upgrade onnx to 1.14 so pip install works on macOS (#334)

* upgrade onnx so pip install works on macOS

* allow older version

* Update setup.py

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Co-authored-by: Michael Goin <michael@neuralmagic.com>

Author: YixuanSeanZhou

setup.py

@@ -41,7 +41,7 @@
 
 _deps = [
     "numpy>=1.0.0,<=1.21.6",
-    "onnx>=1.5.0,<=1.12.0",
+    "onnx>=1.5.0,<1.15.0",
     "pyyaml>=5.1.0",
     "requests>=2.0.0",
     "tqdm>=4.0.0",