Update scala-library, scala-reflect to 2.13.6 (#202)

Co-authored-by: Alexandre Archambault <alexarchambault@users.noreply.github.com>

Author: scala-steward

project/Settings.scala

@@ -5,7 +5,7 @@ import sbt.Keys._
 
 object Settings {
 
-  def scala213 = "2.13.5"
+  def scala213 = "2.13.6"
   def scala212 = "2.12.15"
 
   lazy val shared = Seq(