Release 6.0.0

[igordeveloper]

• Support only for PHP attributes
• Require PHP 8.2 or higher
• Require PHPUnit 11 or higher (dev)
• Require Pcov extension for coverage tests (dev)
• PSR12 coding style

[rdohms]

@igordeveloper looks like we need to adjust the CI for the new limitations, I'll try to get to that later, unless you want to take a stab at it.

Not too important for now, but would have made this easier to review is to break the work down in commits, so I can review commit by commit instead of a big blog of 58 files.

[igordeveloper]

@rdohms , I will fix the Ci tests and split commits .. thank you!