ArduinoJson 7.1.0 * Add `ARDUINOJSON_STRING_LENGTH_SIZE` to the namespace name * Add support for MsgPack binary (PR #2078 by @Sanae6) * Add support for MsgPack extension * Make string support even more generic (PR #2084 by @d-a-v) * Optimize `deserializeMsgPack()` * Allow using a `JsonVariant` as a key or index (issue #2080)