fix: stop failing follow-up tasks when one element of the matrix is dropped"

.github/workflows/unit.yaml

@@ -33,8 +33,9 @@ jobs:
     needs: [lint, mypy]
     runs-on: ubuntu-latest
     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"]
         sqlachemy-version: [""]
         include:
           # oldest python/sqlalchemy supported