Bump pytest from 7.2.2 to 7.3.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 7.2.2 to 7.3.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@7.2.2...7.3.1)

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

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

requirements.txt

@@ -2,7 +2,7 @@ flask==2.2.3
 requests==2.28.2
 responses==0.23.1
 lxml==4.9.2
-pytest==7.2.2
+pytest==7.3.1
 pillow==9.5.0
 cssselect==1.2.0
 gunicorn==20.1.0