Bump virtualenv from 20.0.31 to 20.2.2

[dependabot]

Bumps virtualenv from 20.0.31 to 20.2.2.

Changelog

Sourced from virtualenv's changelog.

v20.2.2 (2020-12-07)

Bugfixes - 20.2.2

- Bump pip to ``20.3.1``, setuptools to ``51.0.0`` and wheel to ``0.36.1`` - by :user:`gaborbernat`. (`[#2029](https://github.com/pypa/virtualenv/issues/2029) <https://github.com/pypa/virtualenv/issues/2029>`_)
v20.2.1 (2020-11-23)
No significant changes.
v20.2.0 (2020-11-21)
Features - 20.2.0

• Optionally skip VCS ignore directive for entire virtualenv directory, using option :option:no-vcs-ignore, by default False. ([#2003](https://github.com/pypa/virtualenv/issues/2003) <https://github.com/pypa/virtualenv/issues/2003>_)

• Add --read-only-app-data option to allow for creation based on an existing app data cache which is non-writable. This may be useful (for example) to produce a docker image where the app-data is pre-populated.

  .. code-block:: dockerfile

  ENV \
      VIRTUALENV_OVERRIDE_APP_DATA=/opt/virtualenv/cache \
      VIRTUALENV_SYMLINK_APP_DATA=1
  RUN virtualenv venv && rm -rf venv
  ENV VIRTUALENV_READ_ONLY_APP_DATA=1
  USER nobody
  # this virtualenv has symlinks into the read-only app-data cache
  RUN virtualenv /tmp/venv
  

  Patch by :user:asottile. ([#2009](https://github.com/pypa/virtualenv/issues/2009) <https://github.com/pypa/virtualenv/issues/2009>_)

Bugfixes - 20.2.0

- Fix processing of the ``VIRTUALENV_PYTHON`` environment variable and make it
  multi-value as well (separated by comma) - by :user:`pneff`. (`[#1998](https://github.com/pypa/virtualenv/issues/1998) <https://github.com/pypa/virtualenv/issues/1998>`_)
v20.1.0 (2020-10-25)
Features - 20.1.0

• The python specification can now take one or more values, first found is used to create the virtual environment - by :user:gaborbernat. ([#1995](https://github.com/pypa/virtualenv/issues/1995) <https://github.com/pypa/virtualenv/issues/1995>_)

... (truncated)

Commits

• b4607d1 release 20.2.2
• 1556731 Upgrade wheels and pip (#2029)
• 13c5369 Remove high constraint for importlib-metadata (#2020)
• 6fab6a8 Merge pull request #2017 from pypa/release-20.2.0
• e6f7485 release 20.2.0
• af08309 Add --readonly-app-data option (#2009)
• ed7ceb5 conftest.py: Make coverage optional (#2008)
• 271dd73 Use environment files for adding to PATH on Github Action (#2016)
• 87877f8 Also skip xonsh tests on Python 3.10 (#2013)
• 25c45cf [pre-commit.ci] pre-commit autoupdate (#2011)
• Additional commits viewable in compare view

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[dependabot]

Superseded by #34.