Remove py3.8 testing from CI (#339)

Author: kasium

.github/workflows/main.yml

@@ -38,7 +38,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         sqlalchemy-version: [1.4.*, 2.0.*]
     runs-on: ubuntu-latest
     steps: