Bump pytest from 3.6.3 to 7.1.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 3.6.3 to 7.1.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/3.6.3...7.1.2)

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

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

dev-requirements.txt

@@ -3,5 +3,5 @@ fakeredis==0.7.0
 flake8==4.0.1
 freezegun==0.3.15
 pytest-cov==2.5.1
-pytest==3.6.3
+pytest==7.1.2
 tox==3.1.2