use new wildcard syntax

asciidoctor/src/main/scala/com/typesafe/sbt/site/asciidoctor/AsciidoctorPlugin.scala

@@ -27,7 +27,7 @@ object AsciidoctorPlugin extends AutoPlugin {
   override def projectSettings = asciidoctorSettings(Asciidoctor)
 
   /** Creates settings necessary for running Asciidoctor in the given configuration. */
-  def asciidoctorSettings(config: Configuration): Seq[Setting[_]] =
+  def asciidoctorSettings(config: Configuration): Seq[Setting[?]] =
     inConfig(config)(
       Seq(
         includeFilter := AllPassFilter,

core/src/main/scala/com/typesafe/sbt/site/Compat.scala

@@ -49,7 +49,7 @@ object Compat {
     }
   }
 
-  def watchSettings(scope: Scope): Seq[Setting[_]] =
+  def watchSettings(scope: Scope): Seq[Setting[?]] =
     Seq(
       ConfigGlobal / watchSources += new Source(
         base = (scope / sourceDirectory).value,

core/src/main/scala/com/typesafe/sbt/site/SitePreviewPlugin.scala

@@ -20,7 +20,7 @@ object SitePreviewPlugin extends AutoPlugin {
   import SitePlugin.autoImport._
   import autoImport._
 
-  override val projectSettings: Seq[Setting[_]] = Seq(
+  override val projectSettings: Seq[Setting[?]] = Seq(
     previewSite := {
       val file = makeSite.value
       val portOption = previewFixedPort.value

core/src/main/scala/com/typesafe/sbt/site/SiteScaladocPlugin.scala

@@ -20,7 +20,7 @@ object SiteScaladocPlugin extends AutoPlugin {
     config: Configuration,
     scaladocMappings: TaskKey[Seq[(File, String)]] = Compile / packageDoc / mappings,
     scaladocDir: String = "latest/api"
-  ): Seq[Setting[_]] =
+  ): Seq[Setting[?]] =
     inConfig(config)(
       Seq(
         siteSubdirName := scaladocDir,

core/src/main/scala/com/typesafe/sbt/site/preprocess/PreprocessPlugin.scala

@@ -24,7 +24,7 @@ object PreprocessPlugin extends AutoPlugin {
 
   override def projectSettings = preprocessSettings(Preprocess)
 
-  def preprocessSettings(config: Configuration): Seq[Setting[_]] =
+  def preprocessSettings(config: Configuration): Seq[Setting[?]] =
     inConfig(config)(
       Seq(
         siteSourceDirectory := siteSourceDirectory.value,

core/src/main/scala/com/typesafe/sbt/site/util/SiteHelpers.scala

@@ -14,7 +14,7 @@ object SiteHelpers {
   /** Convenience functions to add a task of mappings to a site under a nested directory. */
   def addMappingsToSiteDir(
     mappings: Def.Initialize[Task[Seq[(File, String)]]],
-    nestedDirectory: SettingKey[String]): Setting[_] =
+    nestedDirectory: SettingKey[String]): Setting[?] =
     siteMappings ++= {
       for ((f, d) <- mappings.value) yield (f, nestedDirectory.value + "/" + d)
     }
@@ -36,17 +36,17 @@ object SiteHelpers {
     zipPath
   }
 
-  def directorySettings(config: Configuration): Seq[Setting[_]] =
+  def directorySettings(config: Configuration): Seq[Setting[?]] =
     inConfig(config)(
       Seq(
         sourceDirectory := sourceDirectory.value / config.name,
         target := target.value / config.name
       ))
 
-  def watchSettings(config: Configuration): Seq[Setting[_]] =
+  def watchSettings(config: Configuration): Seq[Setting[?]] =
     Compat.watchSettings(ThisScope.in(config))
 
-  def watchSettings(scope: Scope): Seq[Setting[_]] =
+  def watchSettings(scope: Scope): Seq[Setting[?]] =
     Compat.watchSettings(scope)
 
   /**

gitbook/src/main/scala/com/typesafe/sbt/site/gitbook/GitBookPlugin.scala

@@ -23,7 +23,7 @@ object GitBookPlugin extends AutoPlugin {
   override def projectSettings = gitbookSettings(GitBook)
 
   /** Creates settings necessary for running GitBook in the given configuration. */
-  def gitbookSettings(config: Configuration): Seq[Setting[_]] =
+  def gitbookSettings(config: Configuration): Seq[Setting[?]] =
     inConfig(config)(
       Seq(
         includeFilter := AllPassFilter,

paradox/src/main/scala/com/typesafe/sbt/site/paradox/ParadoxSitePlugin.scala

@@ -18,7 +18,7 @@ object ParadoxSitePlugin extends AutoPlugin {
   import autoImport._
   import ParadoxPlugin.autoImport._
   override def projectSettings = paradoxSettings(Compile)
-  def paradoxSettings(config: Configuration): Seq[Setting[_]] = {
+  def paradoxSettings(config: Configuration): Seq[Setting[?]] = {
     val siteNameConfig = if (config == Compile) Paradox else config
     List(
       siteNameConfig / siteSubdirName := ""

sphinx/src/main/scala/com/typesafe/sbt/site/sphinx/SphinxPlugin.scala

@@ -17,7 +17,7 @@ object SphinxPlugin extends AutoPlugin {
   import autoImport._
   override def projectSettings = sphinxSettings(Sphinx)
 
-  def sphinxSettings(config: Configuration): Seq[Setting[_]] =
+  def sphinxSettings(config: Configuration): Seq[Setting[?]] =
     inConfig(config)(
       Seq(
         sphinxPackages := Seq.empty,