Update nesbot/carbon requirement from ~1.21 to ~2.23

[dependabot-preview]

Updates the requirements on nesbot/carbon to permit the latest version.

Release notes

Sourced from nesbot/carbon's releases.

2.23.0

Complete commits list: briannesbitt/Carbon@2.22.3...2.23.0

Summary:

• #1841 Made Carbon compatible with new PHP 8 signatures of DateTime
• #1840 Added short form or year for year in Turkish
• #1837 Fixed Finnish translation
• Fixed alternate numbers in hours
• #1817 Use alternative numbers in translated duration strings
• #1831 Fixed global translator caching
• #1834 Fixed language detection in Lumen
• #1833 Improved cast() methods: now they can handle native PHP date classes and sub-classes
• Added Carbon::toDateTimeImmutable(), CarbonInterval::toDateInterval(), CarbonPeriod::toDatePeriod()
• Fixed recurrences count for CarbonPeriod created from DatePeriod
• #1822 Changed short units in Polish
• #1774 Added CarbonPeriod methods: starts(At/After/Before), ends(At/After/Before)
• #1826 Added cast() method and traits mixins to CarbonInterval and CarbonPeriod
• #1825 Added floor/ceil/round methods on CarbonInterval and CarbonPeriod
• #1829 Improved CarbonPeriod JSON serialization
• #1830 Added contains() in CarbonPeriod
• Added getIncludedStartDate() and getIncludedEndDate() in CarbonPeriod
• Added follows(), isFollowedBy() and isConsecutiveWith() in CarbonPeriod
• #1822 Fix Polish short units
• #1814 Allow to use mixins and macros with PHP 7.4 and 8
• Fixed equalTo/notEqualTo in CarbonPeriod to ignore mutability of start/end dates
• #1774 Added CarbonPeriod methods: starts(At/After/Before), ends(At/After/Before)
• #1826 Added cast() method and traits mixins to CarbonInterval and CarbonPeriod
• #1825 Added floor/ceil/round methods on CarbonInterval and CarbonPeriod
• #1782 Fixed from_now Chinese translation

Commits

• 97a0883 Merge pull request #1839 from kylekatarnls/feature/1837-fix-finnish
• baf9f4c Merge pull request #1841 from kylekatarnls/feature/1840-fix-tr-yil-short-form
• 0efc9dc Add test for setISODate()
• 50135e1 Allow PHP 8 tests to fail until new PHP build is released
• d502ae4 Remove obsolete tests
• 0e80a5e Remove temporary fix as fixed in PHP itself:
• 4261c8c Allow null in __set_state for compatibility with PHP 8
• 3033abc Implement methods that change of signature in PHP 8
• 06bfa17 Fix setISODate PHP 8 signature compatibility
• 647435f #1837 Add translation author
• Additional commits viewable in compare view

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