Bump pytest from 5.4.0 to 5.4.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.0 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@5.4.0...5.4.1)

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

requirements.txt

@@ -10,7 +10,7 @@ pluggy==0.13.1
 py==1.8.1
 pycodestyle==2.5.0
 pyflakes==2.1.1
-pytest==5.4.0
+pytest==5.4.1
 pytest-cov==2.8.1
 pytest-mock==2.0.0
 six==1.14.0