Add support for Python 3.11 in test suite (#30)

Author: jowilf

.github/workflows/test.yml

@@ -1,18 +1,19 @@
 name: Test suite
 
 on:
+  workflow_dispatch:
   push:
-    branches: ["main"]
+    branches: [ "main" ]
   pull_request:
-    branches: ["main"]
+    branches: [ "main" ]
 
 jobs:
   tests:
     name: "Python ${{ matrix.python-version }}"
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        python-version: [ "3.7", "3.8", "3.9", "3.10","3.11" ]
 
     services:
       postgres: