Please add homebridge-xiaomi-mi-air-purifier

[Albert711]

I will be very grateful if you will be able to add:
https://www.npmjs.com/package/homebridge-xiaomi-mi-air-purifier

Thank you in advance.

[nxhack]

I understand. Please give me a moment.

[nxhack]

https://github.com/nxhack/openwrt-node-packages/tree/master/node-homebridge-xiaomi-mi-air-purifier
It has been created. Please review it.