Add Python 3.12 support

- Include Python 3.12 classifier in PyPI package
- Build and publish PyPI package using Python 3.12
- Run tests with Python 3.12, in addition to 3.10-3.11

https://docs.python.org/3/whatsnew/3.12.html

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.10", "3.11"]
+        python-version: ["3.10", "3.11", "3.12"]
     env:
       HATCH_ENV: "ci"
       HATCH_VERSION: "1.9.4"
@@ -55,7 +55,7 @@ jobs:
           *) echo "Incorrect Hatch virtualenv." && exit 1 ;;
           esac
       - name: Test that Git tag version and Python package version match
-        if: github.ref_type == 'tag' && matrix.python-version == '3.11'
+        if: github.ref_type == 'tag' && matrix.python-version == '3.12'
         run: |
           GIT_TAG_VERSION=$GITHUB_REF_NAME
           PACKAGE_VERSION=$(hatch version)
@@ -75,5 +75,5 @@ jobs:
       - name: Build Python package
         run: hatch build
       - name: Publish Python package to PyPI
-        if: github.ref_type == 'tag' && matrix.python-version == '3.11'
+        if: github.ref_type == 'tag' && matrix.python-version == '3.12'
         run: hatch publish -n -u __token__ -a ${{ secrets.PYPI_TOKEN }}

pyproject.toml

@@ -9,6 +9,7 @@ classifiers = [
   "Programming Language :: Python :: 3",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
   "Typing :: Typed",
 ]
 dependencies = []