Update license headers

[mfl28]

Closes #120.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.46%. Comparing base (a66114a) to head (b460d71).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #121   +/-   ##
=========================================
  Coverage     86.46%   86.46%           
  Complexity     1480     1480           
=========================================
  Files            95       95           
  Lines          5933     5933           
  Branches        534      534           
=========================================
  Hits           5130     5130           
  Misses          527      527           
  Partials        276      276           

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