Changes of version 21.1.0

• Add Characters
  • CYRILLIC CAPITAL LETTER EN WITH LEFT HOOK (U+0528) (#1516, #1603).
  • CYRILLIC SMALL LETTER EN WITH LEFT HOOK (U+0529) (#1516, #1603).
  • COMBINING LATIN SMALL LETTER INSULAR G (U+1ACC) (#1600).
  • COMBINING RIGHT ARROWHEAD AND DOWN ARROWHEAD BELOW (U+1DFF) (#1600).
  • TURNED ANGLE (U+29A2) (#1597).
  • TURNED COMMA (U+2E32) (#1597).
  • RAISED DOT (U+2E33) (#1597).
  • RAISED COMMA (U+2E34) (#1597).
  • TURNED SEMICOLON (U+2E35) (#1597).
  • TURNED DAGGER (U+2E38) (#1597).
  • CYRILLIC CAPITAL LETTER REVERSED DZE (U+A644) (#1597).
  • CYRILLIC SMALL LETTER REVERSED DZE (U+A645) (#1597).
  • LATIN EPIGRAPHIC LETTER REVERSED P (U+A7FC) (#1597).
  • LATIN LETTER SMALL CAPITAL TURNED G (U+1DF02) (#1597).
  • LATIN LETTER SMALL CAPITAL TURNED K (U+1DF10) (#1597).
• Fix variant selection for Cyrillic Koppa (#1584).
• Further fixup for Rs sign (#1585).
• Optimize shape consistency of e-related glyphs (#1587).
• Fix inconsistent height of circumflex and caron marks (#1598).
• Optimize shape for Cyrillic Yat (#1601).
• Fix broken shape of Thai Baht under Sans Thin (#1602).
• Fix broken shape of R-rotunda under Slab, cv17=7 (#1604).
• Fix broken shape of double-stroke (blackboard bold) R (#1605).
• Fix inverted circles (U+25D8 .. U+25DB) to reflect that they are inverted mosaics (#1606).
• Optimize shape of db and qp (#1610).
• Further optimize shape of k (#1611).