v2.1.0

• Try to provide better error messages. Use the --verbose DEBUG switch to get
  tracebacks again.
• Disabled shiv zipapps, as nobody seemed to use them.
• Updated dependencies:
  • fonttools >= 4.6.0
    https://github.com/fonttools/fonttools/releases/tag/4.4.1
    https://github.com/fonttools/fonttools/releases/tag/4.4.2
    https://github.com/fonttools/fonttools/releases/tag/4.4.3
    https://github.com/fonttools/fonttools/releases/tag/4.5.0
    https://github.com/fonttools/fonttools/releases/tag/4.6.0
  • glyphsLib >= 5.1.7
    https://github.com/googlefonts/glyphsLib/releases/tag/v5.1.7
  • ufo2ft >= 2.13.0
    https://github.com/googlefonts/ufo2ft/releases/tag/v2.12.1
    https://github.com/googlefonts/ufo2ft/releases/tag/v2.12.2
    https://github.com/googlefonts/ufo2ft/releases/tag/v2.12.3
    https://github.com/googlefonts/ufo2ft/releases/tag/v2.13.0
  • ufoLib2 >= 0.6.2
    https://github.com/fonttools/ufoLib2/releases/tag/v0.6.2