chore(deps): bump pytest from 5.2.1 to 5.4.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.2.1 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@5.2.1...5.4.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

requirements/tests.txt

@@ -2,6 +2,6 @@
 
 coverage==5.1
 dredd_hooks==0.2
-pytest==5.2.1
+pytest==5.4.1
 pytest-cov==2.8.1
 objproxies==0.9.4