serde_json From_Row no more working since last serde / serde_json

[ghost]

Hi,

this line is nor more compiling since latest version of serde and serde_json:

let result: Result<(serde_json::Value,), sqlx::Error> = sqlx::query_as("select jsonb_build_object('version', version(), 'now', now()) j")
        .fetch_one
     ```

so how to fecth an unknown json structure ? 

Thanks