* Import functions in the ArduinoJson namespace to get clearer errors * Improved syntax highlighting in Arduino IDE * Removed default capacity of `DynamicJsonDocument` * `JsonArray::copyFrom()` accepts `JsonArrayConst` * `JsonVariant::set()` accepts `JsonArrayConst` and `JsonObjectConst` * `JsonDocument` was missing in the ArduinoJson namespace * Added `memoryUsage()` to `JsonArray`, `JsonObject`, and `JsonVariant` * Added `nesting()` to `JsonArray`, `JsonDocument`, `JsonObject`, and `JsonVariant` * Replaced `JsonDocument::nestingLimit` with an additional parameter