Enhancement: Update license year

[localheinz]

This PR

• updates the license year

[codecov]

Codecov Report

Merging #327 (1ab15c0) into main (dd57c24) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##                main      #327   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity         8         8           
===========================================
  Files              2         2           
  Lines             24        24           
===========================================
  Hits              24        24           

Impacted Files	Coverage Δ	Complexity Δ
src/Factory.php	100.00% <ø> (ø)	2.00 <0.00> (ø)
src/RuleSet/AbstractRuleSet.php	100.00% <ø> (ø)	6.00 <0.00> (ø)

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