Add Valinor to libraries.md

diff --git a/docs/migration/wsc55/libraries.md b/docs/migration/wsc55/libraries.md
index a0a2931e9e0b750261f96bc25d89088eb4c274f2..ff01c459b32f69b9cede4b8b5473eebd59b00287 100644 (file)
--- a/docs/migration/wsc55/libraries.md
+++ b/docs/migration/wsc55/libraries.md
@@ -16,6 +16,12 @@ Instead the [`idn_to_ascii`](https://www.php.net/manual/en/function.idn-to-ascii
 
 Diactoros was updated from version 2.4 to 2.22.
 
+## Input Validation
+
+WoltLab Suite 6.0 ships with cuyz/valinor 1.0 as a reliable solution to validate untrusted external input values.
+
+Refer to the documentation within the [CuyZ/Valinor](https://github.com/CuyZ/Valinor) repository for details.
+
 ## Diff
 
 WoltLab Suite 6.0 ships with sebastian/diff as a replacement for `wcf\util\Diff`.