v1.6.0

• Support new lib key for the "Keep Glyphs" custom parameter introduced since glyphsLib 2.3 (#446).
• Don't generate default kern/mark/mkmk feaures when --interpolate-layout option is passed, as they will be overwritten by the interpolated GPOS.
• Bumped minimum requirements:
  • fonttools >= 3.28.0
    • Fixed an issue in varLib's model resolution algorithm
    • It now uses a new rounding function better suited for visual data such as coordinates, advances, deltas, etc.
  • ufo2ft >= 2.1.0
    • Fixed issue when hhea/vhea metrics contain float values which need to be rounded to integers
  • glyphsLib >= 2.4.0
    • Fixed regression in the generated designspace.filename when a custom --family-name is provided that could lead to fontmake outputs overwriting each other
    • Added support for "Reencode Glyphs" instance custom parameter.

Please consult the respective changelogs for the full list of changes.