Xgboost-ray

- Updated API to work with XGBoost 2.0 (296)

- Update Ray API usage (292, 293)

Better Ray Dataset support (283, 287)

Update CI (288)

What's Changed
* Bump version to 0.1.16 by Yard1 in https://github.com/ray-project/xgboost_ray/pull/271
* Fix _ray_get_act_cpus and set nthread in param passed to DMatrix creation by kira-lin in https://github.com/ray-project/xgboost_ray/pull/274
* Fix cutting edge CI failure by Yard1 in https://github.com/ray-project/xgboost_ray/pull/276
* Mark Ray Dataset as always having enough shards by Yard1 in https://github.com/ray-project/xgboost_ray/pull/275
* Fix lint by Yard1 in https://github.com/ray-project/xgboost_ray/pull/277
* Add QuantileDMatrix support by kira-lin in https://github.com/ray-project/xgboost_ray/pull/279
* Fix sklearn tests by krfricke in https://github.com/ray-project/xgboost_ray/pull/280
* Reformat using black by krfricke in https://github.com/ray-project/xgboost_ray/pull/281

New Contributors
* kira-lin made their first contribution in https://github.com/ray-project/xgboost_ray/pull/274

**Full Changelog**: https://github.com/ray-project/xgboost_ray/compare/v0.1.15...v0.1.16

What's Changed
* Bump version to 0.1.15 by Yard1 in https://github.com/ray-project/xgboost_ray/pull/268
* Fix dataset conversion with `distributed=False` by Yard1 in https://github.com/ray-project/xgboost_ray/pull/270


**Full Changelog**: https://github.com/ray-project/xgboost_ray/compare/v0.1.14...v0.1.15

What's Changed
* Bump version to 0.1.14 by Yard1 in https://github.com/ray-project/xgboost_ray/pull/254
* Clarify `lazy` in `RayDMatrix` docstring by Yard1 in https://github.com/ray-project/xgboost_ray/pull/255
* Fix CI with latest xgboost by Yard1 in https://github.com/ray-project/xgboost_ray/pull/257
* Improve Ray Datasets support by Yard1 in https://github.com/ray-project/xgboost_ray/pull/259
* Mention env var in PG creation timeout message by Yard1 in https://github.com/ray-project/xgboost_ray/pull/261
* Add feature weights support by mozjay0619 in https://github.com/ray-project/xgboost_ray/pull/265
* Fix modin import with mismatched pandas version by Yard1 in https://github.com/ray-project/xgboost_ray/pull/267

New Contributors
* mozjay0619 made their first contribution in https://github.com/ray-project/xgboost_ray/pull/265

**Full Changelog**: https://github.com/ray-project/xgboost_ray/compare/v0.1.13...v0.1.14