v1.0.0

• Update the underlying xgboost version to 1.5.2, which is the version supported by Mleap v0.20
  • NOTE: This is only used in the unit tests.
• Add allowNonZeroForMissing parameter which allows better support for pysparks VectorAssembler with sparse inputs.
  • See: https://xgboost.readthedocs.io/en/stable/jvm/xgboost4j_spark_tutorial.html?highlight=missing#dealing-with-missing-values