The latest version is only for esp8266. Latest version on the library ArduinoJson 6.xx.
Dependency Graph
|-- ArduinoJson @ 6.19.3+sha.bf5d0c7
|-- DFRobotDFPlayerMini @ 1.0.5+sha.e15e9fc
|-- FastBot @ 1.7.0+sha.666f87f
|-- FastLED @ 3.5.0+sha.4d73cdd
|-- FTP @ 0.0.0+sha.f3521ff
|-- GyverButton @ 3.8.0+sha.9511222
|-- WiFiManager @ 2.0.9-beta+sha.b436830
|-- EspSoftwareSerial @ 8.0.1+sha.c0dc6d6
|-- LittleFS @ 0.1.0
|-- ESP8266HTTPClient @ 1.2
|-- ESP8266WiFi @ 1.0
|-- ESP8266HTTPUpdateServer @ 1.0
|-- ESP8266WebServer @ 1.0
|-- ESP8266mDNS @ 1.2