Bump testfixtures from 8.3.0 to 10.0.0

Bumps [testfixtures](https://github.com/Simplistix/testfixtures) from 8.3.0 to 10.0.0.
- [Changelog](https://github.com/simplistix/testfixtures/blob/master/CHANGELOG.rst)
- [Commits](simplistix/testfixtures@8.3.0...10.0.0)

---
updated-dependencies:
- dependency-name: testfixtures
  dependency-version: 10.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

poetry.lock

@@ -37,7 +37,7 @@ cloudsnake = 'cloudsnake.__main__:main'
 [tool.poetry.group.test.dependencies]
 pytest-randomly = "^3.15.0"
 pytest = "^9.0.1"
-testfixtures = "^8.3.0"
+testfixtures = "^10.0.0"
 moto = "^5.0.9"
 pytest-cov = "^5.0.0"