0.12.0 release

[rodrigo-arenas]

This PR releases the 0.12.0 version

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.37%. Comparing base (1ae6698) to head (b9169be).
Report is 9 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #168   +/-   ##
=======================================
  Coverage   95.37%   95.37%           
=======================================
  Files          26       26           
  Lines        1189     1189           
=======================================
  Hits         1134     1134           
  Misses         55       55           

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