Set different coefficient

[dansashalesser]

I tried adjusting the adjustment coefficient for calibration, but it doesn't like it recognizes the command. Tried hpma115S0.SetAdjustmentCoefficient(120);, hpma115S0.SetCustomerAdjustmentCoefficient(120);, hpma115S0.SetCustomerCoefficient(120);
All saying "'class HPMA115S0' has no member named 'SetAdjustmentCoefficient'".
Any idea?

[roy-zahor]

See my PR #12