remove python 3.9 support

Author: MeadBarrel

.github/workflows/python-package-main.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
       fail-fast: false
     defaults:
       run: