Update Symfony package versions to include 8.0.0

[Spomky]

This PR enables Symfony 8 dependencies.

[asgrim]

Looks like composer.lock needs an update too please

[Spomky]

Not sure why the composer.lock is present on a library but ok I will update it.

[asgrim]

Thanks 👍

[Spomky]

Done.
Let's run the test suites.

[asgrim]

Hmm; the composer update should be run with the widest compatible dependency set; typically php8.1 /usr/local/bin/composer update or similar should suffice.

Not sure why the composer.lock is present on a library

This allows us to develop and test against a fixed set of dependencies (usually the widest, as noted above), and CI can test all other permutations.

[Spomky]

Failing tests (PHP8.1 to 8.3 locked) are because SF 8 require PHP 8.4+.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (7.7.x@df24aac). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff            @@
##             7.7.x     #808   +/-   ##
========================================
  Coverage         ?   36.74%           
  Complexity       ?      283           
========================================
  Files            ?       27           
  Lines            ?     1132           
  Branches         ?        0           
========================================
  Hits             ?      416           
  Misses           ?      716           
  Partials         ?        0           

Flag	Coverage Δ
phpunit	36.74% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.