185:4
 ❯ walk node_modules/traverse/index.js:208:3
 ❯ Traverse.map node_modules/traverse/index.js:251:9