Update sbt-microsites (#3218)

* Update sbt-microsites to 1.0 (but keep using Tut)

* Use pre-1.0 microsite theme

* Update Jekyll in Travis CI config

.travis.yml

@@ -53,7 +53,7 @@ jobs:
 
     - stage: test
       env: TEST="docs"
-      install: gem install jekyll -v 2.5
+      install: gem install jekyll -v 4.0.0
       script: sbt docs/makeMicrosite
 
     - stage: test

build.sbt

@@ -186,6 +186,7 @@ lazy val docSettings = Seq(
     )
   ),
   micrositeGithubRepo := "cats",
+  micrositeTheme := "pattern",
   micrositePalette := Map(
     "brand-primary" -> "#5B5988",
     "brand-secondary" -> "#292E53",
@@ -196,6 +197,7 @@ lazy val docSettings = Seq(
     "gray-lighter" -> "#F4F3F4",
     "white-color" -> "#FFFFFF"
   ),
+  micrositeCompilingDocsTool := WithTut,
   autoAPIMappings := true,
   unidocProjectFilter in (ScalaUnidoc, unidoc) := inProjects(kernel.jvm, core.jvm, free.jvm),
   docsMappingsAPIDir := "api",

project/plugins.sbt

@@ -7,7 +7,7 @@ addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.6.1")
 addSbtPlugin("com.typesafe.sbt" % "sbt-git" % "1.0.0")
 addSbtPlugin("com.github.tkawachi" % "sbt-doctest" % "0.9.5")
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.8.1")
-addSbtPlugin("com.47deg" % "sbt-microsites" % "0.9.7")
+addSbtPlugin("com.47deg" % "sbt-microsites" % "1.0.2")
 addSbtPlugin("org.tpolecat" % "tut-plugin" % "0.6.13")
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "0.6.1")
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "0.6.1")