Update fonttools to 4.54.0

[pyup-bot]

This PR updates FontTools[lxml,ufo,unicode] from 4.53.1 to 4.54.0.

Changelog

4.54.0

----------------------------

- [Docs] Small docs cleanups by n8willis (3611)
- [Docs] cleanup code blocks by n8willis (3627)
- [Docs] fix Sphinx builds by n8willis (3625)
- [merge] Minor fixes to documentation for merge by drj11 (3588)
- [subset] Small tweaks to pyftsubset documentation by RoelN (3633)
- [Tests] Do not require fonttools command to be available by behdad (3612)
- [Tests] subset_test: add failing test to reproduce issue 3616 by anthrotype (3622)
- [ttLib] NameRecordVisitor: include whole sequence of character variants' UI labels, not just the first by anthrotype (3617)
- [varLib.avar] Reconstruct mappings from binary by behdad (3598)
- [varLib.instancer] Fix visual artefacts with partial L2 instancing by Hoolean (3635)
- [varLib.interpolatable] Support discrete axes in .designspace by behdad (3599)
- [varLib.models] By default, assume OpenType-like normalized space by behdad (3601)

Links

• PyPI: https://pypi.org/project/fonttools
• Changelog: https://data.safetycli.com/changelogs/fonttools/
• Repo: http://github.com/fonttools/fonttools

[pyup-bot]

Closing this in favor of #746