Bump pytest from 6.2.0 to 6.2.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.2.0 to 6.2.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@6.2.0...6.2.1)

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

requirements/testing.txt

@@ -7,7 +7,7 @@ flake8-isort==4.0.0
 pydocstyle==5.1.1
 pylint==2.6.0
 pylint-strict-informational==0.1
-pytest==6.2.0
+pytest==6.2.1
 pytest-cov==2.10.1
 pytest-timeout==1.4.2
 setuptools==51.0.0