Error after upgrade version esri/react-arcgis to 5.0.0

[xxxle0]

Expected behavior
Will works and no error log in the console

Actual behavior
I have errors in my console log after upgrade esri/react-arcgis 5.0.0. urlUtils.addProxyRule << is not working anymore

To Reproduce

1. upgrader to 5.0.0 and you will see this error log in your console

Error messages
Any error messages you see in the console.

Screenshots
If applicable, add screenshots to help explain your problem.

Versions (please complete the following information):

• react-arcgis version: 5.0.0
• esri-loader version: 2.12.0
• ArcGIS API for JavaScript version
• Browser [e.g. chrome v77.0.3865.90]

Additional context
Add any other context about the problem here.

[gavinr]

Hi @xxxle0, please use a site like Codesandbox to post a example case of your error case. You can start with (fork) this template if you'd like.

[tomwayson]

Closing due to inactivity.