v3.9.1

• [baseCompiler] Fixed the variable features compiler (variableFeatures=True) not receiving the glyphs substituted by designspace rules, so rule-only alternates did not get the script and direction of the glyph they replace as they do on the varLib merging path (#730, #1005).
• [infoCompiler] Fixed STAT axis values whose name ID the variable font's fontinfo redefines silently changing meaning, e.g. a "Light" axis value pointing at the default master's typographic subfamily name ID 17 said "Italic" once a Glyphs Variable Font Setting called "Italic" renamed it. Such values are moved to a new name ID carrying their original string (#1006).