Use setuptools.build_meta

[nanonyme]

This package is currently using deprecated way of using setuptools in absence of pyproject.toml. See https://setuptools.pypa.io/en/latest/userguide/pyproject_config.html how to integrate into the new system.

[asottile]

it isn't deprecated. the pep states that in absence of a build table that a setuptools default is used so we don't need to cargo cult this