the oldest python version is removed because of stopped backward compatibility with 3.6

Author: Natgho

.github/workflows/db-logger.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9']
+        python-version: ['3.7', '3.8', '3.9']
         django-version: ['1.9', '1.10', '1.11.17', '2.0', '2.2', '3.1', '3.2']
         exclude:
           - django-version: '2.0'