Scheduled weekly dependency update for week 43

[pyup-bot]

Update gitpython from 3.0.3 to 3.0.4.

Changelog

3.0.4

=============================================

see the following for details:
https://github.com/gitpython-developers/gitpython/milestone/31?closed=1

Links

• PyPI: https://pypi.org/project/gitpython
• Changelog: https://pyup.io/changelogs/gitpython/
• Repo: https://github.com/gitpython-developers/GitPython
• Docs: https://pythonhosted.org/GitPython/

Update lazy-object-proxy from 1.4.2 to 1.4.3.

Changelog

1.4.3

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

* Added binary wheels for Python 3.8.
* Fixed license metadata.

Links

• PyPI: https://pypi.org/project/lazy-object-proxy
• Changelog: https://pyup.io/changelogs/lazy-object-proxy/
• Repo: https://github.com/ionelmc/python-lazy-object-proxy

Update virtualenv from 16.7.6 to 16.7.7.

Changelog

16.7.7

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

Bugfixes
^^^^^^^^

- * fix virtualenv creation when ``--no-pip`` argument used. (`1430 <https://github.com/pypa/virtualenv/issues/1430>`_)
- upgrade bundled pip from ``19.3`` to ``19.3.1`` (`1433 <https://github.com/pypa/virtualenv/issues/1433>`_)

Links

• PyPI: https://pypi.org/project/virtualenv
• Changelog: https://pyup.io/changelogs/virtualenv/
• Homepage: https://virtualenv.pypa.io/

[lukpueh]

Merging before appveyor returns... (this PR only updates dev-requirements.txt, which is not used in CI/CD)