run base template tests on macos as well

Author: timkpaine

.github/workflows/build.yml

@@ -28,7 +28,10 @@ jobs:
           - js
           - jupyter
           - rust
-    runs-on: ubuntu-latest
+        os:
+          - ubuntu-latest
+          - macos-latest
+    runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4