Update scala-library to 2.13.16 (andyglow#202)

Author: scala-steward

project/ScalaVer.scala

@@ -8,7 +8,7 @@ object ScalaVer {
 
   final case object _212 extends ScalaVer("2.12.20")
 
-  final case object _213 extends ScalaVer("2.13.15")
+  final case object _213 extends ScalaVer("2.13.16")
 
   final case object _300 extends ScalaVer("3.6.2")