[autorelease] Drop Python 3.8 support.

Author: whitequark

.github/workflows/package.yml

@@ -5,11 +5,11 @@ jobs:
     strategy:
       matrix:
         python-version:
-        - '3.8'
         - '3.9'
         - '3.10'
         - '3.11'
         - '3.12'
+        - '3.13'
         - '3.13-dev'
         - 'pypy-3.8'
         - 'pypy-3.9'