Add get getUpdatedPartitions and optimizeUpdatedPartitions

[zeotuan]

add an API similar to what was implemented in mrpowers-io/levi#23 to get recently updated partitions
Also add an additional API to perform optimize on delta table using result from the above mentioned API since everyone will most likely perform similar operation to translate them to optimize condition

def getUpdatedPartitions(path: String, startTime: Option[Instant], endTime: Option[Instant]): Array[Map[String, String]]

def optimizeUpdatedPartition(path: String, startTime: Option[Instant], endTime: Option[Instant], zOrderCols: Option[Seq[String]] = None): DataFrame