Bibclean

Release to tag version 0.8.0 in `main` and to fix `pre-commit` autoupdate in downstream repository.

**Full Changelog**: https://github.com/mscheltienne/bibclean/compare/0.7.0...0.8.0

- Fix missing `packaging` dependency

**Full Changelog**: https://github.com/mscheltienne/bibclean/compare/0.7.0...0.7.1

- Improve exit code of the entry-points `bibclean` and `bibclean-check`
- Add support for pre-commit hooks
- Drop support for python 3.8 and add support for python 3.12

**Full Changelog**: https://github.com/mscheltienne/bibclean/compare/0.6.0...0.7.0

What's Changed
* Update utilities by mscheltienne in https://github.com/mscheltienne/bibclean/pull/6
* Bump actions/checkout from 3 to 4 by dependabot in https://github.com/mscheltienne/bibclean/pull/7
* Pin version of bibtexparser by mscheltienne in https://github.com/mscheltienne/bibclean/pull/8

**Full Changelog**: https://github.com/mscheltienne/bibclean/compare/0.5.0...0.6.0

What's Changed
* [ENH] Merge loaded configuration with default configuration by mscheltienne in https://github.com/mscheltienne/bibclean/pull/5


**Full Changelog**: https://github.com/mscheltienne/bibclean/compare/0.4.0...0.5.0

- Add support for configuration via TOML file, e.g. `pyproject.toml`
- Update the documentation with BibTex terminology, command-line entry-points and configuration
- Increase test coverage
- Fix exit-code returned by `bibclean-check` when a duplicate is found
- Separate the execution of `bibclean.check_bib_database` and `bibclean.clean_bib_database`