v1.x-1.4.0

Attention! This module now requires PHP 7.3 at least. That's because php-rrule now requires that as minimum.

• Add phpcs workflow by @indigoxela in #68
• Issue #32: Update php-rrule to v3.0.0, raise PHP min version by @indigoxela in #69

Full Changelog: 1.x-1.3.0...1.x-1.4.0