Switch source file over to .glyphspackage

[drawcard]

.glyphspackage is a format designed for version control and it's easier to isolate merge conflicts with vs. the traditional .glyphs file format. Perhaps the source files could be saved in this format to make it easier to work with?

Auto conversion back to .glyphs can be done by going to File > Save As... or by using this tool: https://github.com/florianpircher/glyphspack (just in case legacy build tools can't work with .glyphspackage. )