Ref: Async peers instead of changing config type

[RobinTail]

There is a thing that I don't like in #1301 — the direction where config goes.
In my initial concept, I wanted to achieve the simplicity of config, being object of primitive properties.
Here I'd like to explore another direction by restoring back compression and upload as bool | Options, but instead — trying to import the corresponding peers dynamically.
For that, however, createServer has to become async, which is also breaking, but I believe, might be much less breaking, and the outcome of that should be nicer.

[RobinTail]

looks fine.
And it seems to be working good.
I like it this way, so the config will remain simpler.

[RobinTail]

Restored documentation and adjusted the changelog.
LGTM