Version 0.64

Released January 6, 2025

Introduce common.WorkingDayTests class (#2207 by @KJhellico)
Refactor XNYS holidays: standardize US market holidays days of mourning entries (#2213 by @PPsyrius)
Add Afghanistan holidays (#2198 by @Prateekshit73, @arkid15r, @PPsyrius)
Add HebrewCalendarHolidays to holidays groups, refactor Israel holidays (#2186 by @KJhellico)
Update "Set up Python" to use 3.13 (#2180 by @arkid15r)
Update Belarus holidays: add ru & th l10n, 2024-2025 substituted holidays (#2192 by @PPsyrius)
Update El Salvador holidays, add l10n support (#2209 by @KJhellico)
Update Montenegro holidays, add l10n support (#2191 by @KJhellico)
Update Poland holidays: add Christmas Eve holiday since 2025 (#2210 by @KJhellico)
Update Ukraine holidays in 1991 (#2199 by @KJhellico)
Update XNYS: add a Day of Mourning for President Jimmy Carter (#2201 by @tackerfrink)
Update working days calculation (#2197 by @KJhellico, @arkid15r)
Add Norway holidays localization: th (#2200 by @ansntu)
Add Russia holidays localization: th (#2190 by @PPsyrius, @arkid15r)
Add Ukraine holidays localization: th (#2189 by @PPsyrius, @arkid15r)
Sign release artifacts using Sigstore (#2195 by @arkid15r)

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Full Changelog: v0.63...v0.64

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