Easier font-path on OSX

[brodock]

I found an easier workflow on OSX to patch fonts:

brew install fontforge
fontforge -script font-patcher /path/to/the/font

doing that you don't have to install older python only to patch fonts, as "fontforge" has already an embedded python environment

[ryanoasis]

@brodock I will update the readme with this info thanks 👍

[github-actions]

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