Make single arg defs lazy val's

plugin/src/main/scala/org/apache/pekko/PekkoParadoxPlugin.scala

@@ -40,14 +40,14 @@ object PekkoParadoxPlugin extends AutoPlugin {
   val incubatorNoticeText =
     "Apache Pekko is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF."
 
-  override def requires = ParadoxPlugin
+  override lazy val requires = ParadoxPlugin
 
-  override def trigger = noTrigger
+  override lazy val trigger = noTrigger
 
-  override def projectSettings: Seq[Setting[_]] =
+  override lazy val projectSettings: Seq[Setting[_]] =
     ParadoxMaterialThemePlugin.projectSettings ++ pekkoParadoxSettings(Compile)
 
-  def pekkoParadoxGlobalSettings: Seq[Setting[_]] = Seq(
+  lazy val pekkoParadoxGlobalSettings: Seq[Setting[_]] = Seq(
     paradoxTheme := Some("org.apache.pekko" % "pekko-theme-paradox" % version),
     // Target hostname for static assets (CSS, JS, Icons, Font)
     paradoxProperties ++= {