gree-hvac-client
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Adding GCM encryption support.
This adds GCM encryption which can be toogled on via new client option encryptionVersion
(1 = ECB, 2 = GCM). It is needed for newer firmware versions and replaces existing ECB for all pack encryptions BUT the scan command, which still runs on ECB for compatibility.
Tested on firmware 362001065279+U-WB05RT13V1.23
This satisfies #22.