chore(deps): bump serialize-javascript and mocha in /js

Bumps [serialize-javascript](https://github.com/yahoo/serialize-javascript) to 7.1.1 and updates ancestor dependency [mocha](https://github.com/mochajs/mocha). These dependencies need to be updated together.


Updates `serialize-javascript` from 6.0.2 to 7.1.1
- [Release notes](https://github.com/yahoo/serialize-javascript/releases)
- [Commits](https://github.com/yahoo/serialize-javascript/compare/v6.0.2...v7.1.1)

Updates `mocha` from 11.7.5 to 12.0.0
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/main/CHANGELOG.md)
- [Commits](https://github.com/mochajs/mocha/compare/v11.7.5...v12.0.0)

---
updated-dependencies:
- dependency-name: serialize-javascript
  dependency-version: 7.1.1
  dependency-type: indirect
- dependency-name: mocha
  dependency-version: 12.0.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

js/package.json

@@ -15,7 +15,7 @@
     "jshint": "^2.13.6",
     "jsverify": "^0.8.3",
     "mime-types": "^3.0.2",
-    "mocha": "^11.7.5",
+    "mocha": "^12.0.0",
     "nyc": "^18.0.0"
   },
   "scripts": {