Add release-drafter

[codecov[bot]]

Codecov Report

Merging #138 (9c724bb) into master (5b2599c) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #138   +/-   ##
=========================================
  Coverage     87.82%   87.82%           
  Complexity      455      455           
=========================================
  Files            37       37           
  Lines          1577     1577           
  Branches        179      179           
=========================================
  Hits           1385     1385           
  Misses          139      139           
  Partials         53       53           

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[gkorland]

@filipecosta90 thanks