- Added ``feaIncludeDir`` option to allow clients such as fontmake to override the default FEA include directory used for parsing UFO features.fea (637, googlefonts/glyphsLib797).
- Fixed ModuleNotFoundError('ufoLib2') when using dottedCircleFilter.py with defcon backend (644, 650).
- [featureWriters] In `__main__`, load ufoLib2.Font using its `open` method, as ufoLib2.Font(path) no longer works (661).
- [FlattenComponentsFilter] Improve error message when referenced
components are missing from the glyph set (669).
- [postProcessor] Avoid unconditionally reloading TTFont in PostProcessor, unless required for renaming glyphs to final production names or when dropping all glyph names (485, 671).