also test on macos-latest

Author: svlandeg

.github/workflows/test.yml

@@ -25,7 +25,7 @@ jobs:
   test:
     strategy:
       matrix:
-        os: [ ubuntu-latest ]
+        os: [ ubuntu-latest, macos-latest ]
         python-version: [ "3.12" ]
         pydantic-version:
           - pydantic-v1