use latest scala-module plugin version

SethTisue · SethTisue · commit 937bd83d9cf7 · 2017-03-17T07:57:10.000-07:00
no special reason, just keeping current
diff --git a/project/plugins.sbt b/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("org.scala-lang.modules" % "scala-module-plugin" % "1.0.3")
+addSbtPlugin("org.scala-lang.modules" % "scala-module-plugin" % "1.0.4")

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-addSbtPlugin("org.scala-lang.modules" % "scala-module-plugin" % "1.0.3")`
	`1`	`+addSbtPlugin("org.scala-lang.modules" % "scala-module-plugin" % "1.0.4")`