Requirement section outdated

[sukjulian]

Great code :) When I tried to install for the first time I paid (too) close attention to the requirement section in the README.md and installed PyTorch 1.2, however some CUDA-related dependency issue made it impossible to run the code. Using Python 3.8 and PyTorch 1.10.1 everything works fine :) Additionally I had to install "gputil" which was not mentioned in the requirements.

[Linusnie]

to add to this, I also had to specify scikit-iamge==0.18.1 to get the marching_cubes_lewiner function