Add 3.13 CI

Author: AlexanderWells-diamond

.github/workflows/code.yml

@@ -178,7 +178,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-13]
-        python: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+        python: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     name: build/${{ matrix.os }}/${{ matrix.python }}
     runs-on: ${{ matrix.os }}