Bump fontparts from 0.11.0 to 0.12.1

Bumps [fontparts](https://github.com/robotools/fontParts) from 0.11.0 to 0.12.1.
- [Release notes](https://github.com/robotools/fontParts/releases)
- [Changelog](https://github.com/robotools/fontParts/blob/master/NEWS.rst)
- [Commits](robotools/fontParts@0.11.0...0.12.1)

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

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

requirements.txt

@@ -8,7 +8,7 @@ click==8.1.3
 cu2qu==1.6.7.post2
 defcon==0.10.3
 fontMath==0.9.3
-fontParts==0.11.0
+fontParts==0.12.1
 fontPens==0.2.4
 fonttools==4.43.0
 fs==2.4.16