Description
I'm currently using ArduinoJson-6.18.5 without Arduino on AVR. I have provided the FlashStringHelper to support the flash string overloads.
Trying to upgrade to ArduinoJson-6.21 I run into the issue that I require Arduino.h when ARDUINOJSON_ENABLE_PROGMEM is enabled.
The pgm defines are available on AVR.
Does the library need someting from Arduino to work with generic AVR flash/pgm data? Can we do without the Arduino.h?