tox 4.0.9

on Python PyPI

What's Changed

• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #2689
• Add tox_on_install and tox_env_teardown plugin hooks by @gaborbernat in #2687
• Add PKG_CONFIG_PATH to default passenv by @gaborbernat in #2700

Full Changelog: 4.0.8...4.0.9