Expand CI, enable windows testing

Author: timkpaine

.github/workflows/build.yml

@@ -29,8 +29,8 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
-        python-version: ["3.9"]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v4