Run CI (including cibuildwheel) against Python 3.12 (beta)

.github/workflows/test.yml

@@ -57,6 +57,12 @@ jobs:
             cc: gcc
             cxx: g++
             python-version: '3.8'
+          - os: ubuntu-22.04
+            cc: gcc
+            cxx: g++
+            # Python 3.12 is in beta at the time of release. Once released,
+            # remove this branch and upgrade all the 3.11 branches to 3.12.
+            python-version: '3.12.0-beta.4'
           # Disabled for now because numba/llvmlite (needed for tests)
           # doesn't have a pypy wheel, and it's not worth the effect to
           # install all the dependencies needed to make that work.

pyproject.toml

@@ -8,7 +8,7 @@ before-build = "manylinux/before_build.sh"
 manylinux-x86_64-image="manylinux2014"
 manylinux-i686-image="manylinux2014"
 manylinux-aarch64-image="manylinux2014"
-build = ["cp38-manylinux*", "cp39-manylinux*", "cp310-manylinux*", "cp311-manylinux*"]
+build = ["cp38-manylinux*", "cp39-manylinux*", "cp310-manylinux*", "cp311-manylinux*", "cp312-manylinux*"]
 
 [tool.cibuildwheel.linux]
 archs = ["x86_64"]