Run the packaging test on macos and Windows too

Author: sbidoul

.github/workflows/ci.yml

@@ -64,7 +64,10 @@ jobs:
 
   packaging:
     name: packaging
-    runs-on: ubuntu-22.04
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, Windows]
 
     steps:
       - uses: actions/checkout@v4