Can you translate it into english or explain the functions....?

Hello!

Device: Arduino Nano 33 BLE

Trying to compile an example TroykaGPS/HardwareSerial/HardwareSerialGpsTest.ino

TroykaGPS.cpp: In member function 'int GPS::readParsing()':
TroykaGPS.cpp:188:5: error: 'dtostrf' was not declared in this scope
     dtostrf(lalitudeSec, 6, 4, latitudeSecStr);
     ^~~~~~~
TroykaGPS.cpp:188:5: note: suggested alternative: 'strstr'
     dtostrf(lalitudeSec, 6, 4, latitudeSecStr);
     ^~~~~~~
     strstr
Compilation error: Error: 2 UNKNOWN: exit status 1

I have bought Troyka GPS shield and used example SoftwareSerial with Arduino UNO. I used wiring from the article
http://wiki.amperka.ru/products:troyka-gps-glonass-v2
But i have only connected +5v, Gnd and TRX pins. The example hangs at readParsing()... I have no idea what to do =(
I have imported TroykaGPS library to be able local modifications and saw that "char c = uartDeviceReadSerial();" always returns zero.

With Arduino IDE 1.8.5:

C:\Users\tischenkoav\Documents\Arduino\libraries\TroykaGPS\src\TroykaGPS.cpp: In member function 'int GPS::readParsing()':

C:\Users\tischenkoav\Documents\Arduino\libraries\TroykaGPS\src\TroykaGPS.cpp:92:52: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]

         setHeaderState(c, &_findGNGGA, "$GNGGA");

                                                ^

C:\Users\tischenkoav\Documents\Arduino\libraries\TroykaGPS\src\TroykaGPS.cpp:93:52: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]

         setHeaderState(c, &_findGNRMC, "$GNRMC");

                                                ^

В функции getHour() и getTime()/getDate() внести поправку на часовой пояс. А именно написать алгоритм, по которому, при задаваемом пользователем смещении по часовому поясу, функции корректно отображали время и дату. В данный момент функции getTime()/getDate() работают только по Гринвичу, а getHour() со смещением на 3 часа вперед (т.е. от 03:00 до 27:00 (предположительно)).