Pumps supporting 3 states (OFF, LOW, HIGH)

[VVlasy]

Originally suggested by @sebaastianVBH

Currently only 2 states are supported (OFF, HIGH)
Pumps can support 3 states (OFF, LOW, HIGH) as well. Responses from the API tell the capabilities of each pump.

[VVlasy]

Done by @sebaastianVBH

https://gitlab.com/SebastiaanVBH/controlmyspajs/-/commit/c31a598e5b68d3d110447540d1c0751f9aebd535