Check against more recent python versions in ci

Author: rmjarvis

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
         strategy:
             matrix:
                 os: [ ubuntu-latest, macos-latest ]
-                py: [ 3.7, 3.8, 3.9 ]
+                py: [ 3.12, 3.13 ]
 
         steps:
             - uses: actions/checkout@v2