[issue43077] Update bundled pip to 21.0.1 and setuptools to 52.0.0

[Paul Moore]

Change by Paul Moore <p.f.moore at gmail.com>:


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pull_requests: +23203
pull_request: https://github.com/python/cpython/pull/24388

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43077>
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