chore: dependencies = setuptools for gyp --version on Python >= 3.12

[cclauss]

Fixes #259

On Python >= 3.12

% pipx run --no-cache --spec git+/~https://github.com/nodejs/gyp-next.git gyp --help was erroring with

ModuleNotFoundError: No module named 'packaging'

% pipx run --no-cache --spec git+/~https://github.com/nodejs/gyp-next.git gyp --version is still erroring with

ModuleNotFoundError: No module named 'pkg_resources'

gyp --help was fixed in gyp-next v0.18.0
gyp --version was not

Since both modules are included setuptools let's use that recommended fix.

---

Proof:
% pipx install gyp-next
% gyp --version # Fails!
% pipx inject gyp-next setuptools # This is the same action as this pull request.
% gyp --version # Works as expected.
% gyp --help # Works as expected.