Bump pytest-mock from 1.10.4 to 1.11.0

Bumps [pytest-mock](https://github.com/pytest-dev/pytest-mock) from 1.10.4 to 1.11.0.
- [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@1.10.4...v1.11.0)

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

requirements-dev.txt

@@ -11,5 +11,5 @@ mypy==0.720
 pytest==5.1.3
 pytest-asyncio==0.10.0
 pytest-cov==2.7.1
-pytest-mock==1.10.4
+pytest-mock==1.11.0
 pytest-random-order==1.0.4