Can anyone explain to me why this has a dependency on node? All the things it's using node to do can be done with Ruby (which it also depends on)? It always bug

Can anyone explain to me why this has a dependency on node? All the things it's using node to do can be done with Ruby (which it also depends on)? It always bugs me when a project has excessive dependencies without any good reason, and this is worse than an extra lib or two, this requires a second, entirely separate, ecosystem (Node vs. Ruby).