Apply to all functions

[davearata-snorack]

Added functionality so that if you pass null as the first parameter tomiddlewaremanager.use it will apply the middleware to all functions in the given object.

[davearata-snorack]

@unbug any chance this can be reviewed and merged?

[unbug]

Sorry @davearata-snorack , I prefer not to take advantage of the params. I suggest you could do :

Object.getOwnPropertyNames(Person.prototype).forEach(method => {
  if(method !== 'constructor') {
      middlewareManager.use(method, logger);
  }
});