Support both Symfony 6 and 7

[enricobono]

With version 7.0.0 we dropped support for Symfony 6, but the latest versions of the main library graphqlite still support both Symfony 6 and 7.

So, with this PR we reintroduce the support for Symfony 6.

[andrew-demb]

Just checked in local env tests with symfony/validator 6 - it works

[enricobono]

@andrew-demb I as thinking about release this change as version 7.2.0.
Then we could release thecodingmachine/graphqlite-bundle#239 as 7.2.0 as well.

WDYT?

[andrew-demb]

I'm OK with minor release here.

But I don't see the reason why any change required in the bundle after release here

[enricobono]

Actually, you are right 😅
My bad. 😄

So, what do you suggest? We can merge the current release and tag it?

[andrew-demb]

Yes, it is

[enricobono]

Release ready here:
https://github.com/thecodingmachine/graphqlite-symfony-validator-bridge/releases/tag/untagged-90f590612593c7fa2acf

Would you please take a look at it, before we release it?

[andrew-demb]

@enricobono I'm ok with current state, thanks