Bump pkgroll from 2.5.1 to 2.6.0

Bumps [pkgroll](https://github.com/privatenumber/pkgroll) from 2.5.1 to 2.6.0.
- [Release notes](https://github.com/privatenumber/pkgroll/releases)
- [Commits](privatenumber/pkgroll@v2.5.1...v2.6.0)

---
updated-dependencies:
- dependency-name: pkgroll
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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