try windows and mac just to see what happens

Author: jpstroop

.github/workflows/ci.yml

@@ -13,6 +13,7 @@ jobs:
   test:
     strategy:
       matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ["pypy3.11", "3.11", "3.12", "3.13"]
     name: test
     runs-on: ubuntu-latest