find_type_conversion deleted, but convert_coreml tools needs it

Hi, guys. 
I'm having an issue while transforming coreml model to onnx. 
When I try the example in the web page, which is quite simple, I got an error while using parse_coreml, because find_type_conversion does not exist anymore. 
I'm using 1.14.0. 
Is coreml deprecated?. I have seen only 3.1 version is supported.