What's Changed
* Add number of cells to each cell set node by ubyndr in https://github.com/INCATools/pandasaurus_cxg/pull/91
* Implement Stable ID Generation for Cell Sets by ubyndr in https://github.com/INCATools/pandasaurus_cxg/pull/93
**Full Changelog**: https://github.com/INCATools/pandasaurus_cxg/compare/0.2.1...0.2.3