Bump pytest-xdist from 3.0.2 to 3.1.0 in /tests

Bumps [pytest-xdist](https://github.com/pytest-dev/pytest-xdist) from 3.0.2 to 3.1.0.
- [Release notes](https://github.com/pytest-dev/pytest-xdist/releases)
- [Changelog](https://github.com/pytest-dev/pytest-xdist/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-xdist@v3.0.2...v3.1.0)

---
updated-dependencies:
- dependency-name: pytest-xdist
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

tests/requirements.txt

@@ -13,7 +13,7 @@ pytest-cov==4.0.0
 pytest-html==3.2.0
 pytest-rerunfailures==10.2
 pytest-timeout==2.1.0
-pytest-xdist==3.0.2
+pytest-xdist==3.1.0
 pytest==7.2.0
 py>=1.8.2
 redis==4.4.0