Upgrade to Scala.js v0.4.0.

Author: gzm0

build.sbt

@@ -8,7 +8,7 @@ version := "0.3-SNAPSHOT"
 
 organization := "org.scala-lang.modules.scalajs"
 
-crossScalaVersions := Seq("2.10.2", "2.11.0-M7")
+crossScalaVersions := Seq("2.10.2", "2.11.0-M7", "2.11.0-M8")
 
 homepage := Some(url("http://scala-js.org/"))
 

project/build.sbt

@@ -1,5 +1,5 @@
 addSbtPlugin("me.lessis" % "bintray-sbt" % "0.1.1")
 
-addSbtPlugin("org.scala-lang.modules.scalajs" % "scalajs-sbt-plugin" % "0.3")
+addSbtPlugin("org.scala-lang.modules.scalajs" % "scalajs-sbt-plugin" % "0.4.0")
 
 addSbtPlugin("com.github.mpeltonen" % "sbt-idea" % "1.5.1")