…ons before 6.4

…icolas-grekas)

This PR was merged into the 1.x branch.

Discussion
----------

Fix keeping platform requirements when rebooting composer

Commits
-------

9aca8f3 Fix keeping platform requirements when rebooting composer

… for versions before 6.4 (nicolas-grekas)

This PR was merged into the 1.x branch.

Discussion
----------

Decouple psr-http-message-bridge from extra.symfony.require for versions before 6.4

Should fix issues like getsentry/sentry-symfony#750 and symfony/recipes#1236

Before 6.4, the bridge was not in `symfony/symfony` so that `extra.symfony.require` shouldn't apply to earlier versions.

We *could* improve the API and flex to handle this concern at a more generic level, but this is so rare that I suggest hard-coding the rule in flex.

Commits
-------

42276be Decouple psr-http-message-bridge from extra.symfony.require for versions before 6.4