Bump fonttools from 4.34.4 to 4.43.0

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.34.4 to 4.43.0.
- [Release notes](https://github.com/fonttools/fonttools/releases)
- [Changelog](https://github.com/fonttools/fonttools/blob/main/NEWS.rst)
- [Commits](fonttools/fonttools@4.34.4...4.43.0)

---
updated-dependencies:
- dependency-name: fonttools
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -10,7 +10,7 @@ defcon==0.10.2
 fontMath==0.9.2
 fontParts==0.10.7
 fontPens==0.2.4
-fonttools==4.34.4
+fonttools==4.43.0
 fs==2.4.16
 lxml==4.9.1
 MutatorMath==3.0.1