Update symfony dependency injection to v7

[Xerkus]

Q	A
Documentation	no
Bugfix	no
BC Break	no
New Feature	no
RFC	no
QA	yes

Description

Add v7 and drop v5

[Xerkus]

I do not understand why composer can not install v7

Removing platform from composer json I get this:

$ composer why-not symfony/dependency-injection 7.0.0
symfony/dependency-injection                 v7.0.0     requires         symfony/service-contracts (^3.3)                    
laminas/laminas-config-aggregator-parameters 1.15.x-dev does not require symfony/service-contracts (but v2.5.2 is installed) 
Not finding what you were looking for? Try calling `composer update "symfony/dependency-injection:7.0.0" --dry-run` to get another view on the problem.

$ composer why symfony/service-contracts
symfony/console              v7.0.1 requires symfony/service-contracts (^2.5|^3)   
symfony/dependency-injection v6.4.1 requires symfony/service-contracts (^2.5|^3.0) 

symfony/console                                v7.0.1    Eases the creation of beautiful and testable command line ...
symfony/dependency-injection                   v6.4.1    Allows you to standardize and centralize the way objects a...
symfony/deprecation-contracts                  v3.4.0    A generic function and convention to trigger deprecation n...
symfony/filesystem                             v7.0.0    Provides basic utilities for the filesystem
symfony/polyfill-ctype                         v1.28.0   Symfony polyfill for ctype functions
symfony/polyfill-intl-grapheme                 v1.28.0   Symfony polyfill for intl's grapheme_* functions
symfony/polyfill-intl-normalizer               v1.28.0   Symfony polyfill for intl's Normalizer class and related f...
symfony/polyfill-mbstring                      v1.28.0   Symfony polyfill for the Mbstring extension
symfony/service-contracts                      v2.5.2    Generic abstractions related to writing services
symfony/string                                 v7.0.0    Provides an object-oriented API to strings and deals with ...
symfony/var-exporter                           v7.0.1    Allows exporting any serializable PHP data structure to pl...

[Xerkus]

oh, I was using wrong command

$ composer why-not symfony/service-contracts 3.3.0
symfony/service-contracts                    v3.3.0     requires         psr/container (^2.0)

So laminas-config in dev deps prevents its installation and testing.

Blocked by laminas/laminas-config#24