Updating SendIt code with PHP 8.1 features

[msmakouz]

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

[codecov]

Codecov Report

Merging #643 (11440f5) into 3.0 (7839ad5) will increase coverage by 0.00%.
The diff coverage is 45.45%.

@@            Coverage Diff            @@
##                3.0     #643   +/-   ##
=========================================
  Coverage     82.39%   82.39%           
  Complexity     5746     5746           
=========================================
  Files           667      667           
  Lines         14339    14329   -10     
=========================================
- Hits          11814    11807    -7     
+ Misses         2525     2522    -3     

Impacted Files	Coverage Δ
src/SendIt/src/Bootloader/BuilderBootloader.php	0.00% <ø> (ø)
src/SendIt/src/Bootloader/MailerBootloader.php	0.00% <0.00%> (ø)
src/SendIt/src/MessageSerializer.php	90.47% <0.00%> (ø)
src/SendIt/src/Renderer/ViewRenderer.php	0.00% <0.00%> (ø)
src/SendIt/src/Config/MailerConfig.php	100.00% <100.00%> (ø)
src/SendIt/src/MailJob.php	96.77% <100.00%> (-0.45%)	⬇️
src/SendIt/src/MailQueue.php	100.00% <100.00%> (ø)

---

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 7839ad5...11440f5. Read the comment docs.