[Python] Can't create array from Categorical with numpy 1.20

In [16]: pa.lib.array(pd.Categorical(['a', 'b', 'c']))
---------------------------------------------------------------------------
ArrowTypeError                            Traceback (most recent call last)
<ipython-input-16-f1ab121f9533> in <module>
----> 1 pa.lib.array(pd.Categorical(['a', 'b', 'c']))~/.miniconda3/lib/python3.7/site-packages/pyarrow/array.pxi in pyarrow.lib.array()~/.miniconda3/lib/python3.7/site-packages/pyarrow/array.pxi in pyarrow.lib._codes_to_indices()~/.miniconda3/lib/python3.7/site-packages/pyarrow/array.pxi in pyarrow.lib.array()~/.miniconda3/lib/python3.7/site-packages/pyarrow/array.pxi in pyarrow.lib._ndarray_to_array()~/.miniconda3/lib/python3.7/site-packages/pyarrow/array.pxi in pyarrow.lib._ndarray_to_type()~/.miniconda3/lib/python3.7/site-packages/pyarrow/error.pxi in pyarrow.lib.check_status()ArrowTypeError: Did not pass numpy.dtype object

In [13]: pa.lib.array(pd.Categorical(['a', 'b', 'c']))
Out[13]:
<pyarrow.lib.DictionaryArray object at 0x7febac27ad50>-- dictionary:
  [
    "a",
    "b",
    "c"
  ]
-- indices:
  [
    0,
    1,
    2
  ]