CI: run tests on macos (#184)

Author: jakevdp

.github/workflows/test.yaml

@@ -25,7 +25,7 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        os: ["ubuntu-latest"]
+        os: ["ubuntu-latest", "macos-latest"]
         python-version: ["3.10", "3.11", "3.12"]
 
     steps: