drop python versions incompatible with dev dependency

Author: Andrei Bratu

.github/workflows/ci.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11"]
     steps:
       - name: Checkout repo
         uses: actions/checkout@v3
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11"]
     steps:
       - name: Checkout repo
         uses: actions/checkout@v3