Use date range for the license copyright

[Baptouuuu]

Closes #4

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.89%. Comparing base (dcce873) to head (690dc83).
Report is 2 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop       #6   +/-   ##
==========================================
  Coverage      69.89%   69.89%           
  Complexity       132      132           
==========================================
  Files             17       17           
  Lines            485      485           
==========================================
  Hits             339      339           
  Misses           146      146           

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