CI: early compatibility checks with Symfony 7

[keradus]

No description provided.

[coveralls]

coverage: 94.784%. remained the same
when pulling 4c443f8 on keradus:symfony_7
into 1d612d2 on PHP-CS-Fixer:master.

[keradus]

🤷🏻

[VincentLanglet]

Since your Ci is running successfully with SF 7, would it be ok to add || ^7.0 in the composer.json in order to allow us trying SF 7 on our CI too ? Thanks 🙏

I can do the PR if accepted

cc @Wirone

[keradus]

from semver perspective, 7@beta can still break BC before releasing 7@stable.
is core Symfony team confirming to not introduce any more BC breaks for v7 line? if not, I prefer to wait for stable release.

[VincentLanglet]

is core Symfony team confirming to not introduce any more BC breaks for v7 line? if not, I prefer to wait for stable release.

No idea, I see multiple fixes but I can't guarantee about BC-break indeed.
Maybe @nicolas-grekas can provide an answer for this (?)

[nicolas-grekas]

RC1 means no BC breaks anymore so it's safe to allow 7 IMHO

[VincentLanglet]

Thanks ; I opened #7453 @keradus then.

[keradus]

ah, it's already RC? nice!