RUSTSEC-2020-0020: `stb_truetype` crate has been deprecated; use `ttf-parser` instead

[github-actions]

stb_truetype crate has been deprecated; use ttf-parser instead

Details
Status	unmaintained
Package	stb_truetype
Version	0.3.1
URL	https://gitlab.redox-os.org/redox-os/stb_truetype-rs/-/commit/f1f5be4794e87bfc80a4255bc3f23ed75dd77645
Date	2020-04-18

This crate was maintained for use in rusttype which has switched to use ttf-parser

See advisory page for additional details.