Log Message:
py-fonttools: updated to 3.26.0

3.26.0:
- [designspace] Added a new optional layer attribute to the source element,
  and a corresponding layerName attribute to the SourceDescriptor
  object.
  Added conditionset element to the rule element to the spec, but not
  implemented in designspace reader/writer yet.
- [varLib.models] Refine modeling one last time.
- [otBase] Fixed sharing of tables referred to by different offset sizes
- [subset] Don't drop a GDEF that only has VarStore. Set to None
  empty Coverage tables in MarkGlyphSets.
- [varLib]: Added --master-finder command-line option.
- [varLib.mutator] Prune fvar nameIDs from instance's name table.
- [otTables] Allow decompiling bad ClassDef tables with invalid format, with
  warning.
- [varLib] Make STAT v1.2 and reuse nameIDs from fvar table.
- [varLib.plot] Show master locations. Set axis limits to -1, +1.
- [subset] Handle HVAR direct mapping. Passthrough 'cvar'.
  Added --font-number command-line option for collections.
- [t1Lib] Allow a text encoding to be specified when parsing a Type 1 font
  Added kind argument to T1Font constructor.
- [ttLib] Added context manager API to TTFont class, so it can be used in
  with statements to auto-close the file when exiting the context