Bump fonttools from 4.40.0 to 4.43.0

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.40.0 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@4.40.0...4.43.0)

---
updated-dependencies:
- dependency-name: fonttools
  dependency-type: direct:production
...

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

requirements.txt

@@ -34,7 +34,7 @@ fontbakery==0.8.13
 fontFeatures==1.7.4
 fontmake==3.6.0
 fontMath==0.9.3
-fonttools==4.40.0
+fonttools==4.43.0
 freetype-py==2.4.0
 fs==2.4.16
 gflanguages==0.8.9