Update CI

- remove obsolete python versions 3.8, 3.9
- add py3.13

.github/workflows/test_release.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
       - uses: actions/checkout@v3
       - uses: mpi4py/setup-mpi@v1