[GithubActions] Deprecating 3.8 and adding 3.13

https://devguide.python.org/versions/

Author: mmmarinho

.github/workflows/python_package.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.8, 3.9, '3.10', '3.11', '3.12']
+        python-version: [3.9, '3.10', '3.11', '3.12', '3.13']
         os: ['ubuntu-20.04', 'macos-latest', 'windows-latest', 'linux-arm64']
         experimental: [false]
         # exclude: