Drop unsupported versions of Python

Author: cclauss

.github/workflows/commit.yml

@@ -35,7 +35,7 @@ jobs:
 
     strategy:
         matrix:
-            python: ['3.6', '3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+            python: ['3.9', '3.10', '3.11', '3.12', '3.13']
 
     runs-on: ubuntu-latest