Add php 8 as supported dependency

Update composer to support php 8 projects.

Update dependencies and php version

• php 7.4 required
• updated dependencies
• remove stdClass instances
• archive combell-nl/combell-api and add notice in this repo

Updated samples v2

Samples were updated for v2 of the Combell API, but never released. Now a fresh install has v2 examples.

First release of the Combell API

This is the first release of the Combell API.