Support additional parameters in swarm init

[SoerenBusse]

Long story short

Currently there is no way to set some additional parameters when creating a swarm. For example "DefaultAddrPool" is missing as it exists in the documentation: https://docs.docker.com/engine/api/v1.40/#operation/SwarmInit

The code only allows some predefined parameters:

aiodocker/aiodocker/swarm.py

Lines 31 to 36 in 335acad

	data = {
	"AdvertiseAddr": advertise_addr,
	"ListenAddr": listen_addr,
	"ForceNewCluster": force_new_cluster,
	"Spec": swarm_spec,
	}

Maybe it would be possible to allow kwargs to specify custom parameters?

[asvetlov]

Sorry, **kwargs is a bad option for many reasons, the lack of typing info is on the list.
Please enumerate all missing args explicitly as we do already for a few, e.g. advertise_addr.

The test is welcome!