Updated build pre-release version

Author: mandar2812

build.sbt

@@ -12,7 +12,7 @@ packageDescription := "DynaML is a scala library/repl for implementing and worki
 lazy val commonSettings = Seq(
   name := "DynaML",
   organization := "io.github.mandar2812",
-  version := "v1.4-beta.3",
+  version := "v1.4-beta.6",
   scalaVersion in ThisBuild := "2.11.7",
   mainClass in Compile := Some("io.github.mandar2812.dynaml.DynaML"),
   fork in run := true,