Update to scala-java8-compat 0.4.0

Author: retronym

build.xml

@@ -314,7 +314,7 @@ TODO:
 
       <!-- scala-java8-compat, used by the experimental -target jvm-1.8 support. -->
       <if><isset property="scala-java8-compat.package"/><then>
-        <property name="scala-java8-compat.version" value="0.2.0"/>
+        <property name="scala-java8-compat.version" value="0.4.0"/>
         <property name="scala-java8-compat.binary.version" value="2.11"/>
         <artifact:dependencies pathId="scala-java8-compat.classpath" filesetId="scala-java8-compat.fileset">
           <dependency groupId="org.scala-lang.modules" artifactId="scala-java8-compat_${scala-java8-compat.binary.version}" version="${scala-java8-compat.version}">