pip install radvel fails with python 3.12

[murphyjm]

For fresh conda environment with python=3.12.5, get the following error:

`pip install radvel
Collecting radvel
Using cached radvel-1.4.11.tar.gz (6.8 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing metadata (pyproject.toml) ... done
Collecting cython>=0.23 (from radvel)
Using cached Cython-3.0.11-cp312-cp312-macosx_10_9_x86_64.whl.metadata (3.2 kB)
Collecting numpy==1.24.3 (from radvel)
Using cached numpy-1.24.3.tar.gz (10.9 MB)
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
╰─> [33 lines of output]
Traceback (most recent call last):
File "/Users/josephmurphy/anaconda3/envs/test/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in
main()
File "/Users/josephmurphy/anaconda3/envs/test/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/josephmurphy/anaconda3/envs/test/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 112, in get_requires_for_build_wheel
backend = _build_backend()
^^^^^^^^^^^^^^^^
File "/Users/josephmurphy/anaconda3/envs/test/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 77, in _build_backend
obj = import_module(mod_path)
^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/josephmurphy/anaconda3/envs/test/lib/python3.12/importlib/init.py", line 90, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 1387, in _gcd_import
File "", line 1360, in _find_and_load
File "", line 1310, in _find_and_load_unlocked
File "", line 488, in _call_with_frames_removed
File "", line 1387, in _gcd_import
File "", line 1360, in _find_and_load
File "", line 1331, in _find_and_load_unlocked
File "", line 935, in _load_unlocked
File "", line 995, in exec_module
File "", line 488, in _call_with_frames_removed
File "/private/var/folders/lj/4t6tbksd2n57mt64tv8vqjvr0000gn/T/pip-build-env-nq73c7t2/overlay/lib/python3.12/site-packages/setuptools/init.py", line 16, in
import setuptools.version
File "/private/var/folders/lj/4t6tbksd2n57mt64tv8vqjvr0000gn/T/pip-build-env-nq73c7t2/overlay/lib/python3.12/site-packages/setuptools/version.py", line 1, in
import pkg_resources
File "/private/var/folders/lj/4t6tbksd2n57mt64tv8vqjvr0000gn/T/pip-build-env-nq73c7t2/overlay/lib/python3.12/site-packages/pkg_resources/init.py", line 2172, in
register_finder(pkgutil.ImpImporter, find_on_path)
^^^^^^^^^^^^^^^^^^^
AttributeError: module 'pkgutil' has no attribute 'ImpImporter'. Did you mean: 'zipimporter'?
[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.`

Rolling back to python 3.11.9 resolves things.