Bump ssort from 0.12.1 to 0.12.4

Bumps [ssort](https://github.com/bwhmather/ssort) from 0.12.1 to 0.12.4.
- [Release notes](https://github.com/bwhmather/ssort/releases)
- [Commits](bwhmather/ssort@0.12.1...0.12.4)

---
updated-dependencies:
- dependency-name: ssort
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]