Bump pytest-xdist from 3.3.1 to 3.5.0 (#354)

Bumps [pytest-xdist](https://github.com/pytest-dev/pytest-xdist) from 3.3.1 to 3.5.0.
- [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@v3.3.1...v3.5.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

dev-requirements.txt

@@ -7,6 +7,6 @@ pytest-asyncio==0.21.1
 pytest-cache==1.0
 pytest-cov==4.1.0
 pytest-mock==3.12.0
-pytest-xdist==3.3.1
+pytest-xdist==3.5.0
 therapist==2.2.0
 Unidecode==1.3.7