drop 3.8 add 3.13

Author: btr1975

.github/workflows/test-bake.yml

@@ -26,11 +26,11 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - '3.8'
-          - '3.9'
-          - '3.10'
-          - '3.11'
-          - '3.12'
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
         os:
           - ubuntu-latest
           - windows-latest