Use only meson dependency

[jcapriot]

Found out that numpy also had a numpy.pc package config file that can be relied upon for cross-compilation, so… simplify this again.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.93%. Comparing base (9bbb0d3) to head (c148e1b).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #79   +/-   ##
=======================================
  Coverage   85.93%   85.93%           
=======================================
  Files          31       31           
  Lines        3149     3149           
=======================================
  Hits         2706     2706           
  Misses        443      443           

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