Bumps [github.com/RoaringBitmap/roaring](https://github.com/RoaringBitmap/roaring) from 0.5.5 to 0.6.0.
- [Release notes](https://github.com/RoaringBitmap/roaring/releases)
- [Commits](https://github.com/RoaringBitmap/roaring/compare/v0.5.5...v0.6.0

)

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