Rebrand for Hightouch (#1) * - rename checkpoint - fix consumer abstraction * cleanup consumer abstraction * fixes * renaming * updates * fix test * fix type for 7.4 * skip tests that need mocking * remove type * add in memory consumer for testing * update * updates * update docs * simplify * simplify * updates * simplify CI * update composer spec * update docs * update readme code snippet * fix class name * update tests * update release docs * update doc * update doc * update composer spec * fix packagist url * add v8.0 to testing matrix