Wrong value set

Based on [API Help](https://pvoutput.org/help.html#api-addstatus), parameter `v1` is energy generated (WattHour) and `v2` is power generated (Watt). [Line 23](https://github.com/CONNCTED/PVoutput-NodeJS/blob/6708f88ad87c31ca83d6702f26c1c242b16e4b75/pvoutput-api.js#L23) shows `v1` being sent as power and not as energy.
