MAINT Adding meson compiler directives

[adam2392]

possibly related: #226

Changes proposed in this pull request:

• The changes in the Cython code are to update to the latest commit ID in the submodule

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.06%. Comparing base (8ceada5) to head (1aebc3c).
Report is 3 commits behind head on main.

❗ Current head 1aebc3c differs from pull request most recent head d3f36eb. Consider uploading reports for the commit d3f36eb to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #242      +/-   ##
==========================================
+ Coverage   89.94%   90.06%   +0.12%     
==========================================
  Files          54       54              
  Lines        5050     5051       +1     
==========================================
+ Hits         4542     4549       +7     
+ Misses        508      502       -6     

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[sampan501]

Looks good to me pending green CIs