errors converting std::string to String

[haywireSSC]

on line 117 and 106 throws errors unless explicitly cast from string to c string. I added .c_str to each now it works

[TriDEntApollO]

Refer to this pull request #343 of mine for the fix

[ChiuHuang]

1. Convert std::string to String in BleKeyboard.cpp:
   • Locate BLEDevice::init(deviceName); and change it to:

     BLEDevice::init(String(deviceName.c_str()));

   • Locate hid->manufacturer()->setValue(deviceManufacturer); and change it to:

     hid->manufacturer()->setValue(String(deviceManufacturer.c_str()));