[sbt] update spark-test

Author: Anastasios Zouzias

build.sbt

@@ -135,7 +135,7 @@ libraryDependencies ++= Seq(
 libraryDependencies ++= Seq(
   "org.apache.spark" %% "spark-core" % testSparkVersion.value % "test" force(),
   "org.apache.spark" %% "spark-sql" % testSparkVersion.value % "test" force(),
-  "com.holdenkarau"  %% "spark-testing-base" % s"2.3.1_0.10.0" % "test" intransitive(),
+  "com.holdenkarau"  %% "spark-testing-base" % s"2.4.0_0.11.0" % "test" intransitive(),
   "org.scala-lang"    % "scala-library" % scalaVersion.value % "compile"
 )