Add 3.4.2 announcement

Author: Kordyjan

_data/scala-releases.yml

@@ -1,7 +1,7 @@
 - category: current_version
   title: Current 3.4.x release
-  version: 3.4.1
-  release_date: March 29, 2024
+  version: 3.4.2
+  release_date: May 16, 2024
 - category: current_version
   title: Current 3.3.x LTS release
   version: 3.3.3

_downloads/2024-06-16-3.4.2.md

@@ -0,0 +1,10 @@
+---
+title: Scala 3.4.2
+start: 16 May 2024
+layout: downloadpage
+release_version: 3.4.2
+release_date: "May 16, 2024"
+permalink: /download/3.4.2.html
+license: <a href="https://www.scala-lang.org/license/">Apache License, Version 2.0</a>
+api_docs: https://www.scala-lang.org/api/3.4.2/
+---

_posts/2024-05-16-release-notes-3.4.2.md

@@ -0,0 +1,10 @@
+---
+category: announcement
+permalink: /news/3.4.2
+title: "Scala 3.4.2 is now available!"
+---
+Scala 3.4.2 is now available!
+
+Besides multiple fixed bugs, 3.4.2 brings a significant refactor and improvement of DX of command line parameters. Also, REPL received needed care with autocompletion now showing full method signatures and minor annoying bugs from before 3.0.0 being fixed.
+
+For a full list of changes and contributor credits, please refer to the [release notes](https://github.com/scala/scala3/releases/tag/3.4.2).