Update pytest requirement from <7.2,>=6.1 to >=6.1,<7.3

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...7.2.0)

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

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

setup.py

@@ -40,7 +40,7 @@ def read(*parts):
     'coverage>=5.3,<6.6',
     'pytest-cov>=2.10,<4.1',
     'pytest-env>=0.6,<0.9',
-    'pytest>=6.1,<7.2',
+    'pytest>=6.1,<7.3',
     'pycodestyle>=2.6,<2.10'
 ]