Update sbt-dependency-graph to 0.10.0-RC1

Previous versions don't seem to work with latest sbt 1.3.x
diff --git a/project/plugins.sbt b/project/plugins.sbt
index f573ab8..eb746b2 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -30,4 +30,4 @@
 addSbtPlugin("com.jsuereth" % "sbt-pgp" % "2.0.1")
 
 // Provides the ability to generate dependency graphs
-addSbtPlugin("net.virtual-void" % "sbt-dependency-graph" % "0.9.2")
+addSbtPlugin("net.virtual-void" % "sbt-dependency-graph" % "0.10.0-RC1")