Build 3.13t

Author: timkpaine

.github/workflows/build.yaml

@@ -30,7 +30,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.11", "3.12", "3.13"]
+        python-version: ["3.11", "3.12", "3.13", "3.13t"]
 
     steps:
     - uses: actions/checkout@v5