* Add Characters:
  - LATIN CAPITAL LETTER INSULAR F (`U+A77B`) (#1786).
  - LATIN SMALL LETTER INSULAR F (`U+A77C`) (#1786).
  - LATIN CAPITAL LETTER INSULAR S (`U+A784`) (#1786).
  - LATIN SMALL LETTER INSULAR S (`U+A785`) (#1786).
* Fix missing U+1D7F mapping (#1787).
* Fix shape of U serifs (#1788).
