Added

• [PHP 8.0] Added support for named arguments, represented using a new name subnode on Arg.
• [PHP 8.0] Added support for static return type, represented like a normal class return type.
• [PHP 8.0] Added support for throw expression, represented using a new Expr\Throw_ node. For backwards compatibility reasons, throw expressions in statement context continue to be represented using Stmt\Throw_.
• [PHP 8.0] Added support for keywords as parts of namespaced names.

Fixed

• Emit parentheses for class constant fetch with complex left-hand-side.
• Emit parentheses for new/instanceof on complex class expression.