Merge pull request #21 from arduino/Hannes7eicher/DFRobot_SGP40

add SHT21-Arduino-Library

Author: Hannes7eicher

readme.md

@@ -111,6 +111,7 @@ This list contains the status of tested Arduino libraries with the UNO R4 board.
 | 31. | [ADXL345](https://github.com/sparkfun/SparkFun_ADXL345_Arduino_Library)                                        | FAIL ❌      | FAIL ❌        |       |
 | 32. | [SHT21-Arduino-Library](https://github.com/SolderedElectronics/SHT21-Arduino-Library)                          | PASS  ✅     | PASS  ✅       |       |
 | 33. | [ArduinoJoystickLibrary](https://github.com/MHeironimus/ArduinoJoystickLibrary/tree/master)                    | FAIL ❌      | FAIL ❌        |       |
+| 34. | [SHT21-Arduino-Library](https://github.com/SolderedElectronics/SHT21-Arduino-Library)                          | PASS  ✅     | PASS  ✅       |       |
 
 ### Displays