Readme updated

arduinoWebsSockets must be at least version 2.2.0

Author: sivar2311

README.md

@@ -23,7 +23,7 @@
 
 ## Dependencies
 [ArduinoJson](https://github.com/bblanchon/ArduinoJson) by Benoit Blanchon (minimum Version 6.12.0)   
-[WebSockets](https://github.com/Links2004/arduinoWebSockets) by Markus Sattler (minimum Version 2.1.4)  
+[WebSockets](https://github.com/Links2004/arduinoWebSockets) by Markus Sattler (minimum Version 2.2.0)  
 
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