PHP library for working with recurrence rules (RRULE); meant to help with recurring calendar events.
Bump minimum PHP version to 7.2
Method signatures were changed: \DateTime became \DateTimeInterface
Support for PHP 5.3 and PHP 5.4 are dropped (\DateTimeInterface was introduced in PHP 5.5)
No new functionality. Just a bug fix that potentially alters the generated occurrence set, so I'm releasing it as a breaking change.
See #106