chore: bump @tsparticles/slim from 4.1.0 to 4.2.1

Bumps [@tsparticles/slim](https://github.com/tsparticles/tsparticles/tree/HEAD/bundles/slim) from 4.1.0 to 4.2.1.
- [Release notes](https://github.com/tsparticles/tsparticles/releases)
- [Changelog](https://github.com/tsparticles/tsparticles/blob/main/bundles/slim/CHANGELOG.md)
- [Commits](https://github.com/tsparticles/tsparticles/commits/v4.2.1/bundles/slim)

---
updated-dependencies:
- dependency-name: "@tsparticles/slim"
  dependency-version: 4.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]