re-add windows to testing environment

add python 12 to testing environment

Author: tyler

.github/workflows/testing.yml

@@ -11,8 +11,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-13, macos-12]
-        python-version: ["3.9", "3.10", "3.11"]
+        os: [ubuntu-latest, macos-13, macos-12, windows-latest]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v4