Update pluggy requirement from >=0.3.1 to >=1.6.0

Updates the requirements on [pluggy](https://github.com/pytest-dev/pluggy) to permit the latest version.
- [Changelog](https://github.com/pytest-dev/pluggy/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pluggy/compare/0.3.1...1.6.0)

---
updated-dependencies:
- dependency-name: pluggy
  dependency-version: 1.6.0
  dependency-type: direct:production
...

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