Remove Django 2.2

Author: j4mie

.github/workflows/ci.yml

@@ -10,14 +10,12 @@ jobs:
     strategy:
       matrix:
         python: [3.6, 3.7, 3.8, 3.9, "3.10"]
-        django: [2.2, 3.2, 4.0]
+        django: [3.2, 4.0]
         exclude:
           - python: 3.6
             django: 4.0
           - python: 3.7
             django: 4.0
-          - python: "3.10"
-            django: 2.2
         database_url:
           - postgres://runner:password@localhost/project
           - mysql://root:[email protected]/project