Openmc-cell-segmenter

What's Changed
* adding same mat as original cell to segmented cells by shimwell in https://github.com/fusion-energy/openmc_cell_segmenter/pull/4


**Full Changelog**: https://github.com/fusion-energy/openmc_cell_segmenter/compare/0.1.0...0.1.1

What's Changed
* Initial release of openmc-cell-segmenter


New Contributors
* shimwell made their first contribution in https://github.com/fusion-energy/openmc_cell_segmenter/pull/2

**Full Changelog**: https://github.com/fusion-energy/openmc_cell_segmenter/commits/0.1.0