Bump fonttools from 4.11.0 to 4.12.0

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.11.0 to 4.12.0.
- [Release notes](https://github.com/fonttools/fonttools/releases)
- [Changelog](https://github.com/fonttools/fonttools/blob/master/NEWS.rst)
- [Commits](fonttools/fonttools@4.11.0...4.12.0)

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

Author: dependabot-preview[bot]

requirements.txt

@@ -5,5 +5,5 @@
 #    pip-compile
 #
 commandlines==0.4.1       # via font-line (setup.py)
-fonttools==4.11.0          # via font-line (setup.py)
+fonttools==4.12.0          # via font-line (setup.py)
 standardstreams==0.2.0    # via font-line (setup.py)