Enhancement: Update license year

[localheinz]

This PR

• updates the license year

[codecov]

Codecov Report

Merging #321 (252d27d) into main (4f2fa40) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #321   +/-   ##
=========================================
  Coverage     90.20%   90.20%           
  Complexity      150      150           
=========================================
  Files            23       23           
  Lines           429      429           
=========================================
  Hits            387      387           
  Misses           42       42           

Impacted Files	Coverage Δ	Complexity Δ
src/Classes/FinalRule.php	94.11% <ø> (ø)	17.00 <0.00> (ø)
src/Classes/NoExtendsRule.php	90.90% <ø> (ø)	7.00 <0.00> (ø)
...asses/PHPUnit/Framework/TestCaseWithSuffixRule.php	82.14% <ø> (ø)	11.00 <0.00> (ø)
...c/Closures/NoNullableReturnTypeDeclarationRule.php	77.77% <ø> (ø)	4.00 <0.00> (ø)
...c/Closures/NoParameterWithNullDefaultValueRule.php	89.47% <ø> (ø)	6.00 <0.00> (ø)
...res/NoParameterWithNullableTypeDeclarationRule.php	88.23% <ø> (ø)	5.00 <0.00> (ø)
src/Expressions/NoCompactRule.php	72.72% <ø> (ø)	5.00 <0.00> (ø)
src/Expressions/NoEmptyRule.php	100.00% <ø> (ø)	2.00 <0.00> (ø)
src/Expressions/NoErrorSuppressionRule.php	100.00% <ø> (ø)	2.00 <0.00> (ø)
src/Expressions/NoEvalRule.php	100.00% <ø> (ø)	2.00 <0.00> (ø)
... and 13 more

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