Merge pull request #255 from scala-steward/update/scala-library-2.13.15

Update scala-library to 2.13.15

Author: adpi2

build.sbt

@@ -1,5 +1,5 @@
 ThisBuild / scalaVersion := "3.3.4"
-ThisBuild / crossScalaVersions := Seq((ThisBuild / scalaVersion).value, "2.13.14")
+ThisBuild / crossScalaVersions := Seq((ThisBuild / scalaVersion).value, "2.13.15")
 
 lazy val root = project.in(file("."))
   .aggregate(collectionContrib.jvm, collectionContrib.js, collectionContrib.native)