* Fix memory leak [#175](https://github.com/h2oai/h2o4gpu/issues/175) [#204](https://github.com/h2oai/h2o4gpu/issues/204) * Static linking with CUDA dependencies * CUDA forward compatibility * Update NCCL to 2.4 * Update arrow to 0.12.0 * Update XGBoost * Update numpy, scipy and scikit-learn * Add experimental Matrix Factorization [#729](https://github.com/h2oai/h2o4gpu/pull/729)