Bump testfixtures from 7.2.0 to 7.2.2

Bumps [testfixtures](https://github.com/Simplistix/testfixtures) from 7.2.0 to 7.2.2.
- [Changelog](https://github.com/simplistix/testfixtures/blob/master/CHANGELOG.rst)
- [Commits](simplistix/testfixtures@7.2.0...7.2.2)

---
updated-dependencies:
- dependency-name: testfixtures
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

setup.py

@@ -46,7 +46,7 @@
             "coverage==7.3.2",
             "pytest<7.5",
             "pytest-cov==4.1.0",
-            "testfixtures==7.2.0",
+            "testfixtures==7.2.2",
             "tox==4.11.3",
             "flake8==6.1.0",
             "flake8-docstrings==1.7.0",