Bump pytest-mock from 3.2.0 to 3.3.1

Bumps [pytest-mock](https://github.com/pytest-dev/pytest-mock) from 3.2.0 to 3.3.1.
- [Release notes](https://github.com/pytest-dev/pytest-mock/releases)
- [Changelog](https://github.com/pytest-dev/pytest-mock/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-mock@v3.2.0...v3.3.1)

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

Author: dependabot-preview[bot]

requirements.dev.txt

@@ -13,6 +13,6 @@ pymdown-extensions==8.0
 pytest==6.0.1
 pytest-console-scripts==0.2.0
 pytest-cov==2.10.1
-pytest-mock==3.2.0
+pytest-mock==3.3.1
 pytest-runner==5.2
 wdb==3.3.0