Update to the new otf2ttf

[MatthewJPhillips]

Hey,

Is there a plan to update this package to the latest version of otf2ttf in the fonttools package? E.g this commit from last year is not in the release. I love how easy it is to install this using pip so I would be very keen to see this updated.

Or is your recommended practice to use the updated fonttools package for these conversions instead of relying on this project?

Thanks