Update Scala Native to 0.5.6

Author: plokhotnyuk

build.sbt

@@ -93,7 +93,6 @@ lazy val nativeSettings = Seq(
   nativeConfig ~= {
     _.withMode(Mode.releaseFast) // TODO: Test with `Mode.releaseSize` and `Mode.releaseFull`
       .withLTO(LTO.none)
-      .withGC(GC.boehm) // FIXME: Remove after fixing of https://github.com/scala-native/scala-native/issues/4032
   },
   coverageEnabled := false // FIXME: Unexpected linking error
 )

project/plugins.sbt

@@ -4,7 +4,7 @@ addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.3.2")
 addSbtPlugin("org.scala-js" % "sbt-jsdependencies" % "1.0.2")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.17.0")
 addSbtPlugin("ch.epfl.scala" % "sbt-scalajs-bundler" % "0.21.1")
-addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.5.5")
+addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.5.6")
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.12.2")
 addSbtPlugin("com.github.sbt" % "sbt-release" % "1.4.0")
 addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.3.0")