add osx and windows testing

Author: Carreau

.github/workflows/main.yml

@@ -23,6 +23,11 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.14t"]
+        include:
+          - os: osx-latest
+            python-version: "3.14"
+          - os: windows-latest
+            python-version: "3.14"
 
     steps:
     - name: Checkout