perf: reduce JS wrapper overhead and fix EventEmitter inheritance

[cesco69]

• remove unnecessary JS indirection layers
• alias native methods directly on prototype

[brianc]

I like the setPrototype simply because it's more built in, but are you sure this does anything for performance? V8 is extremely good at inlining small functions like this and having this indirection layer allows for a nice place to patch in if something needs to be done in JS land. I would be pretty surprised if this adds overhead. If it does and you have benchmarks to show it I'll happily merge this though!

[cesco69]

It's just a micro-optimization. See this benchmark