onnx for python 3.13

Author: ChristianBeilschmidt

setup.cfg

@@ -36,6 +36,9 @@ install_requires =
     urllib3 >= 2.1, < 2.5
     pydantic >= 2.10.6, < 2.12
     skl2onnx >=1.17,<2
+    onnx @ https://test-files.pythonhosted.org/packages/a6/17/d5fda1165f0eac5055a9b63a00b13734a65f08ff6c9b0a54467c39b2dfea/onnx-1.18.0rc2-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.whl ; python_version>="3.13"
+
+[[onnx]]
 
 [options.extras_require]
 dev =