lang/phph80: Upgrade from RC 5 to 8.0.0

PHP 8.0 comes with numerous improvements and new features such as:

Union Types
Named Arguments
Match Expressions
Attributes
Constructor Property Promotion
Nullsafe Operator
Weak Maps
Just In Time Compilation
And much much more...

Take a look at the PHP 8.0 Announcement Addendum for more information:
https://www.php.net/releases/8.0/

Sponsored by: PHP Update Service