Using `diff()` with tuples and arrays

Although `diff()` seems to work with scalar values such as

    @vars t
     diff( cos(t), t)    # = -sin(t)

it does not work on tuples

    @vars t
    pos = (cos(t), sin(t))
    dif( pos, t)  #error

or arrays

    @vars t
    pos = [cos(t), sin(t), 0.0]
    dif( pos, t)  #error

Are there plans to make `::Basic` types work with `Calculus.diff` and `Calculus.jacobian`?