v1.1.0

Added

• New class RRule\RSet (recurrence set) that can combine multiple RRULE, EXRULE, RDATE and EXDATE. #7
• New interface RRule\RRuleInterface to unify RRule and RSet
• New methods: isFinite(), isInfinite()

Fixed

• Fix bug preventing the iteration of multiple instances of RRule at the same time
• Fix occursAt failing when the date passed was a different timezone #8
• Fix bug at WEEKLY frequency with a partially filled cache in some circumstances
• Fix various reference bugs causing corruption of the cache in some circumstances (related to DateTime object being mutable)

Removed

• The alias RRule::occursOn has been removed (use occursAt instead)