Merge pull request #810 from mkurz/scala-parser-combinators-2.4.0

scala-parser-combinators 2.4.0

build.sbt

@@ -12,7 +12,7 @@ val ScalaTestVersion = "3.2.19"
 def parserCombinators(scalaVersion: String) = "org.scala-lang.modules" %% "scala-parser-combinators" % {
   CrossVersion.partialVersion(scalaVersion) match {
     case Some((2, _)) => "1.1.2"
-    case _            => "2.3.0"
+    case _            => "2.4.0"
   }
 }