Update sbt-header to 5.6.5 in 2.12.x
Update sbt-header to 5.6.5 in 2.12.x

lrytz/scala,lrytz/scala,lrytz/scala,scala/scala,scala/scala,scala/scala,lrytz/scala,lrytz/scala,scala/scala,scala/scala,lrytz/scala,scala/scala