Enable LightLoad function in IP5306.py to enable wake from deepsleep

[varna9000]

Hi, can you implement this function, in ip5306.py? If module is powered only on battery, the chip powers down the whole circuit if esp32 is put into deep sleep and it cannot wake after that. I read that if we enable the PowerBoost function of IP5306, the chip would keep minimal current to esp32 and thus it would be able to wake up from deep sleep. Can you add this function to the driver?