Update dependency pytest-timeout to v1.3.3 (#2821)

This PR contains the following updates:

| Package | Update | Change | References |
|---|---|---|---|
| pytest-timeout | patch | `==1.3.2` -> `==1.3.3` | [homepage](http://bitbucket.org/pytest-dev/pytest-timeout/) |

---

### Renovate configuration

:date: **Schedule**: At any time (no schedule defined).

:vertical_traffic_light: **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

:recycle: **Rebasing**: Whenever PR becomes conflicted, or if you modify the PR title to begin with "`rebase!`".

:no_bell: **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- renovate-rebase -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://renovatebot.com/gh/marketplace/renovate). View repository job log [here](https://renovatebot.com/dashboard#mesosphere/dcos-commons).

Author: renovate[bot]

frozen_requirements.txt

@@ -94,7 +94,7 @@ PyJWT==1.7.1
 pylint==2.1.1
 PyNaCl==1.3.0
 pytest==3.8.2
-pytest-timeout==1.3.2
+pytest-timeout==1.3.3
 python-dateutil==2.7.3
 pyxdg==0.26
 PyYAML==3.13