What's Changed
* feat: add sub progress-bars for histogram adding by zbilodea in https://github.com/scikit-hep/hepconvert/pull/76
* build(deps): bump the actions group with 1 update by dependabot in https://github.com/scikit-hep/hepconvert/pull/75
* fix: cannot input multiple files when using "add" or "merge-root" in the command line by zbilodea in https://github.com/scikit-hep/hepconvert/pull/80
**Full Changelog**: https://github.com/scikit-hep/hepconvert/compare/v1.3.2...v1.3.3