Bump fonttools from 4.28.5 to 4.43.0 in /lib

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.28.5 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@4.28.5...4.43.0)

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

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

lib/requirements.txt

@@ -8,7 +8,7 @@ datrie==0.8.2
 dbus-python==1.2.18
 distlib==0.3.4
 filelock==3.4.2
-fonttools==4.28.5
+fonttools==4.43.0
 idna==3.3
 Jinja2==3.0.3
 kiwisolver==1.3.2