Adds stub method for process.on

[danieldelcore]

https://nodejs.org/api/process.html

When LPM encounters a dependency using process.on like so:

It will throw the following error: typeerror: process.on is not a function

I'm not sure if this is a suitable enough stub method so feel free to let me know if there's a better way to handle it. 😄

[danieldelcore]

Sure thing! Done ✅