Library is not compatible with ArduinoJson Version 6 (Beta)

[mnemocron]

The Telegram Library does not compile when using the ArduinoJson Library version(s) 6 (beta) and up.

This issue is discussed on the ArduinoJson respository as well.
bblanchon/ArduinoJson/issues/756

My suggestion for now is to add a notice in the readme.md and fix the library once ArduinoJson 6 is released.

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I tried to compile the following example: hackster.io
It works without issues in the latest ArduinoJson 5.13.4 (stable)
Error Message:

C:\Users\simon\Documents\Arduino\libraries\TelegramBot\src\TelegramBot.cpp: In member function 'message TelegramBot::getUpdates()':

C:\Users\simon\Documents\Arduino\libraries\TelegramBot\src\TelegramBot.cpp:39:4: error: 'StaticJsonBuffer' was not declared in this scope

    StaticJsonBuffer<JSON_BUFF_SIZE> jsonBuffer;

[tobozo]

probably not a good example but this sketch implements both 5.x and 6.x syntaxes