Do a better job of excluding py3.13

Author: etpeterson

.github/workflows/unit_test.yml

@@ -11,13 +11,11 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        exclude:
+          - os: windows-latest
+            python-version: "3.13"
         # Windows chokes on py3.13: https://github.com/numpy/numpy/issues/27894
-        # exclude:
-        #   - os: macos-latest
-        #     python-version: "3.7"
-        #   - os: windows-latest
-        #     python-version: "3.7"
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python