ci: add 3.13

Author: henryiii

.github/workflows/test.yml

@@ -26,6 +26,7 @@ jobs:
           - '3.10'
           - '3.11'
           - '3.12'
+          - '3.13'
     runs-on: ${{ matrix.os }}
 
     name: ${{ matrix.os }}, Python ${{ matrix.python-version }}