Log Message:
py-fonttools: updated to 3.38.0

3.38.0:
- [cffLib] Fixed RecursionError when unpickling or deepcopying TTFont with
  CFF table.
- [subset] Fixed AttributeError when using --desubroutinize option.
  Also, fixed desubroutinizing bug when subrs contain hints.
- [CPAL] Make Color a subclass of namedtuple.
- [feaLib] Allow hyphen in glyph class names.
- [feaLib] Added 'tables' option to __main__.py.
- [feaLib] Add support for special-case contextual positioning formatting.
- [svgLib] Support converting SVG basic shapes (rect, circle, etc.) into
  equivalent SVG paths.
- [Snippets] Added name-viewer.ipynb Jupyter notebook.