Nix: Bump QMK CLI dependency to 1.0.0; bump other Python deps

Update Python dependencies for nix-shell to the most recent releases:

 - dotty-dict: 1.3.0 -> no longer used
 - milc: 1.4.2 -> 1.6.2
 - pep8-naming: 0.11.1 -> 0.12.1
 - pygments: 2.9.0 -> 2.10.0
 - pyrsistent: 0.17.3 -> 0.18.0
 - pyusb: 1.1.1 -> 1.2.1
 - setuptools-scm: 6.0.1 -> no longer used
 - qmk: 0.1.0 -> 1.0.0
 - qmk-dotty-dict: not used -> 1.3.0.post1
 - yapf: 0.30.0 -> 0.31.0

Note to self: The command to update Python dependencies changed to:

    ( cd util/nix && nix run 'nixpkgs#poetry' -- update --lock )