Updates dependencies; fixes start script; refactors to add push support.

[colinbdclark]

Hi @drart, this should make your application work a little more smoothly. The .npmrc file instructs npm on how to build your application against Electron rather than a standard Node.js runtime, without needing all of the electron-rebuild stuff.

Electron needs to know where your source code entry point is, hence the addition of a "main" option in package.json. I switched to using requestAnimationFrame so that your animation will be well-timed.

There are much newer versions of Electron, but I think it's safest to link to this older one temporarily until I can ensure the rest of the stack is compatible. It also sounds like Electron 12 is going to make some majorly backwards-incompatible changes to how it handles native modules, so I think it's wise to be conservative with updates until libraries have had time to be updated.

I don't have an Ableton Push, so I have no idea if this will actually work, but it should get you a little closer anyway.

[drart]

Thanks @colinbdclark! It works wonderfully!
On my Catalina machine I had to install the full Xcode, which seems to be an issue with node-gyp. (see nodejs/node-gyp#1927)