Revert "Remove python 3.7 from test matrix"

This reverts commit 216da37.

.github/workflows/workflow.yml

@@ -35,7 +35,7 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
         redis-version: [4, 5, 6, 7]
         redis-py-version: [3.5.0]