Switch to clap v4 for argument parsing

cargo outdated:

Name           Project  Compat  Latest  Kind    Platform
----           -------  ------  ------  ----    --------
clap           3.2.23   ---     4.0.23  Normal  ---
clap_complete  3.2.5    ---     4.0.5   Normal  ---

Changelog: https://github.com/clap-rs/clap/blob/master/CHANGELOG.md#400---2022-09-28

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