Bump pytest-xdist from 2.4.0 to 2.5.0

Bumps [pytest-xdist](https://github.com/pytest-dev/pytest-xdist) from 2.4.0 to 2.5.0.
- [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@v2.4.0...v2.5.0)

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

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

test_requirements.txt

@@ -26,7 +26,7 @@ pytest-cov==3.0.0
 pytest-forked==1.3.0
 pytest-mock==3.6.1
 pytest-rerunfailures==10.2
-pytest-xdist==2.4.0
+pytest-xdist==2.5.0
 PyVISA==1.11.3
 PyVISA-sim==0.4.0
 PyYAML==6.0