Latest version does not compile against ArduinoJson v6.20.0

[kevhaz]

Just a heads ups, but I had to ensure I remained on 6.19.4 in order for this module to compile.

[agcorcho]

Arduino 2.2.1
Json library instaled.
In file WebConfig.cpp line 27 : "#include <Arduino_Json.h>"
Should be : "#include <Arduino_JSON.h>"