Release v2023.3.18

What's Changed

• Split apart core.py by @matteius in #5616
• Add missing spaces to --keep-outdated deprecation text by @kurtmckee in #5619
• Require the actual 'beautifulsoup4' package, not the 'bs4' redirect. by @wenottingham in #5620
• Improve pipenv update and add pipenv upgrade command by @matteius in #5617
• Message for Pipfile.lock packages vulnerabilities check by @ryan-rozario in #5628
• Replace deprecated BadZipfile with BadZipFile by @hugovk in #5629
• Fix dev flag support in update/upgrade. by @matteius in #5625
• Bump vistir and requirementslib by @oz123 in #5635
• Doc revisions1 by @matteius in #5621

New Contributors

• @kurtmckee made their first contribution in #5619
• @wenottingham made their first contribution in #5620
• @ryan-rozario made their first contribution in #5628

Full Changelog: v2023.2.18...v2023.3.18