Move to latest development versions of Chisel3

packaging/build.sbt

@@ -12,8 +12,8 @@ resolvers ++= Seq(
 )
 
 // Provide a managed dependency on X if -DXVersion="" is supplied on the command line.
-val defaultVersions = Map("chisel3"          -> "3.0-SNAPSHOT",
-                          "chisel-iotesters" -> "1.1-SNAPSHOT")
+val defaultVersions = Map("chisel3"          -> "3.1-SNAPSHOT",
+                          "chisel-iotesters" -> "1.2-SNAPSHOT")
 
 libraryDependencies ++= (Seq("chisel3","chisel-iotesters").map {
   dep: String => "edu.berkeley.cs" %% dep % sys.props.getOrElse(dep + "Version", defaultVersions(dep)) })