Maintenance release without user-facing changes.

### Commit Statistics

 - 3 commits contributed to the release.
 - 3 days passed between releases.
 - 0 commits where understood as [conventional](https://www.conventionalcommits.org).
 - 0 issues like '(#ID)' where seen in commit messages

### Commit Details

 * **Uncategorized**
    - Release git-attributes v0.3.3, git-ref v0.15.3, git-index v0.4.3, git-worktree v0.4.3, git-testtools v0.8.0 (baad4ce)
    - prepare changelogs prior to release of git-testtools (7668e38)
    - Release git-features v0.22.3, git-revision v0.4.4 (c2660e2)