Improve release procedure

[lbalmaceda]

This PR improves the release procedure. Fixing issues listed in #29

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@ea50add). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #30   +/-   ##
=========================================
  Coverage          ?   90.82%           
  Complexity        ?       82           
=========================================
  Files             ?       10           
  Lines             ?      229           
  Branches          ?       23           
=========================================
  Hits              ?      208           
  Misses            ?       17           
  Partials          ?        4

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