Update pytest requirement from <7,>=5.1 to >=5.1,<9

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@5.1.0...8.1.1)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

setup.py

@@ -22,7 +22,7 @@ def run(self):
 
 extras_require = {
     'test': [
-        'pytest>=5.1,<7',
+        'pytest>=5.1,<9',
         'pytest-django>=3.5,<4',
     ],
     'lint': [