Bump pytest from 8.0.0 to 8.1.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.0.0 to 8.1.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.0.0...8.1.1)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

setup.py

@@ -65,7 +65,7 @@
             "tox==4.13.0 ; python_version>='3.8'",
             # Testing framework.
             "pytest==6.1.2 ; python_version<'3.8'",
-            "pytest==8.0.0 ; python_version>='3.8'",
+            "pytest==8.1.1 ; python_version>='3.8'",
             "pytest-cov==2.12.1 ; python_version<'3.8'",
             "pytest-cov==4.1.0 ; python_version>='3.8'",
             "pytest-mypy-plugins==1.9.3 ; python_version>='3.6' and python_version<'3.8'",