eepromNote.txt

Either replace the EEPROM.ccp and EEPROM.h files in  
windows - C:\Users\*your username*\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.6.3\libraries\EEPROM
Mac - /Users/*your username*/Library/Adruino15/packages/esp8266/hardware/esp8266/2.6.3/libraries/EEPROM

Or, change it by this step
1. go to your eeprom lib, on my win10 system the path looks like this:

windows - C:\Users\*your username*\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.6.3\libraries\EEPROM
Mac - /Users/*your username*/Library/Adruino15/packages/esp8266/hardware/esp8266/2.6.3/libraries/EEPROM

2. add something like this to your EEPROM.cpp :

	void EEPROMClass::update(int const address, uint8_t const value) {
		if (address < 0 || (size_t)address >= _size)
			return;
		if(!_data)
			return;

		// get data from eeprom
		uint8_t storedData = read(address);
		
		// check if the same
		if (storedData == value)
			return;
		
		// call of write() because it is different
		write(address, value);
	}

and the coresponding header prototype to your EEPROM.h:

  void update(int const address, uint8_t const val);  
	
3. now your code will compile, but It will still not work, the problem is you need to call:

  EEPROM.begin(*needed bytes of eeprom*);

and

  EEPROM.commit();

after everytime you wrote data via update/put... functions.