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](pytest-dev/pytest@6.2.3...6.2.4)

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

dev-requirements.txt

@@ -1,5 +1,5 @@
 pytest==4.6.9;python_version<'3.0'
-pytest==6.2.3;python_version>='3.6'
+pytest==6.2.4;python_version>='3.6'
 twine==1.13.0;python_version<'3.0'
 twine==3.4.1;python_version>='3.6'
 wheel==0.36.2