Upgrade to mtags 1.4.2, which supports Scala 2.13.16.

Author: sjrd

project/Build.scala

@@ -1486,7 +1486,7 @@ object Build {
       BuildInfoPlugin.buildInfoDefaultSettings
 
   lazy val presentationCompilerSettings = {
-    val mtagsVersion = "1.4.1"
+    val mtagsVersion = "1.4.2"
     Seq(
       libraryDependencies ++= Seq(
         "org.lz4" % "lz4-java" % "1.8.0",