update onnx python package version

Author: p-lanza

requirements.txt

@@ -2,7 +2,7 @@ lit~=15.0
 # numpy 1.24 deprecates np.object, np.bool, np.float, np.complex, np.str,
 # and np.int which are used heavily in onnx-mlir.
 numpy==2.0.1
-onnx==1.17.0
-protobuf==4.21.12
+onnx==1.19.1
+protobuf==4.25.3
 pytest==8.3.2
 pytest-xdist==3.6.1

utils/gen_onnx_mlir.py

@@ -66,7 +66,7 @@
 
 # ==UPDATE_ONNX_VERSION_OPSET==
 # Look for tag above and update all references when upgrading the ONNX support within ONNX-MLIR.
-current_onnx_version = "1.17.0"
+current_onnx_version = "1.19.1"
 
 # Check the version of onnx package being used.
 if (