Bump pytest-mock from 3.1.1 to 3.2.0 (#1719)

Bumps [pytest-mock](https://github.com/pytest-dev/pytest-mock) from 3.1.1 to 3.2.0.
- [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@v3.1.1...v3.2.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tests/requirements.txt

@@ -8,6 +8,6 @@ pycodestyle==2.6.0
 pyflakes==2.2.0
 pytest==5.4.3
 pytest-cov==2.10.0
-pytest-mock==3.1.1
+pytest-mock==3.2.0
 pytest-sugar==0.9.4
 twine==3.2.0