Change supported Python versions

* Drop Python 3.7 (end of life in June 2023).
* Add Python 3.11.

Author: StevenMaude

.github/workflows/ci-build.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ['3.7', '3.8', '3.9', '3.10']
+        python: ['3.8', '3.9', '3.10', '3.11']
 
     steps:
       - name: Checkout code