Update to use symfony v6 as a dependency

[PeterOcansey]

resolves #90

• [x] Update symfony dependency to v6

[fosron]

@PeterOcansey does this work with laravel mail plugin? Thats the point of update here.

[PeterOcansey]

Ok, I missed that.....I'll run a test on it, see how it works

[PeterOcansey]

@fosron Yeah, install in laravel-driver works fine, I also tested the driver in L10 project and sending email works too.