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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def heightmap_get_minmax(hm: np.ndarray) -> Tuple[float, float]: """Return the min and max values of this heightmap. Args: hm (numpy.ndarray):
 A numpy.ndarray formatted for heightmap functions. Returns: Tuple[float, float]: The (min, max) values. .. deprecated:: 2.0 Use ``hm.min()`` or ``hm.max()`` instead. """

    mi = ffi.new("float *")
    ma = ffi.new("float *")
    lib.TCOD_heightmap_get_minmax(_heightmap_cdata(hm), mi, ma)
    return mi[0], ma[0]