Add es4x

[waghanza]

Hi @pmlopes,

Would you mind to add (or consent that we add) es4x in here ?

This project compare performance based on 3 routes :

• GET /, SHOULD return a successful status code and an empty string
• GET /user/:id, SHOULD return a successful status code and the id
• POST /user, SHOULD return a successful status code and an empty string

Regards,

[pmlopes]

Hi, like I've replied to the vertx-web request, if someone adds it, I'll gladly review it. I've no objections to it, after all, it's open source! 😅