Initial Update

[pyup-bot]

This PR sets up pyup.io on this repo and updates all dependencies at once, in a single branch.

Subsequent pull requests will update one dependency at a time, each in their own branch. If you want to start with that right away, simply close this PR.

Update pytest-mock from 1.12.1 to 1.13.0.

Changelog

1.13.0

-------------------

* The object returned by ``mocker.spy`` now also tracks any side effect
of the spied method/function.

Links

• PyPI: https://pypi.org/project/pytest-mock
• Changelog: https://pyup.io/changelogs/pytest-mock/
• Repo: https://github.com/pytest-dev/pytest-mock/