Add Python 3.13 to tests. (#52)

Author: auouymous

.github/workflows/publish.yml

@@ -14,7 +14,7 @@ jobs:
       github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
       - uses: actions/checkout@v4