Use electron-rebuild in rebuild code

[aminya]

As discussed in atom-community/atom#111 and atom#889 (comment) the apm rebuild code is kind of wonky, and I can't trust it.

We should use electron-rebuild which is the official way to build Node modules against a specific Electron version.

Here is the documentation about Node modules in Electron.
electronjs.org/docs/tutorial/using-native-node-modules

[DeeDeeG]

No comment on this approach.

For the record, this is what apm is already doing: https://www.electronjs.org/docs/tutorial/using-native-node-modules#using-npm