Update sbt-microsites to 0.6.1 (typelevel#1868)

build.sbt

@@ -1,4 +1,4 @@
-import com.typesafe.sbt.SbtGhPages.GhPagesKeys._
+import microsites._
 import sbtunidoc.Plugin.UnidocKeys._
 import ReleaseTransformations._
 import scala.xml.transform.{RewriteRule, RuleTransformer}
@@ -149,7 +149,12 @@ lazy val docSettings = Seq(
   micrositeBaseUrl := "cats",
   micrositeDocumentationUrl := "api",
   micrositeGithubOwner := "typelevel",
-  micrositeExtraMdFiles := Map(file("CONTRIBUTING.md") -> "contributing.md"),
+  micrositeExtraMdFiles := Map(
+    file("CONTRIBUTING.md") -> ExtraMdFileConfig(
+      "contributing.md",
+      "home"
+    )
+  ),
   micrositeGithubRepo := "cats",
   micrositePalette := Map(
     "brand-primary" -> "#5B5988",
@@ -174,6 +179,7 @@ lazy val docSettings = Seq(
     "-sourcepath", baseDirectory.in(LocalRootProject).value.getAbsolutePath,
     "-diagrams"
   ),
+  scalacOptions in Tut ~= (_.filterNot(Set("-Ywarn-unused-import", "-Ywarn-dead-code"))),
   git.remoteRepo := "git@github.com:typelevel/cats.git",
   includeFilter in makeSite := "*.html" | "*.css" | "*.png" | "*.jpg" | "*.gif" | "*.js" | "*.swf" | "*.yml" | "*.md" | "*.svg",
   includeFilter in Jekyll := (includeFilter in makeSite).value
@@ -185,9 +191,7 @@ lazy val docs = project
   .settings(catsSettings)
   .settings(noPublishSettings)
   .settings(unidocSettings)
-  .settings(ghpages.settings)
   .settings(docSettings)
-  .settings(tutScalacOptions ~= (_.filterNot(Set("-Ywarn-unused-import", "-Ywarn-dead-code"))))
   .settings(commonJvmSettings)
   .dependsOn(coreJVM, freeJVM)
 

project/plugins.sbt

@@ -10,6 +10,6 @@ addSbtPlugin("com.typesafe.sbt"    % "sbt-git"               % "0.8.5")
 addSbtPlugin("org.scala-js"        % "sbt-scalajs"           % "0.6.19")
 addSbtPlugin("com.github.tkawachi" % "sbt-doctest"           % "0.5.0")
 addSbtPlugin("org.xerial.sbt"      % "sbt-sonatype"          % "1.1")
-addSbtPlugin("com.fortysevendeg"   % "sbt-microsites"        % "0.3.2")
+addSbtPlugin("com.47deg"           % "sbt-microsites"        % "0.6.1")
 addSbtPlugin("com.dwijnand"        % "sbt-travisci"          % "1.1.0")
 addSbtPlugin("org.lyranthe.sbt"    % "partial-unification"   % "1.0.0")