DO NOT MERGE - temporarily drop py3.6 from CI

Author: mr-c

.github/workflows/ci-tests.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       matrix:
         py-ver-major: [3]
-        py-ver-minor: [6, 7, 8, 9, 10]
+        py-ver-minor: [7, 8, 9, 10]
         step: [lint, unit, bandit, mypy]
 
     env: