ci: Add Python 3.13 build

Add Python 3.13 to versions tested in CI to ensure compatibility with the Numpy deprecation policy

.github/workflows/python.yml

@@ -70,6 +70,11 @@ jobs:
             python: "3.12"
             piparch: macosx_11_0_universal2
 
+          - name: osx 3.13 arm64
+            os: macos-latest
+            python: "3.13"
+            piparch: macosx_11_0_universal2
+
           # Windows py builds
 
           ## missing Microsoft Visual C++ 9.0
@@ -117,6 +122,11 @@ jobs:
             python: "3.12"
             piparch: win_amd64
 
+          - name: win64 3.13
+            os: windows-latest
+            python: "3.13"
+            piparch: win_amd64
+
     steps:
       - uses: actions/checkout@v4
         with:
@@ -267,6 +277,12 @@ jobs:
             manylinux: manylinux2014
             arch: x86_64
 
+          - name: linux 3.13 amd64
+            os: ubuntu-latest
+            pyver: cp313-cp313
+            manylinux: manylinux2014
+            arch: x86_64
+
           # Linux py builds x32
           - name: linux 2.7 i686
             pyver: cp27-cp27m