Bump uniffi from 0.28.0 to 0.29.3

Bumps [uniffi](https://github.com/mozilla/uniffi-rs) from 0.28.0 to 0.29.3.
- [Changelog](https://github.com/mozilla/uniffi-rs/blob/main/CHANGELOG.md)
- [Commits](mozilla/uniffi-rs@v0.28.0...v0.29.3)

---
updated-dependencies:
- dependency-name: uniffi
  dependency-version: 0.29.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]