Run on currently supported Python versions 3.9-3.13. Deprecate 3.7-3.8.

Author: Bryan Bartley

.github/workflows/python-package.yml

@@ -18,8 +18,8 @@ jobs:
       fail-fast: false
       matrix:
         # Default builds are on Ubuntu
-        os: [ubuntu-22.04]
-        python-version: ['3.7', '3.8', '3.9', '3.10', 'pypy-3.9']
+        os: [ubuntu-latest]
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', 'pypy-3.10']
         include:
           # Also test on macOS and Windows using latest Python 3
           - os: macos-latest