Changes of version 26.1.0

• Add characters:
  • RIGHT ARROW WITH SMALL CIRCLE (U+21F4) (#1900).
  • LEFT RIGHT ARROW THROUGH SMALL CIRCLE (U+2948) (#1900).
  • LEFT ARROW WITH SMALL CIRCLE (U+2B30) (#1900).
• Make Cyrillic Abkhasian Che respond to C's serifs (#1898).
• Make lowercase Wynn respond to thorn's serifs.
• Drop APL form for U+220D as it is not used by any APL languages (#1901).
• Add XH-height middle-serifed and dual-serifed variants for Eszet (#1904).
• Remove duplicate variant glyphs for U+0272 (#1905).
• Make the top serif of Yogh (U+021C, U+021D) to follow Cyrillic Ze's variant selector (#1908).
• Merge duplicate variants of t with retroflex hook (U+0288, U+1DF09) (#1909).
• Fix detached palatal hook on `U+01AB`` when t is both hookless/tailless and asymmetric (#1910).
• Fix cv36, cv46, cv47, cv48, cv49, cv50, cv61, and cv74 under Curly Slab.
• Fix serifs of w under Etoile Italic.