Upgrade/Install: Update sodium_compat to v1.20.0.
The latest version of sodium_compat includes a fix for the Poly1305 implementation.
References:
* [https://github.com/paragonie/sodium_compat/releases/tag/v1.20.0 sodium_compat 1.20.0 release notes]
* [https://github.com/paragonie/sodium_compat/compare/v1.19.0...v1.20.0 Full list of changes in sodium_compat 1.20.0]
Follow-up to [49741], [51002], [51591], [52988], [54150], [54310].
Props jrf, costdev, paragoninitiativeenterprises, mukesh27.
Fixes #58224.
Built from https://develop.svn.wordpress.org/trunk@55699
git-svn-id: http://core.svn.wordpress.org/trunk@55211 1a063a9b-81f0-0310-95a4-ce76da25c4cd
a8390f5f7c