Update virtualenv to 20.0.17

[pyup-bot]

This PR updates virtualenv from 20.0.13 to 20.0.17.

Changelog

20.0.16

~~~~~~~~~~~~~~~~~~
- Allow seed wheel files inside the :option:`extra-search-dir` folders that do not have ``Requires-Python``
metadata specified, these are considered compatible with all python versions - by :user:`gaborbernat`. (`1757 <https://github.com/pypa/virtualenv/issues/1757>`_)

20.0.15

~~~~~~~~~~~~~~~~~~
- Upgrade embedded setuptools to ``46.1.3`` from ``46.1.1`` - by :user:`gaborbernat`. (`1752 <https://github.com/pypa/virtualenv/issues/1752>`_)

20.0.14

~~~~~~~~~~~~~~~~~~
- Fix discovery of interpreter by name from ``PATH`` that does not match a spec format - by :user:`gaborbernat`. (`1746 <https://github.com/pypa/virtualenv/issues/1746>`_)

Links

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

[codecov-io]

Codecov Report

Merging #1108 into master will not change coverage by %.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1108   +/-   ##
=======================================
  Coverage   93.78%   93.78%           
=======================================
  Files          10       10           
  Lines         788      788           
=======================================
  Hits          739      739           
  Misses         49       49           

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[pyup-bot]

Closing this in favor of #1123