Lay-Z Spa Whirlpool Integration to Homebridge

First of all - big thanks to cyb3rl4d for reverse engineering how the lay-z api works.

It was the basis of this module.

https://github.com/cyb3rl4d/Lay-Z-Spa/blob/master/README.md

Also, big thanks to

https://github.com/schoendort/lazy_spa

where I saw how the requests for the bestways api are done.