Merge of feature/php-8.1

The original repository no longer seems to be maintained, so I've created this fork from the original maxbanton/cwh repository and merged the existing feature/php-8.1 branch. This provides compatibility with version 3 of Seldaek/monolog and naturally requires php >= 8.1.

After a minor fix it seems to work fine, but I've still marked this release as pre-release until I can run this in a production environment next week.

For anyone who'd like to try it out, please feel free to add to your composer.json require section as:

"phpnexus/cwh": "^v3.0.0-RC1@dev"

Note: by default the usual composer require command doesn't allow installation of packages not marked as "stable", hence the need to add directly to composer.json.