Bump testfixtures from 7.2.2 to 8.2.0

Bumps [testfixtures](https://github.com/Simplistix/testfixtures) from 7.2.2 to 8.2.0.
- [Changelog](https://github.com/simplistix/testfixtures/blob/master/CHANGELOG.rst)
- [Commits](simplistix/testfixtures@7.2.2...8.2.0)

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

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

test-requirements.txt

@@ -1,5 +1,5 @@
 factory-boy<3.4
-testfixtures==7.2.2
+testfixtures==8.2.0
 psycopg[binary]>=3.1
 mysqlclient<2.2.5
 django-test-without-migrations==0.6