start with python 3.9

Author: ThomasWollmann

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [Ubuntu, macOS, Windows]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]        
+        python-version: ["3.9", "3.10", "3.11"]        
         include:
           - os: Ubuntu
             image: ubuntu-22.04