 * \[**Breaking**\] Metric override name change: `xheight` → `xHeight`.
 * Add variant selector for dot and comma diacritics (#1309).
 * Fix enclosed glyphs' placement when having glyphs with different Y-shifting (#1310).
 * Add metric override for `archDepth` and `smallArchDepth` (#1313).
 * Fix feature application on OBJECT REPLACEMENT CHARACTER (`U+FFFC`) and REPLACEMENT CHARACTER (`U+FFFD`) (#1314).
