chore: bump pluggy from 0.13.1 to 1.0.0

Bumps [pluggy](https://github.com/pytest-dev/pluggy) from 0.13.1 to 1.0.0.
- [Release notes](https://github.com/pytest-dev/pluggy/releases)
- [Changelog](https://github.com/pytest-dev/pluggy/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pluggy@0.13.1...1.0.0)

---
updated-dependencies:
- dependency-name: pluggy
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements.txt

@@ -6,7 +6,7 @@ coveralls==3.2.0
 flake8==3.9.2
 mccabe==0.6.1
 more-itertools==8.8.0
-pluggy==0.13.1
+pluggy==1.0.0
 py==1.10.0
 pycodestyle==2.7.0
 pyflakes==2.3.1