pypi.org provides only 10GB of free space for open-source projects.

Each new release of sherpa-onnx occupies about 800MB, so we have to delete previous releases otherwise pypi.org refuses to accept new releases due to limited spaces.

To let users install previous versions, we also publish wheels to huggingface and users can find them at

https://k2-fsa.github.io/sherpa/onnx/cpu.html
and
https://k2-fsa.github.io/sherpa/onnx/cpu-cn.html (for users without access to huggingface.co)