chore: prep v4.2.1

jkowalleck · jkowalleck · commit 0443e0c27d9d · 2023-10-27T16:31:59.000+02:00
Signed-off-by: Jan Kowalleck &lt;jan.kowalleck@gmail.com&gt;
diff --git a/HISTORY.md b/HISTORY.md
@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 
 ## unreleased
 
+
+## 4.2.1 - 2023-10-27
+
 * Docs
   * Moved all non-public API into a sub-namespace called `_internal`, so that its reliability is obvious. (via [#427])
 
diff --git a/semver.txt b/semver.txt
@@ -1 +1 @@
-4.2.0
+4.2.1
