v1.6.1 to fix memory management bugs

### Release v1.6.1

1. Fix memory management bugs. Check [corrupt heap at MySQL_Connection destructor #19](#19) and [malloc server_version result not correctly handled may lead to memory corruption #20](#20)
2. Add support to SAMD21/SAMD51 boards using [Fab_SAM_Arduino core](https://github.com/qbolsee/ArduinoCore-fab-sam)
3. Add support to RP2040 boards using `Seeed RP2040 core`
4. Add `Packages' Patches` for [Fab_SAM_Arduino core](https://github.com/qbolsee/ArduinoCore-fab-sam)

Author: khoih-prog

README.md

@@ -209,7 +209,7 @@ This [**MySQL_MariaDB_Generic** library](https://github.com/khoih-prog/MySQL_Mar
  6. [`Arduino SAM DUE core v1.6.12+`](https://github.com/arduino/ArduinoCore-sam) for SAM DUE ARM Cortex-M3 boards.
  7. [`Arduino SAMD core 1.8.13+`](https://github.com/arduino/ArduinoCore-samd) for SAMD ARM Cortex-M0+ boards. [![GitHub release](https://img.shields.io/github/release/arduino/ArduinoCore-samd.svg)](https://github.com/arduino/ArduinoCore-samd/releases/latest)
  8. [`Adafruit SAMD core 1.7.9+`](https://github.com/adafruit/ArduinoCore-samd) for SAMD ARM Cortex-M0+ and M4 boards (Nano 33 IoT, etc.). [![GitHub release](https://img.shields.io/github/release/adafruit/ArduinoCore-samd.svg)](https://github.com/adafruit/ArduinoCore-samd/releases/latest)
- 9. [`[Fab_SAM_Arduino core v1.16.18-alpha2+`](https://github.com/qbolsee/ArduinoCore-fab-sam) for SAMD21/SAMD51 boards. [![GitHub release](https://img.shields.io/github/release/qbolsee/ArduinoCore-fab-sam.svg)](https://github.com/qbolsee/ArduinoCore-fab-sam/releases/latest)
+ 9. [`Fab_SAM_Arduino core v1.16.18-alpha2+`](https://github.com/qbolsee/ArduinoCore-fab-sam) for SAMD21/SAMD51 boards. [![GitHub release](https://img.shields.io/github/release/qbolsee/ArduinoCore-fab-sam.svg)](https://github.com/qbolsee/ArduinoCore-fab-sam/releases/latest)
 10. [`Seeeduino SAMD core 1.8.2+`](https://github.com/Seeed-Studio/ArduinoCore-samd) for SAMD21/SAMD51 boards (XIAO M0, Wio Terminal, etc.). [![Latest release](https://img.shields.io/github/release/Seeed-Studio/ArduinoCore-samd.svg)](https://github.com/Seeed-Studio/ArduinoCore-samd/releases/latest/)
 11. [`Seeeduino RP2040 core 1.12.0+`](https://github.com/Seeed-Studio) for XIAO RP2040 boards. 
 12. [`Adafruit nRF52 v1.3.0+`](https://github.com/adafruit/Adafruit_nRF52_Arduino) for nRF52 boards such as Adafruit NRF52840_FEATHER, NRF52832_FEATHER, NRF52840_FEATHER_SENSE, NRF52840_ITSYBITSY, NRF52840_CIRCUITPLAY, NRF52840_CLUE, NRF52840_METRO, NRF52840_PCA10056, PARTICLE_XENON, **NINA_B302_ublox**, etc. [![GitHub release](https://img.shields.io/github/release/adafruit/Adafruit_nRF52_Arduino.svg)](https://github.com/adafruit/Adafruit_nRF52_Arduino/releases/latest)