Fix the PyMUTEX_LOCK error on Mac

[wangyinz]

When importing any of the pybind11 compiled modules. It will error out with the error:

% python -c "import  mspasspy.ccore.io"                           
Fatal Python error: PyMUTEX_LOCK(gil->mutex) failed
Python runtime state: unknown

zsh: abort      python -c "import  mspasspy.ccore.io"

This is on Python 3.8, but there are different behavior of seemingly the same error on other versions of Python too. The discussion here helped identified the issue.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.58%. Comparing base (9e1e025) to head (b2b513b).

❗ Current head b2b513b differs from pull request most recent head 3baf40b

Please upload reports for the commit 3baf40b to get more accurate results.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #538   +/-   ##
=======================================
  Coverage   54.58%   54.58%           
=======================================
  Files         146      146           
  Lines       22363    22363           
  Branches     1336     1336           
=======================================
  Hits        12207    12207           
  Misses       9816     9816           
  Partials      340      340           

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