Genericons has had an overhaul recently. According to this Github note from Joen Asmussen, they’ve changed the build process to Node.js and Grunt, prioritized SVG over icon-fonts, removed social icons, and focusing on “being just an icon set.” The release will be in a long beta while Joen goes on sabbatical for a few months, so if you use Genericons in your plugins or themes you have some time to give it a spin.