Maintenance Update

This update includes updating the underlying test system to latest versions. Details below.

What's Changed

• Feature: work to codeception5 by @DerekCrannaford in #66
• fix: Stop core default as MASTER when no PHPversion by @DerekCrannaford in #70
• fix: BOILERPLATE, restore synch for gitflow by @DerekCrannaford in #71
• Allow test nav helper to be re-entrant by @DerekCrannaford in #75
• Fix: tests on nav level bootstrap by @DerekCrannaford in #76
• develop by @adam-buckley in #77

Full Changelog: v5.1.1...v5.1.2