$ echo "[1, 2, 3]" | nu -c 'cat | from json | to yaml'
    ---
    - 1
    - 2
    - 3
    
    $ echo '{"key": [1, 2, 3]}' | nu -c 'cat | from json | to yaml'
    ---
    key:
      - 1
      - 2
      - 3