Bump @firebase/util from 0.3.2 to 1.5.2 in /web-platform/functions

Bumps [@firebase/util](https://github.com/firebase/firebase-js-sdk/tree/HEAD/packages/util) from 0.3.2 to 1.5.2.
- [Release notes](https://github.com/firebase/firebase-js-sdk/releases)
- [Changelog](https://github.com/firebase/firebase-js-sdk/blob/master/packages/util/CHANGELOG.md)
- [Commits](https://github.com/firebase/firebase-js-sdk/commits/@firebase/[email protected]/packages/util)

---
updated-dependencies:
- dependency-name: "@firebase/util"
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>