Added the option to querry different data types of inverter data

[BramBaert]

Although the server response always states it concerns "invPacData" I found that querying different "types" actually does give different data. For me the default value of 1 returns the MPPT POWER (DC power) what I don't want.

This is how I use the change:

for e in gw_api.inverterN000ueData:
    try:    
        data = gw_api.inverter_data(inverter_id, yesterday,data_type=e)
        loopDict = data['invPacData']
        df = pd.DataFrame(list(loopDict.items()), columns=["datetime", "value"])
        df["series"] = gw_api.inverterN000ueData(e).name
        all_data.append(copy.deepcopy(df))
    except Exception as e:
        logging.error(f"Got exception {e}")
        continue