Remove test workflow for Python 3.8 and 3.12, add for Python 3.13

Author: marcovarrone

.github/workflows/test.yaml

@@ -23,14 +23,12 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-latest
-            python: "3.8"
           - os: ubuntu-latest
             python: "3.10"
           - os: ubuntu-latest
-            python: "3.12"
+            python: "3.13"
           - os: ubuntu-latest
-            python: "3.12"
+            python: "3.13"
             pip-flags: "--pre"
             name: PRE-RELEASE DEPENDENCIES