Update sbt-paradox to 0.8.0 (#147)

* Update sbt-paradox to 0.8.0

* Use MarkdownTestkit

* scalafmt

Co-authored-by: Arnout Engelen <arnout@bzzt.net>
Co-authored-by: Ignasi Marimon-Clos <ignasi@lightbend.com>

Author: 3 people

build.sbt

@@ -10,8 +10,8 @@ name             := "sbt-paradox-apidoc"
 addSbtPlugin(Library.sbtParadox)
 libraryDependencies ++= Seq(
   Library.classgraph,
-  Library.jtidy     % Test,
-  Library.scalatest % Test
+  Library.scalatest      % Test,
+  Library.paradoxTestkit % Test
 )
 
 licenses += ("Apache-2.0", url("https://www.apache.org/licenses/LICENSE-2.0"))

project/Dependencies.scala

@@ -1,8 +1,8 @@
 import sbt._
 
 object Library {
-  val classgraph = "io.github.classgraph"  % "classgraph"  % "4.8.77"
-  val jtidy      = "net.sf.jtidy"          % "jtidy"       % "r938"
-  val sbtParadox = "com.lightbend.paradox" % "sbt-paradox" % "0.6.9"
-  val scalatest  = "org.scalatest"         %% "scalatest"  % "3.1.1"
+  val classgraph     = "io.github.classgraph"  % "classgraph"  % "4.8.77"
+  val sbtParadox     = "com.lightbend.paradox" % "sbt-paradox" % "0.8.0"
+  val scalatest      = "org.scalatest"         %% "scalatest"  % "3.1.1"
+  val paradoxTestkit = "com.lightbend.paradox" %% "testkit"    % "0.8.0"
 }

src/test/scala/com/lightbend/paradox/apidoc/ApidocDirectiveSpec.scala

@@ -19,9 +19,12 @@ package com.lightbend.paradox.apidoc
 import java.io.IOException
 
 import com.lightbend.paradox.ParadoxException
-import com.lightbend.paradox.markdown.Writer
+import com.lightbend.paradox.markdown.{MarkdownTestkit, Writer}
 
-class ApidocDirectiveSpec extends MarkdownBaseSpec {
+import org.scalatest.matchers.should.Matchers
+import org.scalatest.flatspec.AnyFlatSpecLike
+
+class ApidocDirectiveSpec extends MarkdownTestkit with Matchers with AnyFlatSpecLike {
   val rootPackage = "akka"
 
   val allClasses = Array(