Fix pyarrow deprecated warning

[DrRyanHuang]

Hi, thx for your good work!!

When I run xparl, it raise some pyarrow deprecated warning,

FutureWarning: 'pyarrow.default_serialization_context' is deprecated as of 2.0.0 and will be removed in a future version. Use pickle or the pyarrow IPC functionality instead.
  context = pyarrow.default_serialization_context()

As instruction of pandas-dev/pandas#39956 and apache/arrow#11239 , I made some attempts.

And, Happy Spring Festival!

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