Bump virtualenv from 20.0.31 to 20.0.33 in /.github/workflows

[cjolowicz]

Bumps virtualenv from 20.0.31 to 20.0.33.

Changelog

Sourced from virtualenv's changelog.

v20.0.33 (2020-10-04)

Bugfixes - 20.0.33

- Fix ``None`` type error in cygwin if POSIX path in dest - by :user:`danyeaw`. (`[#1962](https://github.com/pypa/virtualenv/issues/1962) <https://github.com/pypa/virtualenv/issues/1962>`_)
- Fix Python 3.4 incompatibilities (added back to the CI) - by :user:`gaborbernat`. (`[#1963](https://github.com/pypa/virtualenv/issues/1963) <https://github.com/pypa/virtualenv/issues/1963>`_)
v20.0.32 (2020-10-01)
Bugfixes - 20.0.32

• For activation scripts always use UNIX line endings (unless it's BATCH shell related) - by :user:saytosid. ([#1818](https://github.com/pypa/virtualenv/issues/1818) <https://github.com/pypa/virtualenv/issues/1818>_)
• Upgrade embedded pip to 20.2.1 and setuptools to 49.4.0 - by :user:gaborbernat. ([#1918](https://github.com/pypa/virtualenv/issues/1918) <https://github.com/pypa/virtualenv/issues/1918>_)
• Avoid spawning new windows when doing seed package upgrades in the background on Windows - by :user:gaborbernat. ([#1928](https://github.com/pypa/virtualenv/issues/1928) <https://github.com/pypa/virtualenv/issues/1928>_)
• Fix a bug that reading and writing on the same file may cause race on multiple processes. ([#1938](https://github.com/pypa/virtualenv/issues/1938) <https://github.com/pypa/virtualenv/issues/1938>_)
• Upgrade embedded setuptools to 50.2.0 and pip to 20.2.3 - by :user:gaborbernat. ([#1939](https://github.com/pypa/virtualenv/issues/1939) <https://github.com/pypa/virtualenv/issues/1939>_)
• Provide correct path for bash activator in cygwin or msys2 - by :user:danyeaw. ([#1940](https://github.com/pypa/virtualenv/issues/1940) <https://github.com/pypa/virtualenv/issues/1940>_)
• Relax importlib requirement to allow version`_)
• pth files were not processed on CPython2 if $PYTHONPATH was pointing to site-packages/ - by :user:navytux. ([#1959](https://github.com/pypa/virtualenv/issues/1959) <https://github.com/pypa/virtualenv/issues/1959>) ([#1960](https://github.com/pypa/virtualenv/issues/1960) <https://github.com/pypa/virtualenv/issues/1960>)

Commits

• 7fab067 release 20.0.33
• 06dba77 Restore python3.4 support (add it back to CI) (#1965)
• adcf327 Fix cygwin NoneType error if POSIX path in dest (#1964)
• 59277f0 Bump linters (#1966)
• 368f830 fix release
• 71e2d7a release 20.0.32
• 865af66 Process pth files even if $PYTHONPATH points to site-packages/ (#1960)
• 4bdf0f1 Updated importlib-metadata constraint (#1953)
• 292e3a7 Fine tune codecov flags (#1958)
• bf74cf4 Update Github Actions (#1957)
• Additional commits viewable in compare view

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