May I help with maintaining PyPI of spconv and cumm

[Gofinge]

Hi @traveller59 ,

Thanks for years of maintaining this excellent open-source library; it really helps a lot with my research. One of the most fantastic parts of SpConv is that you can install the package on any machine with a simple pip install. It fully relies on your long-term maintenance of this repo. I notice that you have been quite busy recently, and the pre-built SpConv with CUDA12.1 (PyTorch 2.x uses this version for rebuilding) is not available. May I ask if you need my help with maintenance? At least I can help with the release of pre-built SpConv with different CUDA versions in the next few years.

Best,
Xiaoyang