Bump pytest from 5.3.2 to 5.3.5

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.3.2 to 5.3.5.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@5.3.2...5.3.5)

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

requirements-test.txt

@@ -1,5 +1,5 @@
 # test runs requirements (versions we'll be testing against) - automatically updated by requires.io
-pytest==5.3.2
+pytest==5.3.5
 pytest-xdist==1.31.0
 pytest-cov==2.8.1
 coverage==5.0.3 # pytest-cov