build(deps-dev): bump pytest from 6.2.3 to 6.2.4

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.2.3 to 6.2.4.
- [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/6.2.3...6.2.4)

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

requirements-dev.txt

@@ -30,7 +30,7 @@ grip==4.5.2
 py2exe==0.10.4.0; sys_platform == 'win32'
 
 # Testing
-pytest==6.2.3
+pytest==6.2.4
 pytest-cov==2.11.1  # Pytest code coverage support
 coverage[toml]==5.5 # pytest-cov dep. This is here to ensure that it includes TOML support for pyproject.toml configs
 # For manipulating folder permissions and the like.