Bump fonttools from 4.27.1 to 4.28.3

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.27.1 to 4.28.3.
- [Release notes](https://github.com/fonttools/fonttools/releases)
- [Changelog](https://github.com/fonttools/fonttools/blob/main/NEWS.rst)
- [Commits](fonttools/fonttools@4.27.1...4.28.3)

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

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

Author: dependabot[bot]

requirements.txt

@@ -6,7 +6,7 @@
 #
 cython==0.29.25
     # via -r requirements.in
-fonttools==4.27.1
+fonttools==4.28.3
     # via -r requirements.in
 skia-pathops==0.6.0.post3
     # via -r requirements.in