Scheduled weekly dependency update for week 45

[pyup-bot]

Update glyphsLib from 6.9.3 to 6.9.4.

Changelog

6.9.4

- Reverted "[builder] Reorder .notdef and space glyphs in public.glyphOrder".
It didn't quite match Glyphs.app's behavior and would produce sudden, unexpected diffs for working fonts that already provide an explicit `glyphOrder` parameter (1038).

Links

• PyPI: https://pypi.org/project/glyphslib
• Changelog: https://data.safetycli.com/changelogs/glyphslib/
• Repo: https://github.com/googlefonts/glyphsLib