BUG: fix xoscar installed by pypi not contains xoscar_pygloo.so

[YibinLiu666]

What do these changes do?

build CI passed at this link https://github.com/YibinLiu666/xoscar/actions/runs/5817934992

Related issue number

Fixes #61

Check code requirements

• [ ] tests added / passed (if needed)
• [ ] Ensure all linting tests pass

[codecov[bot]]

Codecov Report

Merging #62 (a40d83c) into main (125bb06) will decrease coverage by 0.49%. Report is 1 commits behind head on main. The diff coverage is n/a.

:exclamation: Current head a40d83c differs from pull request most recent head e643e01. Consider uploading reports for the commit e643e01 to get more accurate results

@@            Coverage Diff             @@
##             main      #62      +/-   ##
==========================================
- Coverage   94.28%   93.79%   -0.49%     
==========================================
  Files          47       47              
  Lines        3675     3675              
  Branches      709      709              
==========================================
- Hits         3465     3447      -18     
- Misses        137      152      +15     
- Partials       73       76       +3     

Flag	Coverage Δ
unittests	93.65% <ø> (-0.49%)	:arrow_down:

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see 4 files with indirect coverage changes