Updating Router code with PHP 8.1 features

[msmakouz]

Q	A
Bugfix?	❌
Breaks BC?	❌
New feature?	❌
Issues	#512

[codecov]

Codecov Report

Merging #639 (c992045) into 3.0 (c91aa21) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                3.0     #639      +/-   ##
============================================
- Coverage     82.45%   82.41%   -0.04%     
+ Complexity     5762     5750      -12     
============================================
  Files           667      667              
  Lines         14394    14362      -32     
============================================
- Hits          11868    11837      -31     
+ Misses         2526     2525       -1     

Impacted Files	Coverage Δ
src/Router/src/Traits/ContainerTrait.php	100.00% <ø> (ø)
src/Router/src/Traits/DefaultsTrait.php	100.00% <ø> (ø)
src/Router/src/AbstractRoute.php	100.00% <100.00%> (ø)
src/Router/src/Autofill.php	100.00% <100.00%> (ø)
src/Router/src/CoreHandler.php	100.00% <100.00%> (+1.56%)	⬆️
...rc/Router/src/Exception/RouteNotFoundException.php	50.00% <100.00%> (-10.00%)	⬇️
src/Router/src/GroupRegistry.php	100.00% <100.00%> (ø)
src/Router/src/Route.php	95.45% <100.00%> (+0.10%)	⬆️
src/Router/src/RouteGroup.php	86.84% <100.00%> (-1.26%)	⬇️
src/Router/src/Router.php	96.36% <100.00%> (-0.07%)	⬇️
... and 11 more

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