`QuadPrecision(1).data` raises `TypeError`

[jorenham]

on the current main (d90519b):

>>> import numpy as np; from numpy_quaddtype import *
>>> np.longdouble(1).data
<memory at 0x70fe85d56200>
>>> QuadPrecision(1).data
Traceback (most recent call last):
  File "<python-input-2>", line 1, in <module>
    QuadPrecision(1).data
TypeError: NumPy scalar QuadPrecision('1.0e+000', backend='sleef') can only exported as a buffer without format.

I expected it to return an instance of builtins.memoryview, analogous to np.longdouble(1).data