Expose watchboy API as well

[PaulSender]

In order to correct do things (in my case track the recompile time of electronmon), it would be nice to be able to hook into watch boy and methods like watcher.on('change').... An example of a package that does this is webpack

[catdad]

I am not sure I understand. Electronmon is not a compiler. I am not sure what it has to do with a webpack API.