CI: Verify using Python 3.13

Author: amotl

.github/workflows/main.yml

@@ -23,7 +23,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-latest"]
-        python-version: ["3.9", "3.12"]
+        python-version: ["3.9", "3.13"]
 
     env:
       OS: ${{ matrix.os }}

pyproject.toml

@@ -52,6 +52,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: Implementation :: CPython",
   "Topic :: Documentation",
   "Topic :: Documentation :: Sphinx",