chore(deps-dev): bump pytest from 6.2.2 to 6.2.3

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.2.2 to 6.2.3.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@6.2.2...6.2.3)

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

dev-requirements.txt

@@ -2,7 +2,7 @@ coverage==5.5
 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==6.2.2;python_version>='3.6'
+pytest==6.2.3;python_version>='3.6'
 pytest-cov==2.11.1
 Sphinx==1.8.5;python_version<'3.0'
 Sphinx==3.5.3;python_version>='3.6'