Merge pull request #112 from target/update/spark-sql-2.3.4

Update spark-sql to 2.3.4

Author: c-horn

build.sbt

@@ -3,7 +3,7 @@ organization := "com.target"
 
 scalaVersion := "2.11.12"
 
-val sparkVersion = "2.3.1"
+val sparkVersion = "2.3.4"
 
 val circeVersion = "0.10.1"