Merge pull request #992 from ovotech/update/master/scala-library-2.13.15

Update scala-library to 2.13.15 in master

build.sbt

@@ -105,7 +105,7 @@ lazy val root = (project in file("."))
             "scm:git:[email protected]:ovotech/comms-aws.git"
           )
         ),
-        scalaVersion := "2.13.14",
+        scalaVersion := "2.13.15",
         crossScalaVersions += "2.12.20",
         resolvers ++= Seq(
           publicArtifactory