Fix ; (#56)

* fix handler explanation

* Update readme

* Update readme

* change String to Array and pass uint16_t

* remove ;

Author: ysmilda

src/ModbusSlave.cpp

@@ -833,7 +833,6 @@ uint16_t Modbus::writeResponse()
 
     // If we are not writing or the address is the broadcast address, cleanup and return.
     if (!_isResponseBufferWriting || isBroadcast())
-        ;
     {
         _isResponseBufferWriting = false;
         _responseBufferWriteIndex = 0;