Bump pytest-mock from 3.1.0 to 3.2.0

Bumps [pytest-mock](https://github.com/pytest-dev/pytest-mock) from 3.1.0 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@v3.1.0...v3.2.0)

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

Author: dependabot[bot]

requirements.txt

@@ -30,7 +30,7 @@ xgboost==1.1.1
 # other
 pytest==5.4.1
 pytest-pep8==1.0.6
-pytest-mock==3.1.0
+pytest-mock==3.2.0
 codecov==2.0.22
 requests==2.23.0