v1.6.2 breaks Symfony 6.4 projects

[arneee]

Hi,

you have added a hard versioned dependency "symfony/validator": "6.3" in version 1.6.2, which basically downgrades all Symfony components to 6.3 if Mailjet is being used in a Symfony 6.4 project.

Please change it to ^6.3

Please see PR #283

Thanks!

[arneee]

I would also suggest to check if everything works with symfony/validator 7, since this is the latest version and limiting it to 6.x would be probably make this library incompatible with any Symfony 7 project.

[oleksandr-mykhailenko]

Hello @arneee
thank you for changes. Yes, we will make tests for Symfony 7