Font builder parameters
Very happy to see this project is picking up steam again, it's my favorite icon library!

There are a few custom icons I wanted to add that probably wouldn't make sense to have part of Remixicon so I was wondering if I could build it myself to generate the same CSS+font files that you have in the source?

I saw in a comment that you use https://github.com/nfroidure/svgicons2svgfont to generate the font files but would it be possible to share the build file or the CLI command you use to get the output you have in the `fonts` folder? That would be very helpful!