Add support for Python 3.12 (#21)

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
         with: {fetch-depth: 0}  # deep clone for setuptools-scm
       - uses: actions/setup-python@v4
         id: setup-python
-        with: {python-version: "3.11"}
+        with: {python-version: "3.12"}
       - name: Run static analysis and format checkers
         run: pipx run pre-commit run --all-files --show-diff-on-failure
       - name: Build package distribution files
@@ -54,7 +54,7 @@ jobs:
       - uses: actions/checkout@v3
         with: {fetch-depth: 0}  # deep clone for setuptools-scm
       - uses: actions/setup-python@v4
-        with: {python-version: "3.11"}
+        with: {python-version: "3.12"}
       - name: Build docs and run doctests and linkcheck
         run: pipx run --spec tox==3.27.1 tox -e clean,docs,doctests,linkcheck
 
@@ -67,7 +67,8 @@ jobs:
         - "3.8"  # oldest Python supported by PSF
         - "3.9"
         - "3.10"
-        - "3.11"  # newest Python that is stable
+        - "3.11"
+        - "3.12"  # newest Python that is stable
         platform:
         - ubuntu-latest
         - macos-latest
@@ -100,7 +101,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
-        with: {python-version: "3.11"}
+        with: {python-version: "3.12"}
       - name: Retrieve pre-built distribution files
         uses: actions/download-artifact@v3
         with: {name: python-distribution-files, path: dist/}

setup.cfg

@@ -41,6 +41,7 @@ classifiers =
 	Programming Language :: Python :: 3.9
 	Programming Language :: Python :: 3.10
 	Programming Language :: Python :: 3.11
+	Programming Language :: Python :: 3.12
 	Topic :: Software Development :: Libraries
 	Topic :: Software Development :: Libraries :: Python Modules
     Topic :: Utilities