Unable to install on macos

[jwhendy]

Thinking there's a python version issue or something else awry. numpy is reported as not on my system, which causes the build to fail.

% pip install stl_tools
Collecting stl_tools
  Using cached stl_tools-0.3.0.tar.gz (105 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [20 lines of output]
      Traceback (most recent call last):
        File "/Users/a1/installed/build/py_venv/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
          main()
        File "/Users/a1/installed/build/py_venv/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/Users/a1/installed/build/py_venv/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 118, in get_requires_for_build_wheel
          return hook(config_settings)
                 ^^^^^^^^^^^^^^^^^^^^^
        File "/private/var/folders/dw/fdqgzgb15t76fshqvg6dzf580000gp/T/pip-build-env-a9pr5rs2/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 334, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/private/var/folders/dw/fdqgzgb15t76fshqvg6dzf580000gp/T/pip-build-env-a9pr5rs2/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 304, in _get_build_requires
          self.run_setup()
        File "/private/var/folders/dw/fdqgzgb15t76fshqvg6dzf580000gp/T/pip-build-env-a9pr5rs2/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 522, in run_setup
          super().run_setup(setup_script=setup_script)
        File "/private/var/folders/dw/fdqgzgb15t76fshqvg6dzf580000gp/T/pip-build-env-a9pr5rs2/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 320, in run_setup
          exec(code, locals())
        File "<string>", line 2, in <module>
      ModuleNotFoundError: No module named 'numpy'
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

But:

% pip install numpy
Requirement already satisfied: numpy in ./installed/build/py_venv/lib/python3.12/site-packages (1.26.4)

% python --version
Python 3.12.3

macOS Sonoma, 14.7.1

Thanks for any guidance. Not sure if this is related to this PR for Py3 compatibility?