Bump pytest from 5.3.4 to 5.3.5

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.3.4 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@5.3.4...5.3.5)

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

dev-requirements.txt

@@ -1,6 +1,6 @@
 flake8
 mock
-pytest==5.3.4
+pytest==5.3.5
 pytest-cache
 pytest-cov
 pytest-sugar