use new wildcard and varargs syntax (#272)

Author: xuwei-k

plugin/src/main/scala/com/github/sbt/jni/plugins/JniJavah.scala

@@ -32,7 +32,7 @@ object JniJavah extends AutoPlugin {
   }
   import autoImport._
 
-  lazy val mainSettings: Seq[Setting[_]] = Seq(
+  lazy val mainSettings: Seq[Setting[?]] = Seq(
     javah / javahClasses := {
       import xsbti.compile._
       val compiled: CompileAnalysis = (Compile / compile).value
@@ -43,8 +43,8 @@ object JniJavah extends AutoPlugin {
         .keySet
         .map { vf =>
           (vf.names() match {
-            case Array(prefix, first, more @ _*) if prefix.startsWith("${") =>
-              Paths.get(first, more: _*)
+            case Array(prefix, first, more*) if prefix.startsWith("${") =>
+              Paths.get(first, more*)
             case _ =>
               Paths.get(URI.create("file:///" + vf.id().stripPrefix("/")))
           }).toFile()

plugin/src/main/scala/com/github/sbt/jni/plugins/JniLoad.scala

@@ -22,7 +22,7 @@ object JniLoad extends AutoPlugin {
 
   import autoImport._
 
-  lazy val settings: Seq[Setting[_]] = Seq(
+  lazy val settings: Seq[Setting[?]] = Seq(
     sbtJniCoreScope := Provided,
     // Macro Paradise plugin and dependencies are needed to expand annotation macros.
     // Once expanded however, downstream projects don't need these dependencies anymore

plugin/src/main/scala/com/github/sbt/jni/plugins/JniNative.scala

@@ -39,7 +39,7 @@ object JniNative extends AutoPlugin {
 
   val nativeBuildToolInstance = taskKey[BuildTool#Instance]("Get an instance of the current native build tool.")
 
-  lazy val settings: Seq[Setting[_]] = Seq(
+  lazy val settings: Seq[Setting[?]] = Seq(
     // the value retruned must match that of `com.github.sbt.jni.PlatformMacros#current()` of project `macros`
     nativePlatform := {
       try {

plugin/src/main/scala/com/github/sbt/jni/plugins/JniPackage.scala

@@ -55,7 +55,7 @@ object JniPackage extends AutoPlugin {
   import JniNative.autoImport._
   import CollectionOps._
 
-  lazy val settings: Seq[Setting[_]] = Seq(
+  lazy val settings: Seq[Setting[?]] = Seq(
     enableNativeCompilation := true,
     unmanagedNativeDirectories := Seq(baseDirectory.value / "lib_native"),
     unmanagedPlatformDependentNativeDirectories := Seq(nativePlatform.value -> baseDirectory.value / "lib_native"),