v3.7.0

• Added --glyph-data option to pass custom GlyphData XML files to glyphsLib (#1016, #245)
• Removed MutatorMath integration, as it no longer supported for reading/writing designspaces.
  If you want to continue using MutatorMath-only features such as extrapolation or anisotropic locations you can use ufoProcessor to create instance UFOs and then compile them with fontmake (#834, #1019).
• Don't save master/instance UFOs to disk by default unless explicitly requested via -o ufo. This means fontmake will no longer automatically leave behind itself temporary build byproducts such as "master_ufo" or "instance_ufo" in the current directory, but will only build what requested in -o option.
  Plus, when the only output is ufo, the --output-dir option can also be used to specify where to save the master/instance UFOs; and --output-path can be used when one specific instance UFO is built via -i {instance.name} (#1020).
• Added support for building from/exporting to ufoLib2's UFO JSON format, an experimental, unofficial method to serialize a UFO in a single json file. The old --save-ufo-as-zip option is deprecated and replaced with a new --ufo-structure that can be 'package' (the default .ufo directory), 'zip' (.ufoz) or 'json' (.ufo.json) (#1017).
  Also added an --indent-json option to dump JSON with 2-space indentation over multiple lines. By default, --ufo-structure=json dumps the whole font as single line, no indentation.
• Added 'repacker' to the extras, enables fonttools with HarfBuzz repacker support for better/faster serialization of GPOS and GSUB table, requires uharfbuzz (44f866e).
• Added --ttf-curves option to support building glyf v1 containing cubic Bezier curves, as being proposed in https://github.com/harfbuzz/boring-expansion-spec/blob/main/glyf1.md.
  The option controls whether cu2qu is run or not, and whether all cubics are converted to quadratic (default), or only when more economical to do so ('mixed') (#1021).
• Bumped minimum requirements:
  • fonttools >= 4.42.0
    https://github.com/fonttools/fonttools/releases/tag/4.41.0
    https://github.com/fonttools/fonttools/releases/tag/4.41.1
    https://github.com/fonttools/fonttools/releases/tag/4.42.0
  • ufo2ft >= 2.33.4
    https://github.com/googlefonts/ufo2ft/releases/tag/v2.33.0
    https://github.com/googlefonts/ufo2ft/releases/tag/v2.33.1
    https://github.com/googlefonts/ufo2ft/releases/tag/v2.33.2
    https://github.com/googlefonts/ufo2ft/releases/tag/v2.33.3
    https://github.com/googlefonts/ufo2ft/releases/tag/v2.33.4
  • ufoLib >= 0.16.0
    https://github.com/fonttools/ufoLib2/releases/tag/v0.16.0