conditionally depend on importlib_resources #7116
Merged
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In Python >= 3.9,
importlib.resources
is available as part of the stdlib.This change makes it so that the backport is only installed for Python versions where it is actually needed and used.
Relevant docs: https://packaging.python.org/en/latest/specifications/dependency-specifiers/#environment-markers
Originally noticed here: cj81499/advent-of-code#330 (comment)