Merge pull request #206 from scala-steward/update/2.9.x/patches

[2.9.x] Patch updates

Author: mkurz

project/plugins.sbt

@@ -2,4 +2,4 @@ scalacOptions ++= Seq(
   "-feature", "-unchecked", "-deprecation",
   "-Xlint:-unused", "-Xfatal-warnings")
 
-addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.9.8")
+addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.9.9")