Updating Exceptions, Files code with PHP 8.1 features

[msmakouz]

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

[codecov]

Codecov Report

Merging #626 (ed228c5) into 3.0 (06a5b93) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                3.0     #626      +/-   ##
============================================
- Coverage     83.48%   83.47%   -0.01%     
+ Complexity     5873     5872       -1     
============================================
  Files           667      667              
  Lines         14893    14890       -3     
============================================
- Hits          12433    12430       -3     
  Misses         2460     2460              

Impacted Files	Coverage Δ
src/Exceptions/src/AbstractHandler.php	92.30% <100.00%> (ø)
src/Exceptions/src/ConsoleHandler.php	93.33% <100.00%> (-0.09%)	⬇️
src/Exceptions/src/Highlighter.php	100.00% <100.00%> (ø)
src/Exceptions/src/HtmlHandler.php	96.15% <100.00%> (-0.08%)	⬇️
src/Exceptions/src/JsonHandler.php	100.00% <100.00%> (ø)
src/Exceptions/src/PlainHandler.php	97.05% <100.00%> (+0.08%)	⬆️
src/Exceptions/src/Style/ConsoleStyle.php	100.00% <100.00%> (ø)
src/Exceptions/src/Style/HtmlStyle.php	100.00% <100.00%> (ø)
src/Exceptions/src/Style/PlainStyle.php	100.00% <100.00%> (ø)
src/Exceptions/src/ValueWrapper.php	100.00% <100.00%> (ø)
... and 7 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 06a5b93...ed228c5. Read the comment docs.