Support Python 3.12 (#390)

## Description

<!-- Provide a brief description of the PR's purpose here. -->

This PR tracks official support for Python 3.12 as 3.12 was just
released. We upgrade the test CI's Python version and add a tag in
setup.py. This PR took a while as we were waiting for Numba to support
Python 3.12 -- the latest release (0.59.0) supports Python 3.12.

## Status

- [x] I have read the guidelines in

[CONTRIBUTING.md](https://github.com/icaros-usc/pyribs/blob/master/CONTRIBUTING.md)
- [x] I have formatted my code using `yapf`
- [x] I have tested my code by running `pytest`
- [x] I have linted my code with `pylint`
- [x] I have added a one-line description of my change to the changelog
in
      `HISTORY.md`
- [x] This PR is ready to go

.github/workflows/testing.yml

@@ -39,7 +39,7 @@ jobs:
       max-parallel: 12 # All in parallel.
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.11"]
+        python-version: ["3.12"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4

HISTORY.md

@@ -4,6 +4,10 @@
 
 ### Changelog
 
+#### API
+
+- Support Python 3.12 ({pr}`390`)
+
 #### Bugs
 
 - Fix solution retrieval in lunar lander eval ({pr}`457`)

setup.py

@@ -93,6 +93,7 @@
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Topic :: Scientific/Engineering",
         "Topic :: Scientific/Engineering :: Mathematics",
         "Topic :: Scientific/Engineering :: Artificial Intelligence",