Changelog (v1.36.0...v1.37.0)

• feature #578 [RFC] Add grapheme_strrev function php 8.6 (@PhilDaiguille)
• bug #580 Fix grapheme_levenshtein() registration in polyfill-php85 (@xabbuh)
• bug #581 do not register the locale_is_right_to_left() function without the intl extension (@xabbuh)
• bug #584 [DeepClone] Drop SPL "\0" special key from deepclone_hydrate() (@nicolas-grekas)
• bug #577 [DeepClone] Cap IS_LONG objectMeta count at 1M (@nicolas-grekas)
• feature #576 [DeepClone] Drop scoped mode — mangled-only is now the only shape (@nicolas-grekas)
• feature #574 [DeepClone] Add DEEPCLONE_HYDRATE_PRESERVE_REFS flag + hot-path perf (@nicolas-grekas)