chore pip deps: update hepstats requirement from ~=0.5.0 to ~=0.6.0 (#229)
chore pip deps: update hepstats requirement from ~=0.5.0 to ~=0.6.0 (#229)

Updates the requirements on [hepstats](https://github.com/scikit-hep/hepstats) to permit the latest version.
- [Release notes](https://github.com/scikit-hep/hepstats/releases)
- [Changelog](https://github.com/scikit-hep/hepstats/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/scikit-hep/hepstats/compare/v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: hepstats
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
scikit-hep/scikit-hep