Update pytest requirement from <8.3,>=6.1 to >=6.1,<8.4

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@6.1.0...8.3.1)

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

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

setup.py

@@ -46,7 +46,7 @@ def read(*parts):
     'pytest-cov>=2.10,<5.1',
     'pytest-env==1.1.3',
     'pytest-mock>=3.11,<3.15',
-    'pytest>=6.1,<8.3',
+    'pytest>=6.1,<8.4',
     'pycodestyle>=2.6,<2.13'
 ]