Bump fonttools from 4.29.1 to 4.43.0 in /tests

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.29.1 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@4.29.1...4.43.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

tests/requirements_frozen.txt

@@ -24,7 +24,7 @@ executing==0.8.2
 Flask==2.3.2
 Flask-Login==0.5.0
 Flask-Session==0.4.0
-fonttools==4.29.1
+fonttools==4.43.0
 gitdb==4.0.9
 GitPython==3.1.37
 greenlet==1.1.2