How to use a pre-defined family name in register_font.cc?

Context: Creating png images using custom fonts

Not super familiar with node-canvas's c++ side of things so I may be way off but it seems there is some sort of caching going on. I'm having an issue where some fonts within a family all render using the exact same font face (whichever font was registered first being the one that is used for all subsequent fonts). While digging, I found that these fonts have the same "preferred family name" and the same "style" properties within their meta info (using FontForge). Using FontForge to change the preferred family name, I was able to get these to work properly but thats not a solution for how we're using node-canvas.

https://github.com/Automattic/node-canvas/blob/d2d632402b7032fb0ff755be138d20b87766aff6/examples/font.js#L14

The above example hints that the family name and styles within the font's meta info will be used... Is there a way to override that behavior and provide pre-defined names instead of using whats provided inside the file itself?

I'm using register font like this:

```
registerFont(localFilepath, { family: options.localFontName })
```

env... canvas 2.6.0, node 12, OSX and FreeBSD