chore(deps-dev): bump pytest from 6.2.1 to 6.2.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.2.1 to 6.2.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@6.2.1...6.2.2)

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

Author: dependabot-preview[bot]

dev-requirements.txt

@@ -3,7 +3,7 @@ coverage==5.3.1
 coveralls==1.7.0;python_version<'3.0'
 coveralls==2.2.0;python_version>='3.6'
 pytest==4.6.9;python_version<'3.0'
-pytest==6.2.1;python_version>='3.6'
+pytest==6.2.2;python_version>='3.6'
 pytest-cov==2.10.1
 Sphinx==1.8.5;python_version<'3.0'
 Sphinx==3.4.3;python_version>='3.6'