2.66.0

Complete commits list: 2.65.0...2.66.0

Summary:

• Added #2761 CarbonPeriodImmutable class — @kylekatarnls
• Added #2760 Eastern Arabic numerals to all locales of the Mashriq countries — @abdullah-alhariri
• Fixed #2762 Handle rounding with cascade factors — @kylekatarnls
• Fixed #2752 is() output when giving a month name only — @kylekatarnls
• Fixed #2753 unit tests — @rgson
• Improved #2754 Enable PHPMD on tests code — @kylekatarnls

New Contributors

• @abdullah-alhariri made their first contribution in #2760