well, mima is still taking 1.5

Author: DB Tsai

project/MimaExcludes.scala

@@ -70,7 +70,11 @@ object MimaExcludes {
           "org.apache.spark.ml.regression.LeastSquaresCostFun.this"),
         ProblemFilters.exclude[MissingMethodProblem](
           "org.apache.spark.ml.classification.LogisticCostFun.this"),
-        // SQL execution is considered private.
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.ml.classification.LogisticAggregator.add"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.ml.classification.LogisticAggregator.count")
+          // SQL execution is considered private.
         excludePackage("org.apache.spark.sql.execution"),
         // The old JSON RDD is removed in favor of streaming Jackson
         ProblemFilters.exclude[MissingClassProblem]("org.apache.spark.sql.json.JsonRDD$"),