This project was redirected to the github of the LESC-UFV research group.
The link to the project is this: https://github.com/lesc-ufv/cad4u
To update your Colab script to the new version:
!pip install git+https://github.com/lesc-ufv/cad4u.git
!git clone https://github.com/lesc-ufv/cad4u
%load_ext plugin
I'm sorry for the inconvenience.
Michael