Update sbt-scalajs to 1.0.0

Author: scala-steward

Diff for: project/plugins.sbt

@@ -4,7 +4,7 @@ addSbtPlugin("org.tpolecat" % "tut-plugin" % "0.6.13")
 addSbtPlugin("com.47deg" % "sbt-microsites" % "1.1.0")
 addSbtPlugin("com.typesafe.sbt" % "sbt-ghpages" % "0.6.3")
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "0.6.1")
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.32")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.0.0")
 addSbtPlugin("com.github.cb372" % "sbt-explicit-dependencies" % "0.2.12")
 addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.5.0")
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.9.0")