Bump fonttools from 4.37.2 to 4.43.0

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.37.2 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@4.37.2...4.43.0)

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

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

requirements.txt

@@ -7,7 +7,7 @@ cu2qu==1.6.7.post1
 fontbakery[freetype]==0.8.10
 fontmake==3.4.0
 fontMath==0.9.2
-fonttools==4.37.2
+fonttools==4.43.0
 fs==2.4.16
 gftools==0.9.26
 glyphsLib==6.1.0