Drop support for Python 3.5 and 3.6

Author: maxiberta

.github/workflows/tox.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        python: [3.5, 3.6, 3.8, "3.10", "3.12"]
+        python: [3.8, "3.10", "3.12"]
 
     steps:
       - uses: actions/checkout@v2