build(deps-dev): update pytest requirement (#130)

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@7.4.4...9.0.0)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.0
  dependency-type: direct:development
...

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Co-authored-by: davidgrayston-paddle <david.grayston@paddle.com>

Author: dependabot[bot]

setup.py

@@ -25,7 +25,7 @@
     ],
     extras_require={
         "dev": [
-            "pytest>=7.4.4,<8.5.0",
+            "pytest>=7.4.4,<9.1.0",
             "pytest-cov>=4.1,<7.1",
             "requests-mock~=1.11.0",
             "setuptools>=69.0.3",