Update CI to remove django 4.0

Author: auvipy

.github/workflows/test.yaml

@@ -13,19 +13,11 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                python-version: [ 3.7, 3.8, 3.9, "3.10", "3.11", "pypy3.9" ]
-                django: [ 32, 40, 41, 42]
+                python-version: [ 3.8, 3.9, "3.10", "3.11", "pypy3.9" ]
+                django: [ 32, 41, 42]
                 exclude:
-                    - python-version: 3.7
-                      django: 40
-                    - python-version: 3.7
-                      django: 41
                     - python-version: "3.11"
                       django: 32
-                    - python-version: "3.11"
-                      django: 40
-                    - python-version: 3.7
-                      django: 42
 
         services:
             postgres: