Changing python to 3.11 in build

Author: chriswedgwood

.github/workflows/pythonpackage.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.7]
+        python-version: [3.11]
     services:
       postgres:
         image: postgres:12