Add submission # 5003

#5003

Author: ArduinoBot

registry.txt

@@ -7378,3 +7378,4 @@ https://github.com/yuri-rage/arduino-i2c-slave.git|Contributed|I2C_Slave
 https://github.com/arduino-libraries/Arduino_LowPowerPortentaC33.git|Arduino|Arduino_LowPowerPortentaC33
 https://bitbucket.org/jezhill/SyncGenie.git|Contributed|SyncGenie
 https://github.com/PowerBroker2/Filters.git|Contributed|DSPFilters
+https://github.com/Rupakpoddar/FirebaseArduino.git|Contributed|Firebase