Bump pytest from 5.3.4 to 5.4.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.3.4 to 5.4.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@5.3.4...5.4.1)

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

requirements-dev.txt

@@ -1,5 +1,5 @@
 pre-commit==2.1.1
-pytest==5.3.4
+pytest==5.4.1
 pytest-asyncio==0.10.0
 sphinx==2.4.4
 sphinx_rtd_theme==0.4.3