[issue38086] Synchronize importlib.metadata with importlib_metadata 0.21

[Jason R. Coombs]

Change by Jason R. Coombs <jaraco at jaraco.com>:


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pull_requests: +15508
pull_request: https://github.com/python/cpython/pull/15861

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38086>
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