Add property types

Types omitted in two places where we violate them currently:
Namespace_::$stmts can be null during parsing, and Enum_::$scalarType
can be a complex type for invali

Add property types

Types omitted in two places where we violate them currently:
Namespace_::$stmts can be null during parsing, and Enum_::$scalarType
can be a complex type for invalid programs.

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Remove emulation for unsupported PHP versions

Specify more types

Use PHPStan level 5

Add php-cs-fixer config and reformat

The formatting in this project has become something of a mess,
because it changed over time. Add a CS fixer config and reformat
to the desired st

Add php-cs-fixer config and reformat

The formatting in this project has become something of a mess,
because it changed over time. Add a CS fixer config and reformat
to the desired style, which is PSR-12, but with sane brace placement.

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Use extends instead of class_alias

Apparently we can't alias an internal class.

Use PHP 8.0 token representation

Migrate everything to use PhpToken-compatible token representation,
rather than the legacy array/string representation.