docs: add edumucelli as a contributor

[allcontributors]

Adds @edumucelli as a contributor for code.

This was requested by markphelps in this comment

[codecov-io]

Codecov Report

Merging #389 (4ae607e) into master (b8d0ac8) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #389   +/-   ##
=======================================
  Coverage   82.53%   82.53%           
=======================================
  Files          16       16           
  Lines        1025     1025           
=======================================
  Hits          846      846           
  Misses        145      145           
  Partials       34       34           

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