Add Python 3.13 into pytest

Author: FanwangM

.github/workflows/pytest.yaml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        py: ["3.9", "3.10", "3.11", "3.12"]
+        py: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
       - uses: "actions/checkout@v4"