Reduce binaries size

[Luni-4]

This PR fixes #430

With the new Rust 1.59 version, it is possible to strip standard library debug symbols directly from Cargo

[codecov-commenter]

Codecov Report

Merging #798 (caaa0b7) into master (98538cb) will increase coverage by 0.30%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #798      +/-   ##
==========================================
+ Coverage   39.63%   39.94%   +0.30%     
==========================================
  Files          51       51              
  Lines        6827     6827              
  Branches      975      975              
==========================================
+ Hits         2706     2727      +21     
+ Misses       3453     3439      -14     
+ Partials      668      661       -7     

Impacted Files	Coverage Δ
src/metrics/nargs.rs	74.80% <0.00%> (+0.38%)	⬆️
src/metrics/nom.rs	73.15% <0.00%> (+0.52%)	⬆️
src/spaces.rs	72.56% <0.00%> (+1.21%)	⬆️
src/getter.rs	80.43% <0.00%> (+3.91%)	⬆️
src/node.rs	86.53% <0.00%> (+15.38%)	⬆️

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