Upgrade/Install: Update sodium_compat to v1.19.0.

The latest version of sodium_compat includes improved compatibility with the PHP 8.0 named parameters functionality.

Release notes:
https://github.com/paragonie/sodium_compat/releases/tag/v1.19.0

A full list of changes in this update can be found on GitHub:
paragonie/sodium_compat@v1.18.0...v1.19.0

Follow-up to [49741], [51002], [51591], [52988], [54150].

Props jrf, paragoninitiativeenterprises.
Fixes #56653.

git-svn-id: https://develop.svn.wordpress.org/trunk@54310 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/sodium_compat/LICENSE

@@ -1,6 +1,6 @@
 ISC License
 
-Copyright (c) 2016-2021, Paragon Initiative Enterprises <security at paragonie dot com>
+Copyright (c) 2016-2022, Paragon Initiative Enterprises <security at paragonie dot com>
 Copyright (c) 2013-2019, Frank Denis <j at pureftpd dot org>
 
 Permission to use, copy, modify, and/or distribute this software for any