Doesn't build when using ESP32 core 2.0.4 with Arduino

[av4625]

I have been using this library "fine" (there are a ton of compiler warnings) with 2.0.2 but there is a bug for SD cards in 2.0.2 meaning I updated to 2.0.4.

Now on 2.0.4 a lot of these compiler warnings are treated as errors and it no longer builds.

Errors are below, there are some other warnings as well that I have not shown.

Arduino/libraries/NeoGPS/src/ublox/ubxNMEA.cpp: In member function 'virtual bool ubloxNMEA::parseField(char)':
Arduino/libraries/NeoGPS/src/ublox/ubxNMEA.cpp:36:9: error: case value '10' not in enumerated type 'NMEAGPS::nmea_msg_t' [-Werror=switch]
         case PUBX_04: return parsePUBX_04( chr );
Arduino/libraries/NeoGPS/src/ublox/ubxGPS.cpp: In member function 'bool ubloxGPS::parseNavPvt(uint8_t)':
Arduino/libraries/NeoGPS/src/ublox/ubxGPS.cpp:629:8: error: unused variable 'ok' [-Werror=unused-variable]
   bool ok = true;
        ^~
Arduino/libraries/NeoGPS/src/ublox/ubxGPS.cpp:919:1: error: no return statement in function returning non-void [-Werror=return-type]
 } // parseNavPvt
 ^
Arduino/libraries/NeoGPS/src/ublox/ubxGPS.cpp: At global scope:
Arduino/libraries/NeoGPS/src/ublox/ubxGPS.cpp:118:13: error: 'char toHexDigit(uint8_t)' defined but not used [-Werror=unused-function]
 static char toHexDigit( uint8_t val )
             ^~~~~~~~~~
cc1plus: some warnings being treated as errors
cc1plus: some warnings being treated as errors